This term in science, we have been learning about energy and energy at home. What I have learnt is that the fluorescent bulbs are really wasteful because they produce more heat which is 80% then they do light which is raising costs on your power bills. I have also learned how to read a electricity meter. Also how energy transfers through the home.

This will help me in the future by managing bills and also having to do another project like this then I will have knowledge before hand.

science @ home reflection

throuht out this term i have been discuvering how energy is wasted and used around my home.

what i lernt from this task
i found out that at my home i have 3 phases, because of the langth of my drive way and becaus of my aircondition, which wastes a lot of power in cooling my home. i also found out that L.E.D lights are vervy energy efitiont but they cost more than $20 and are too expensive to ues in the home.

what action i',m going to take as a resolt of this task
i am only going to try to ues the lights less and try to keep all the doors closed when the AC is on, also i will try not to ues the AC as much and ues some fans insted.

Energy @ Home Project

This term in Science, our grade has done a project on Energy in our homes. This project allowed us to analyse our enrgy consumption in detail. In the asssignment, we looked at how energy is transferred and transformed in the home, how energy is lost in the home and how to improve energy-efficiency in the home.

What I have learned in this project is how to read an electricity meter, how to correctly identify different light bulbs, and how to research accurately and create a report.

This will help me in the futuure for when I have to run a home myself. This has also helped me to set out my time much more evenly in order to complete an assignment. This project will be one of my milestones for life.

Energy At Home Science Project

The energy at home science project was very interesting, and heped me create new understandings. I learnt that lightbulbs aren't just lightbulbs. There are LED's, Halogens, Incandescents and many more, and all have a different impact on the environment. Just the section on lightbulbs made me more aware on what changes my family should make, and I am now making suggestions on what would save them more money and use less power.

Checking all the star ratings of my appliances made me much more aware of my family's power use. My washing machine is only 1 star out of 6, making it extremely inefficient. My dishwasher is only 2.5 stars out of 6, so it uses a lot of power. My fridge is 3 stars out of 6, so it is kind of efficient, and kind of inefficient. These appliances should all be replaced, ideally with 4 or 5 star machines. Replacing them would reduce energy use, and the power cost.

I also learnt that little things can make a big difference. For instance, on a sunny summer day I could leave most of the lights off, because if I leave them on the air conditioner would have to work harder because of the extra heat radiated from the lights. Making sure all lights are off and all power switches are turned off before I leave home could also make a significant difference.

This project has made me SOO much more aware of my family's energy use. I am now trying to make a difference, in my family's energy use, my family's energy cost and the environmental impact. And it's all thanks to this Energy At Home Science Project!

Science at home reflection

This will probably be my final post jp7numeracy blog because in 2 and a half days I will no longer be in year 7. Over the past month we have been doing a research task on energy around the house. It covered transfering and transforming energy around the home, how energy is lost in the home and which ways we can save energy around the home. This helped my family understand how much energy little things in the house waste.

I am now going to pull out all my appliances that are on standby or are not being used. I am also going to turn off lights in rooms that are not being used. My family has not changed their views on electricity usage at all, sadly.

Science at Home Reflection

This term in science our class has been working on a booklet called Energy at Home. From going through this booklet i have learnt how my family is wasting energy and using energy in the household. This has been benificial to my family, we have now chosen more energy efficient appliances and have changed our lifestyle to save money.

Reflection- Science @ home booklet

Semester 2 Term 4, in Science we got a assignment that was a little different to other assignments. We got handed out a booklet that we had to work on at home. We had to fill in the blank spaces. The knowledge I got out of this booklet was incredible. By the knowledge I gained, I used it on the report. It was really helpful, i think i did very good in this task. I learnt many things that i never heard of before.

Energy @ Home Reflection

While doing the Energy at home booklet, I learnt many things. I learnt about more efficient ways to use energy at home such as for lighting, heating and cooling. I learnt about energy efficient lightbulbs like the fluorescent bulb and I also learnt about the energy star rating on appliances. I also learnt about conduction, convection and radiation in the home. Something I also learnt is the different things that can be installed to prevent energy that is wasted and to improve energy efficiency in the home such as solar panels or whirly birds.

Something I gained from this is knowledge on the use of energy at home. I gained information on the different types of ways that energy is used and wasted at home and how to prevent a lot of this happening. I also gained experience from doing the experiments.

With the information I have learnt, I will take into consideration the energy star rating and buy an appliance with a high rating. Also, I will install energy efficient devices in my house such as solar panels and a whirly bird to cut back on energy costs. I will also change the incandescent lghtbulbs to more efficient forms of lighting like fluorescent lights.

Energy @ Home Reflection

After completing the Energy @ Home project, I have gained much knowledge which I can use to reduce our energy usage costs.

I have learnt a lot about kilowatts, our energy usage in a day, light bulbs, ways to reduce energy costs, and energy star ratings.

I can use this knowledge around my house and in the school. At home, I plan to promote the ideas of getting roof insulation and a solar energy system. At school, I can remember to turn off unused lights and other appliances.

Overall, this was a worthwhile project and a learnt many things.

Energy @ Home

During this term we have been working on an energy @ home project, that involved reading electricity meters, researching different lightbulbs and the conductivity of kitchen appliances. I gained much knowledge from these topics. From the knowledge I have gained my family and I will change some behaviors like: turning off appliances at the wall and closing doors when the air conditioner or heater is running. As a result of this task we have replaced 15 incandescent lightbulbs to compact fluroscent bulbs.

Energy at home project

Over the past couple of weeks we have been doing a home project about energy. I have learnt a lot during this project. If you want to save energy and money you should turn off your power points. You can turn off your appliances by the wall and not leave the them on standby. You should turn off your television if you are not watching it.

I also learnt that my washing machine uses a lot of energy, it has a rating of 1 star. To save more energy you could hang your clothes outside instead of using a dryer. You could take shorter showers because it would use energy to heat up your water. You could only use your dishwasher if it full. A better way to wash your dishes is to hand wash them. You could try not to use the air conditioner, if your house hot you can open a window or if it's cold you can put on a jacket. This project has made me more aware of how much energy we are wasting.

My Reflection

This term we did a science at home avidity and I have learnt allot from this project. I have learnt that my house waists allot of energy and I need to do something about it. I have also learnt that I should replace the light bulbs in my room to LED because they use less energy and electricity. I should also close my windows, doors and close my curtains, when the air conditioning is on. This has really helped me learn more about energy and how I can be a better person at saving energy.

Energy @ home booklet

During science we had to complete a booklet to learn and be more aware of energy effieciency in our house that we live in. During this I learnt that our home isnt very energy effiecient as the lowest rating was 1 and the highest was 2 and a half. I also learnt how energy is lost through lighting which is '' the electric power to lights is converted to heat. Unless special arrangements as local cooling or air outlets through the lighting equipment are used this is what will happen.

Those are the main things I learnt we also learnt about different types of lights and how they work and how to read an energy meter.

Energy at home reflection

From this energy booklet I have found many different ways to use energy efficiantly. Without this knowledge I would not of been able to shar it, because now I know what level our energy usage is at now I can keep an eye on it which I have been doing, I have been checking it every two days making sure we are not using to much. I have learnt many things like:

Renewable and non-renewable sources= Tidal power, Wind power, Wood, Hydroelectricity, Radiant energy, Geothermal energy, biomass and compressed natural gas. Some Non-renewable are Coal, Oil, Gas and Nuclear energy.

How energy is lost: Well for a T.V energy is lost through the screen, energy is lost basically when you turn something either by a powerpoint or switch or anything but yeah

So I have learnt alot from this energy booklet, well not just me bbut now that my family is awaye of how our energy is going we can now see if we need to swap for better efficiancy.

Science at home reflection

During this assignment I have learnt a variety of things. I have learnt how much energy our household uses, which light bulbs are most energy efficient, which sources are renewable and non- renewable and how main appliances in our household waste so much energy.

I found that we should replace some appliances such as our fidge and washing maching, as the star rating was very low. I also established that we use much more energy during weekends, rather than weekdays. This showed in our meter readings, as during weekends the results wre much higher.

A way we could reduce our energy use is turning things off when not in use, not leaving things on standby, changing light bulbs and using natural rather than turning on lights and changing light bulbs.

I learnt more about light bulbs and found that in our household we use halogen and fluorescent light bulbs. I learnt that halogen light bulbs can get really hot and that fluorescent light bulbs are very efficient. But even though they are energy efficient they contain mercury, so we have to dispose of it well.

The Greatest Card Trick in the world

I posted this because it relates to the card unit and probability unit in the maths dimensions book.

Pretty cool Card trick!

Renewable and Non-renewable sources

Renewable sources of energy is Tidal power, Wind power, Wave power, Wood, Hydroelectricity, Radiant energy, Geothermal energy, biomass, Compressed natural energy and Nuclear power. Some Non-renewable sources are Coal, Oil, Gas and Nuclear.

What is the most efficient light bulb and why

The new compact fluorescent light bulbs (CFLs) use significantly less electricity when used. This is mainly because CFLs produce a lot less heat compared to incandescent light bulbs, and the generation of heat is basically the loss of energy. Even though CFLs are more expensive than incandescent light bulbs, if it believed that CFLs are more cost effective when factoring in their longer life spans and lower energy consumption. If this is true, then there is no need to ban the traditional incandescent light bulbs; because the free market will automatically obsolete the least cost effective type of light bulb. The only problem with CFLs is that they contain an extremely toxic substance called mercury. If a single CFL breaks, then it could be very costly to clean up.

how is energy lost

Well for heating and cooling it would be through our windows, the T.V looses energy through the screen because the monitor on the T.V that uses and needs the energy the most and even light bulbs because almost half of its energy is half wasted through heat energy. No when energy goes away it is only being changed into matter. EX: gasoline can be used to create certain gases and electricity. Energy is being created from matter. Then the electricity is used to give power to a lamp. The electricity is being converted into heat and light energy.

Energy Efficient Lightbulbs

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Today in class we spoke about the transfer of energy. To demonstrate this, we completed a prac where we popped corn in a pop corn maker. The use of heat and how it was transferred was visible. Hope you like the video clip!

Radiation

how come we cannot see radiation and how does it work?

i learnt how a hot water system works!

Conduction, Convection and Radiation

Radiation

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Heat that travels through invisible waves is called radiation

Question

Today we had a test and it was easy and here is a small test for you to understand one of the questions...

Question

what is convection?


what is conduction?

Convection

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The spread of heat due to the movement of particles in liquids and gasses is called convection

Different transfers of heat

There are three main types of heat transfers.

Conduction: This occurs when particles in one part of an object are heated, causing them to vibrate. These vibrations are then passed from particle to particle throughout an object. Solids are generally good conductors of heat because the bonds between the particles are small. They are constrained together.

Convection: This is the spread of heat from one place to another due to the movement of particles in liquids and gases. The liquids and gases transfer their heat in convection currents. These currents work when the warm air rises, and the cooler, denser air flows quicky to take its spot.

Radiation: This occurs when heat energy travels through invisible waves and it does not need materials to travel through.

Transference of Heat

There are 3 ways to transfer heat-

Conduction: the passage of energy, particularly heat or electricity, through something.

Conduction is the transference of heat through the vibration of particles in a material

Convection: the circulatory movement in a liquid or gas, resulting from regions of different temperatures and different densities rising and falling in response to gravity.

Convection is the transference of heat through the movement of particles in a material

Radiation: energy emitted from a source in the form of waves or rays

The transference of heat through a space by visible rays or waves that don not need a material to travel through

Conduction

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Conduction is the transfer of energy through matter from particle to particle due to vibration of a particle as it is heated

What is Radiation?

Radiation

Radiation describes the process of which energetic particles or waves travel through a material or space.

Ionizing radiation

Ionizing radiation is radiation with sufficiently high energy that can ionize atoms. Most often, this occurs when an electron is knocked out from an electron shell, which leavs the atom with a net positive charge.

There are five types of ionizing radiation:

1. Alpha
   
2. Beta(+/-)


3. Gamma


4. X-Ray


5. Neutron

Non-Ionizing radiation

Non-ionizing form of radiation on living tissue have only recently been studied. instead of producing charged ions when passing through matter, the electromagnetic radiation has sufficient energy to charge only rotational, vibrational or electronic configurations of molecules and atom.

There are five main Non-Ionizing Radiation forms:

1. Visible light
2. Infrared
3. Microwave
4. Radio Waves
5. Thermal Radiation
   
   

Class Prac

Today we discovered that black cans trap heat more than white cans and I thought that it was quite interesting.

Soaring Summer Costs

How I did my kinetic energy in sound energy experiment

Hey Team,

A lot of people have asked during school me how I did my kinetic energy in sound energy experiment with my laptop and speakers and did different noises and the speakers played it at the same time so I decided to post the instructions (note: this will only work in windows 7 and you will need a microphone if you don't have one already built-in):

First hold the speakers' sound hole up-right facing the top (or just tape it)

Plug in the speakers

Right click the speaker icon in the task bar and click 'Recording devices' and then click the microphone you want and click the 'Properties' button on the bottom of the window and go on the 'Listen' tab and tick the box 'Listen to this device'.

Put a little ball or a light object that is smaller than the hole itself. Start making noise and observe the speaker.

Bye for now.

Light Bulbs Explanation

This is a great video that we were shown in class.

It helped me with a lot of the Energy at Home project.

The video explains the three main types of light bulbs:

Incandescent

Fluorescent

Light Emitting Diodes

Hope this helps!

What is Potassium?

A few days ago we did a prac with potassium. When it was heated in the water it suddenly turned into a pinkish smoke. Potassium is a major mineral that is highly important to the human body. It is an electrolyte, which means it carries electrical currents. It isin most people's diets, so most healthy people have a large amount in their intake. It is also found in foods such as bananas, strawberries and fish.

What is convection?

convection is the movement of molecules within liquids and gases. It cannot take place in solids, since niether bulk current flows nor significant diffision can take place in solids.

Kinetic energy in Sound energy

Hello Everyone,

This is the video of kinetic energy in sound energy. Last night, I had nothing to do so I was just thinking about my science lessons in class this week and my teacher had been talking to us about kinetic energy in sound energy and how it works if a light object is put on top of an up-right speaker. We didn't do the experiment in class so i just decided to do it from the speakers I found in my wardrobe. So I just did the experiment with my laptop, the speakers and a piece of Lego.

So First I tried with my hands just simply tapping the microphone and then i smashed a roll of duck tape against the desk and then I tried my guitar and randomly strummed it.

Questions + Answers = 9.6

Q1. Explain why the particles moved the way they did in this experiment?
A1. The heat supplied to the bottom o the beaker by the bunsen burner causes heat to be transferred to the water and dissolving potassium permanganate above the heating point. The water and potassium permanganate particles gain energy and spread out, which decreases their density, this means that they start to rise upwards. As they get further away from the heat source, however, they start to cool and the particles move closer together. The density increases an dthey sink again. This flow of warm water rising and cool water sinking causes the convection.
Q2. This investigation modelled heat transfer by convection. Outline the benefits of modelling concepts in science?
A2. Models are helpful in providing an insight into an effect which is very difficult to see under normal circumstances.
Q3. Are convection currents modelled accuretly in this investigation? What limitations are there to modelling concepts in science?
A3. A variety of responses are possible.

Questions + answers = 9.5

Q1. What evidence is there to suggest that heat travelled along the rods?
A1. The wax melted only because the moved from one end of the rod to the other.

Q1. Through which rod did heat travel the fastest?
A1. The copper rod.
Q3. Which rod is the poorest conductor of heat? What evidence do you have for this conclusion?
A3. The glass rod is the poorest conducter of heat; the wax on the glass rod was the last to be heated.
Q4. Why was it important to put the blobs of wax the same distance from the bunsen burner?
A4. So that the time until melting is affected by the speed of energy conduction and not the distance from the bunsen burner.

OUR CLASS EXPERIMENT DID NOT WORK VERY AFFECTIVELY!!!!

Questions + answers = 9.4

Q1. which material, air or water, expanded more rapidly?
A1. The level in the tube indicates the temperature of the water; the higher the temperature, the higher the level in the tube.
Q2. Which material would make the more sensitive thermometre?
A1. When the water is heated, the water particles vibrate more quickly and the distance between them increases and the volume gets larger. The water in the tube is contrained in how much it can expad sideways, so the increase in volume leads to an increase in the water level. Conversely, when the water is cooled the water particles vibrate less rapidly and the spaces between the particles become smaller, which leads to a decrease.

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1. Explain how the equipment used in this experiment could be used as a thermometer
2. Use the particle model to explain what happens to the level of the water when the flask is heated and cooled.

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1. Explain why the particles moved the way they did in this experiment.
2. This investigation modelled heat transfer by convection. Outline the benefits of modelling concepts in Science.
3. Are convection currents modelled accurately in this investigation? What limitations are there to modelling concepts in Science?

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What is your solution? How did you solve it?
Edwin wanted to improve his typing so he practised and tested himself regularly. His mean typing speed after nine tests was 38·5 words per minute. What speed would he need in the next test to increase his average to 40 words per minute?

If you rub your head on a balloon you make energy :)

Mean

The mean is the average of a group of numbers altogether.

For eg.

1,4,6,3,7,9,

Add them together, so

= 30

Then divide it by the amout of numbers, in this case it is 6, so:

30/6 = 5

The average number is 5.

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We went to the lab and completed the prac below found in Science World Chapter 12.1. The class has a ball completing this prac despite having to cremate some Tiny Teddy biscuits. Great insight into how we get energy from food. We also burnt some apricot slice and rice crackers. No pics or vid taken - sorry :(

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Line graph

I learnt that line graphs are a very good way to display data about the increase and decreases over a period of time.

Graphing

Today we learnt about Graphs and how to interpret line graphs.

If you wanted to compare the temperature in May from October, you would need to find out the two different temperatures:

May: 22 Degrees C

October: 24 Degrees C

=24-22

=2 Degrees

So therefore October is two degrees warmer than May.

You could interpret it as October warmer than May, or May Colder than October.

What we learnt

In science today we learnt about converting energy and transferring energy. Also, we learnt about Renewable energy.

Transferring Energy= This is transfer one form of energy from one place to another

Conservation= This is when you convert energy from one form to another

There is the same amount of energy in the whole world. You are just converting it into different forms. It is like the game of monopoly, the players are exchanging money (transferring) with others, but the total amount of money will always stay the same.

Renewable energy is basically recycling energy and is most reliable because it can be used over and over again. For example, a wound up toy can be wound up many times because it recycles energy.

Kinetic and Potential Energy

We have started the term in Science talking about Kinetic and Potential Energy. Here is a table which categorises each type of energy as either Kinetic or Potential.

energy (elastic)

What is Energy?

Get a Voki now!

Potential and Kinetic Energy

The sum of GPE+KE is constant

For example, a tennis ball is hit into the air so therefore GPE+KE is constant. If you calculate the two energies and add them together, you will receive the same answer (neglecting air friction).

Potential Energy

Potential energy is stored energy. For example, gravitational potential energy is stored energy due to a mass being a certain height above reference level.

GPE= mgh is the equation for calculating gravational potential energy

m= mass (kg)

g= 9.8 (metres per second squared)

h= height (m)

Kinetic Energy

Kinetic energy is the energy that an object contains due to its motion. The speed of Kinetic energy is much less than the speed of light. Energy as a whole is categorized into two classes: Potential energy and Kinetic Energy. Kinetic energy can be found in the game of billiards, the player gives kinetic energy to the cue ball by striking it with the cue stick. Therefore, kinetic energy is the energy that an object possesses due to its motion.

One of the fundamental laws of physics says that energy cannot be created or destroyed, but it can be converted from one form to another.

Conversion is explaining that from motion energy(Kinetic energy) is converting into a other form of energy example potential.

Potenial energy is energy that can be use like magnetic, gravitional, chemical, electrical, elastic and nuclear. The picture of fireworks shows chemical energy.

Motion energy(Kinetic energy) is any moving object that users kinetic energy. Like heat, light, sound and kinetic energy.

The sun shows energy of heat.

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The Universe is very big place but we can only see a certain parts of it it contains the Pegasus cluster, Virgo cluster, local group (we live in the local group), Centaurs cluster, Fornax cluster, Hydra cluster.
Cluaters are massive groups of galaxies bucked to gather it may contain anything to a few dozen to few thousand. That might sound a lot but it mostly believed to be made of darkmatter.

Sun Song!

Visit: Sun Song

It's really cool. It gives you lots of information in a really fun way... a song!

A Black hole is a region from space from which nothing, not even light can escape from it. The Black Hole in the middle of the Milky is more than 4 million solar masses.
Black holes are the evolutionary endpoints of stars at least 10 to 15 times as massive as the Sun. The term black hole can also be called Neutron Star. Karl Schwarzschild was credited with being the astronomer who developed the concept of the black holes.

http://ffden-2.phys.uaf.edu/212_fall2003.web.dir/Daniel_Barnes/Page2.htm http://en.wikipedia.org/wiki/Black_hole
http://library.thinkquest.org/C0110369/Where.htm http://whyfiles.org/052einstein/frame_drag3.html http://imagine.gsfc.nasa.gov/docs/science/know_l2/black_holes.html http://www.astronomycafe.net/qadir/q1808.html

Galaxies are massive amounts of stars gathered together reaching up to 10 million to 1 trillion. Galaxies are also made up of gas. There are many different types of galaxies in all diferent shapes and sizes. Like the spirals galaxies, elliptical, lenticular, irregular galaxies and more.

Our galaxy is a spiral galaxy and it called the milky way. The closes galaxy to use is called the Andromeda galaxy it is also a sprial galaxy. It is 2.5 miollion years away from us.

Dark matter is believe to be the solution to the missing mass problem. Dark matter is believed to take up most of the Unvirse. Dark matter was firsted propesed by a man named Frizt Zwicky in 1933. He was observing a cluster of galaxies when he notice he was moving faster around thier centre of gravity point, based on their mass. He worked out that the galaies had to be 400 times in their mass at the rate thatv they were moving, this is called the missing mass problem.

Many other scientist have proposed other solution to tis problem but they all have same characteristics.

White Holes

A white hole is made up of matter and is basically the other end of a black hole and things that get sucked in must emerge but not enter.
White holes are formed like black holes, from a large star and this is basically by the star blowing up.

T.Pyxiis, a massive explosive white Dwaf star in a bainary star system with a sun-like star in our milky way Galaxy. T. Pyxidis could have exploaded 3260 Light years agoto 1,000 parsecs (1 parsec = 3.26 Light-Years) ago but NO ONE knows because of the distance time delay. if the star exploads it will be equivalent to 20 billon billon billon megatons of TNT. Dward plen has had a increase of mass witch could lead to it exploading.

THE SUNS

vy canis mojoris is the biggest sun ever discoverd it is located in the milky way and is a red hyper giant. scientist are still studing how big these sun can get vy canis majoris was discoverd in the 17th cenury by jerome lalande. the most lomense star ever discoverd was lbv 1806-20 it would light the earth for tens and thousand of years. imagine this vy canis majoris could fit earth 70 qaudrillion times.