Unit 7: Energy. Energy Resources. Law of Conservation of Energy: Energy is neither created or...

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Unit 7 : Energy. Energy Resources. Law of Conservation of Energy: Energy is neither created or destroyed

Transcript of Unit 7: Energy. Energy Resources. Law of Conservation of Energy: Energy is neither created or...

Page 1: Unit 7: Energy. Energy Resources. Law of Conservation of Energy: Energy is neither created or destroyed.

Unit 7: Energy. Energy Resources.

Law of Conservation of Energy:

Energy is neither created or destroyed

Page 2: Unit 7: Energy. Energy Resources. Law of Conservation of Energy: Energy is neither created or destroyed.

Unit 7: Energy. Energy Resources. Let’s try a problem from the study guide!

44) A 25 kg ball is at rest on a balcony on Earth that is 30 m high. A cat knocks the ball off of the balcony. After falling down 10 m, what is its kinetic energy?

Hint: Use the Law of Conservation of Energy

25 kg Ball

30 m

20 m

10 m

0 m

Answer: 2,450 J

http://www.google.com/url?sa=i&rct=j&q=cat+on+balcony&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRw&url=http://images.mooseyscountrygarden.com/gardening-journals/garden-journal-09/60/&ei=lxNRVaDHBPLasASbvoHgAQ&psig=AFQjCNFPItAkz24YJHL3TorYIpUEnK5MIw&ust=1431463188787478
Page 3: Unit 7: Energy. Energy Resources. Law of Conservation of Energy: Energy is neither created or destroyed.

Unit 7: Energy. Energy Resources.

** In every energy conversion, some energy is always converted into

thermal energy (because of friction)!

http://www.google.com/url?sa=i&rct=j&q=roller+coaster+hill&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRw&url=http://zaderollercoaster.wikispaces.com/&ei=uRFRVdf5CaTksATSv4CYAw&bvm=bv.92885102,d.cWc&psig=AFQjCNEOKN5xBaDtr0cG8aVNjvEcdKuwng&ust=1431462698945976
http://www.google.com/url?sa=i&rct=j&q=roller+coaster+hill&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRw&url=http://thedavidmanly.com/category/roller-coasters/&ei=6hFRVdyeDZTLsAT1qoGwAw&bvm=bv.92885102,d.cWc&psig=AFQjCNH47PsEBZPbssYmNf-sHoixQolIww&ust=1431462760050132
Page 4: Unit 7: Energy. Energy Resources. Law of Conservation of Energy: Energy is neither created or destroyed.

Unit 7: Energy. Energy Resources.

Where does all this energy come from?!

Nonrenewable Resources: cannot be replace after they are used (or can only be replaced over

thousands or millions of years)

Nuclear Energy

Fossil fuels: Coal, petroleum, natural gas

Page 5: Unit 7: Energy. Energy Resources. Law of Conservation of Energy: Energy is neither created or destroyed.

Unit 7: Energy. Energy Resources.

Where does all this energy come from?!

Renewable Resources: can be used and replaced in nature over a relatively short period of

time

WindSolar Geothermal BiomassWater

Page 6: Unit 7: Energy. Energy Resources. Law of Conservation of Energy: Energy is neither created or destroyed.

Unit 7: Energy. Energy Resources.

Energy Poster & Debate(10 point summative)

Your job is to work as a group and create a poster that shows why your energy resource is the best choice!

You will be graded on… 1) Design (make it look pretty)

2) Explain how energy is produced from your resource

3) Highlight at least 3 ADVANTAGES! 4) On the back of your poster make notes on why your resource is better

than the competitor! You will need this for your debate next class!

Textbook pages 232-237 and Course Pack pages 41-54 are helpful

http://www.google.com/url?sa=i&rct=j&q=law+of+conservation+of+energy&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRw&url=http://www.clf.org/blog/clean-energy-climate-change/vermont-yankee-closing-advocacy-activism-kept-pressure-aging-plant/&ei=wxJRVc6FCenIsQSstoGYCw&psig=AFQjCNEzEP9pOcTS2ynYxI95ypZTXl0ckA&ust=1431462976018295
http://www.greenepta.org/the-cougar-spot-school-store.html

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