Do Now1. Energy is the ability to do work.2. Does space have energy? Even though space is cold and dark, it is flooded by ___ . All stars in the universe produce ___ . Planets and ___ reflect that energy back, glowing in the darkness. Also everything in space is in ___ , so there is also kinetic energy.

electromagnetic energyenergy moons

motion

Do Now1. Energy is the ability to do work.2. Does space have energy (stars, planets, moons)?

Stars burn up, moons glow bright and planets rotate and revolve around the Sun.

Do NowEnergy is the ability to do work.Energy can be found in many things, and takes many forms.

1. The two factors that affect kinetic energy are ___ and ___ .

2. List the object that has the greatest KE when rolled, diet cola or regular cola. Explain.

3. The two factors that affect potential energy are ___ and ___ .

4. Where at home would you put an AC to have the greatest PE?

mass speed

Regular cola becausethe greater the mass, the higher the KE.

mass height

The greater the height, atticthe higher the PE:

Do Now

1. In Gizmo, we found out that the energy in the pendulum is fast at point ___ (bottom swing) and slows down at points ___ and ___ (upswing).

2. This type of change where energy goes from one form, ___ energy (pts A and C) to another form ___ energy (pt B), and where energy is never lost is called “the principle of ___ of energy”.

1. In Gizmo, we found out that the energy in the pendulum is fast at point ___ (bottom swing) and slows down at points ___ and ___ (upswing).

B

A C

2. This type of change where energy goes from one form, ___ energy (pts A and C) to another form ___ energy (pt B), and where energy is never lost is called “The Principle of ___ of Energy”.

potentialkinetic

Conservation

KE

PE PE

Do Now1. List in sequence that shows an increase in kinetic energy. 2. List in sequence that shows an increase in potential energy.

Top to bottom: A, G, B, F, C, E, D

Bottom to top: D, E, C, F, B,G, A

Do Now1. Explain how the motion of a swing

illustrates the transferring of energy between potential and kinetic energy.

When the pendulum is on an upswing, the potential energy ___ . When the pendulum swings down the ___ changes to ___.At the downswing, the ___ is increases.When the pendulum swings up, the ___ changes to ___.

increasesPE

KEKE

KEPE

Do Now1. How can a pebble on a hill have the same potential energy as a stone?

2. Explain what happens to the kinetic energy of a skateboard that is coasting along a flat surface, slows down, and comes to a stop.

Same PE: pebble on a hill = stone at ground level

2. Explain what happens to the kinetic energy of a skateboard that is coasting along a flat surface, slows down, and comes to a stop.

The KE of the skate is converted into thermal energy by friction.

Do Now1. ___ is what we call energy that comes from heat. 2. What happens when you pour milk into hot chocolate? The hot chocolate becomes ___ because it lost ___ to the milk.

Thermal energy

cooler thermal energy

3. Identify all forms of energy as the girl sweats from jumping rope.

3. Identify all forms of energy as the girl sweats from jumping rope.

a. As the rope swings up- b. As the rope swings down-c. The girl becomes hot- d. The girl starts to sweat-

KEPE

chemical energythermal energy

A swimming pool at 30°C is at a lower temperature than a cup of tea at 80°C. But the swimming pool contains more water, so it stores more thermal energy than the cup of tea.

To boil water we must increase its temperature to 100°C. It takes longer to boil a large beaker of water than a small beaker because the large beaker contains more water and needs more thermal energy to reach 100°C.

Do Now

1. How can a swimming pool of 75 degrees F have the same thermal energy as a cup of hot coffee at 100 degrees F?

2. Which takes longer to boil, a large or a

small beaker of water?

Because the pool store more thermal energy.

It takes longer to boil the large beaker becauseit takes more water and needsmore thermal energy to reach its boiling point.

Do now1. Draw a Venn diagram and write the two factors that affect each form of energy.

KE PE Thermal energy

Do Now-1. When heat is removed, molecules ___ .2. When heat is added, molecules ___ .

contract (come together)

expand (spread out)

3. Which picture shows that heat is added ?

Glass molecules become hot and then expand

Glass molecules become cooler and then contract

4x. Which picture shows that heat is added?

Iron molecules become hot and then expand

Iron molecules become cooler and then contract

5x. Why is the jar lid easier to open after using hot water?

The hot water increases the thermal energy of the metal lid and therefore makes it expand and loosen up.

6. However, water has a unique property:when water becomes cold, the molecules ___ and when water becomes hot, the molecules ___ .

expand

contract

In freezer At room temperature

7. We can see that glass breaks as water molecules ___ when it freezes .expand

In freezer

1. ___ is energy stored in bonds of chemical compounds (atoms and molecules).

2. Chemical energy is released in a chemical reaction, often in the form of ___ .

Chemical energy

heat

3. Identify which are examples of chemical energy. Write the word “chemical energy” or “not” after each statement.

a. Matchstick is litb. Plants convert sunlight into sugarc. Water freezing into iced. A person breathinge. Melted wax

=chemical energy=chemical energy

=chemical energy

“Nature of E” worksheet

16a. Chemical energy-b. Thermal energy-c. Light energy-

18. Radiant energy-

WORD BANK (five words):19. Radiant Chemical Thermal PE KE

20a. (three answers)-b. (one answer)-c. (two answers)-d. (one answer)-e. (two answers)-f. (two answers)-g. (two answers)-

Do now1. ___ is the process in which sunlight is converted by chemical energy to make sugars for survival.

Photosynthesis

2. Photosynthesis takes place in the ___ which is located on the underside of the leaves. Each dot is a chlorophyll.

chlorophyll

3. ___ is also located in plant and animal cells. 4. It uses a lot of ___ in order to make each cell grow and operate normally.

Mitochondria

chemical energy

Worksheet to chemical energy

label and colorchloroplasts and mitochondria

Label four parts: stroma, outer membrane, lamella and granum

Light blue

Dark green

brown

Light green

Label two parts: thylakoid and granum

red

green

Label three parts: matrix, outer membrane, cristae

red

yellow

pink

1. Plant cells2. Sugar3. Photosynthesis4. Carbon dioxide and water5. carbon dioxide and oxygen6. 7. thousands

Do Now

1. Identify the different types of energy that you saw in the video.

a. Kinetic Energy=b. Potential Energy=c. Thermal Energy=d. Chemical Energy=

Crossword puzzle: (three words not used)kinetic KineticEnergychemical ChemicalEnergythermal ThermalEnergypotential PotentialEnergyheight moleculeshotter conservationhigher expandspeed contractmass oxygenchloroplasts transferredmitochondria transformed

1. Identify the different types of energy that you see in space.a. Kinetic Energy= rotating planets, meteorite crashed down, spaceship lifting up, astronauts floating in space

b. Potential Energy= the sun stays still, the spaceship was still before it lifted

c. Thermal Energy= the hot sun, rocket fuel burning, the stars burning actually, volcanoes erupting on Venus

d. Chemical Energy= rocket fuel evaporates into gas, the crater burns into ash, astronauts inhale oxygen and exhale co2

Do Now-

1. Identify the different types of energy that has been applied before you came to this class.

a. Kinetic Energy=b. Potential Energy=c. Thermal Energy=d. Chemical Energy=

1. Identify the different types of energy that has been applied before you came to this class.a. Kinetic Energy=a boy shaking his bookbag. I am walking to school. I was kicking a ball in gym.

b. Potential Energy=a person falling his seat. Standing on the roof. Im standing in line at lunch time.c. Thermal Energy=the school oven is turned on. I feel cold air from the vent. Running in gym class, I get hot.d. Chemical Energy=the light bulb burns. Foam comes from wet soap. Cooked pizza

1. Identify the different types of energy that has been applied before you came to this class.a. Kinetic Energy= the car moving, when we are walking to class, talking to friends

b. Potential Energy= sitting on a chair, slept on my bed, the Great Wall of China project displayed in the hallway

c. Thermal Energy= drinking hot cocoa for breakfast, my bed is warm, the heat in the car as you are driving to school

d. Chemical Energy= my breakfasted digested in my stomach, I was breathing in oxygen and breathing out CO2, the car gasoline burns into smoke

Nature of Energy, pg 716

23. At high speed, both cars have more KE. This greater KE will result in more damages.

24. The chemical energy in the wood is transformed into thermal energy and radiant energy.25. Chemical energy is converted into thermal energy by your body.

26. The vase with the larger mass would have more PE.

27. The golf ball has less mass so it must be moving faster.

27a. If they move at the same speed, the bowling ball has more KE.

1. D2. A3. D4. A5. G6. F7. C 11. A8. B 12. D 9. E 13. A 10. E 14. D

Do Now1. What forms of energy do the chloroplasts in the plant leaves undergo? Explain.

Potential energy = The plant stays still.Kinetic energy = The leaves of plants move

towards the sunlight.Thermal energy = The sun’s rays heats up the

plant.Chemical energy = The rays are converted to

food for the plant by photosynthesis