1. Review for Energy Test

2. The formation of rust is a                change.

3. Evaporation of water is a                change.

4. Tearing paper in strips is                 change.

5. A firecracker popping is                 change.

6. Which is an example of a chemical change?
a balloon that is blown up.
Ice melting.
paper burning
a metal pan heating on the stove

7. Which is an example of a physical change?
Metal rusting.
Silver tarnishing.
Water boiling.
Paper burning.

8. Burning a match is a
chemical change
physical change
chemical property
physical property

9. Which of the following is an example of a physical change?
Mixing baking soda and vinegar together causes bubbles and foam.
A glass cup falls from the counter and shatters on the ground.
The paper burns up and leaves ashes.
Baking a birthday cake for your mother.

10. Which of the following is an example of a chemical change?
Filling up a balloon with hot air.
Taking a glass of water and freezing it by placing it in the freezer.
A plant collecting sunlight and turning it into food.
Your dog ripping up your homework.

11. A flashlight changes energy from chemical into ___________.
thermal
sound
electrical
mechanical

12. Potential energy is the energy an object has because of its _____________.
speed
position
size
density

13. A car or truck moving down the highway has _______ energy by virtue of its motion.
kinetic
potential
thermodynamic
chemical

14. The energy possessed by matter due to its motion is ___________.
potential energy
kinetic energy
static energy
none of the above

15. A toy robot can walk and talk and runs on batteries
A toy robot can walk and talk and runs on batteries. What type of energy is stored in the batteries?
chemical
kinetic
nuclear
thermal

16. Which type of energy is a form of electromagnetic energy?
chemical
light
nuclear
sound

17. Israel observed a bolt of lightning during a storm
Israel observed a bolt of lightning during a storm. Which form of energy does a bolt of lightning produce?
electromagnetic
mechanical
nuclear
potential

18. Inside the sun, hydrogen atoms combine to form helium atoms
Inside the sun, hydrogen atoms combine to form helium atoms. This process releases light and warmth. Which form of energy powers the sun?
electromagnetic
mechanical
nuclear fusion
thermal

19. A group of sheep are grazing in a field
A group of sheep are grazing in a field. As they eat, the sheep break down the molecules in the grass, which releases energy. Which form of energy is stored in the grass?
chemical energy
elastic energy
nuclear energy
thermal energy

20. Gordon throws a baseball into the air
Gordon throws a baseball into the air. It rises, stops when it reaches its greatest height, and then falls back to the ground. At what point does kinetic energy convert to potential energy?
when the baseball is rising
when the baseball is falling
just after the baseball hits the ground
while the baseball is stopped in the air.

21. Which energy conversion takes place when a toaster is switched on?
chemical to sound
electrical to sound
chemical to thermal
electrical to thermal

22. Give an example for each type.
Kinetic energy____________________________________
Nuclear energy___________________________________
Potential energy__________________________________
Heat energy______________________________________

23. Give an example for each type.
Thermal energy_______________________________
Chemical energy_____________________________
Electric energy_______________________________
Electrochemical energy_______________________