1. 8th Grade Exploring Energy

2. EQ: How can energy create a change?

3. Ball still does not bounce back.
Height Ball is Dropped from
Ball A
Ball B
10 cm
Ball hits the ground and bounces up and down about 13 times losing height each time until it begins to roll and stops.
Ball hits ground with a thud and stays there. It does not bounce back. It does not even roll.
30 cm
Ball hits the ground and bounces higher than it did at 10 cm but never as high as the dropping height. It bounces about 16 times before beginning to roll to a stop.
Ball still does not bounce back.
It seems like it is stuck to the ground when it hits.
1. Ball A and Ball B are made of different materials Because Ball A bounced and Ball B did not

4. Substance
Volume (cm³)
Mass (g)
Density=mass/volume(g/cm³)
Ball A
9cm³
8.0 g
0.89g/cm³
Ball B
11.0 g
1.22g/cm³
2. The balls are not made up of the same material. The two substances do not have the same densities.

5. D C E B A

6. Explain
Potential Energy is greatest in position D
Kinetic Energy is lowest in position D
Kinetic Energy is greatest in position E
C Position has slightly more potential energy than position B

7. Elaborate:
____________ is defined as the ability to do work or cause change. While it can be______________from one object or system to another, energy cannot be_________ or destroyed.

8. Elaborate:
Energy is defined as the ability to do work or cause change. While it can be ____________ from one object or system to another, energy cannot be ________ or destroyed.

9. Elaborate:
Energy is defined as the ability to do work or cause change. While it can be transferred from one object or system to another, energy cannot be ________ or destroyed.

10. Elaborate:
Energy is defined as the ability to do work or cause change. While it can be transferred from one object or system to another, energy cannot be created or destroyed.

11. This rule is known as the law of _____________of energy
This rule is known as the law of _____________of energy. Energy exists in several different ______.

12. This rule is known as the law of conservation of energy
This rule is known as the law of conservation of energy. Energy exists in several different______.

13. This rule is known as the law of conservation of energy
This rule is known as the law of conservation of energy. Energy exists in several different forms.

14. One form of energy, thermal energy, is produced by the movement of atoms, ions and molecules.

15. The more the ________ of an object move, the greater the thermal energy will be.

16. The more the particles of an object move, the greater the thermal energy will be.

17. Thermal energy can be transferred as _____ from warmer objects to ________ objects. When this transfer occurs, the _____________ of both objects will change.

18. Thermal energy can be transferred as heat from warmer objects to ________ objects. When this transfer occurs, the _____________ of both objects will change.

19. Thermal energy can be transferred as heat from warmer objects to cooler objects. When this transfer occurs, the _____________ of both objects will change.

20. Thermal energy can be transferred as heat from warmer objects to cooler objects. When this transfer occurs, the temperature of both objects will change.

21. Other forms of energy include: Electrical energy which is produced by the flow of electrons, _________ energy stored in the bonds of molecules, ____ energy which travels as electromagnetic waves, sound energy which travels as _________ waves, __________ energy which comes from the fission (splitting apart) or fusion (combining) of the nuclei of atoms, and mechanical energy which is used by _________ objects.

22. Other forms of energy include: Electrical energy which is produced by the flow of electrons, chemical energy stored in the bonds of molecules, ____ energy which travels as electromagnetic waves, sound energy which travels as _________ waves, ________ energy which comes from the fission (splitting apart) or fusion (combining) of the nuclei of atoms, and mechanical energy which is used by _________ objects.

23. Other forms of energy include: Electrical energy which is produced by the flow of electrons, chemical energy stored in the bonds of molecules, light energy which travels as electromagnetic waves, sound energy which travels as ___________ waves, ________ energy which comes from the fission (splitting apart) or fusion (combining) of the nuclei of atoms, and mechanical energy which is used by ________ objects.

24. Other forms of energy include: Electrical energy which is produced by the flow of electrons, chemical energy stored in the bonds of molecules, light energy which travels as electromagnetic waves, sound energy which travels as mechanical waves, nuclear energy which comes from the fission (splitting apart) or fusion (combining) of the nuclei of atoms, and mechanical energy which is used by ________ objects.

25. Other forms of energy include: Electrical energy which is produced by the flow of electrons, chemical energy stored in the bonds of molecules, light energy which travels as electromagnetic waves, sound energy which travels as mechanical waves, nuclear energy which comes from the fission (splitting apart) or fusion (combining) of the nuclei of atoms, and mechanical energy which is used by moving objects.

26. Mechanical energy is the sum of _____________ energy and kinetic energy. Potential energy is ____________________ energy due to an objects position.

27. Mechanical energy is the sum of potential energy and kinetic energy
Mechanical energy is the sum of potential energy and kinetic energy. Potential energy is _______________energy due to an objects position.

28. Mechanical energy is the sum of potential energy and kinetic energy
Mechanical energy is the sum of potential energy and kinetic energy. Potential energy is stored energy due to an objects position.

29. For example, water behind a dam has potential energy due
to its ability to fall to a lower level. Potential energy is converted into ________________, or the energy of
motion.

30. For example, water behind a dam has potential energy due
to its ability to fall to a lower level. Potential energy is converted into kinetic energy, or the energy of
motion.

31. When energy moves from one object to another it is often ____________ into a different form of energy. For example, electrical energy is transferred to the light bulb of a lamp where it is transformed into light energy and ___________ energy (heat).

32. When energy moves from one object to another it is often transformed into a different form of energy. For example, electrical energy is transferred to the light bulb of a lamp where it is transformed into light energy and ___________ energy (heat).

33. When energy moves from one object to another it is often transformed into a different form of energy. For example, electrical energy is transferred to the light bulb of a lamp where it is transformed into light energy and thermal energy (heat).

34. Another example can be found in a moving car
Another example can be found in a moving car. Chemical energy from the gasoline is transformed into mechanical energy when the car moves. This transformation is not 100% _______, which means that much of the energy is transformed into thermal energy and cannot be used to move the car.

35. Another example can be found in a moving car
Another example can be found in a moving car. Chemical energy from the gasoline is transformed into mechanical energy when the car moves. This transformation is not 100% efficient, which means that much of the energy is transformed into thermal energy and cannot be used to move the car.

36. Identify the forms of energy that occur in each stage of energy transformation when a coal fired power plant supplies electricity to a street light 1 2 3 4 5
Burning Coal
Boil Water
Turn Turbine
Goes to power line
Lights Street lamps

37. Identify the forms of energy that occur in each stage of energy transformation when a coal fired power plant supplies electricity to a street light
1 Chemical 2 3 4 5
Burning Coal
Boil Water
Turn Turbine
Goes to power line
Lights Street lamps

38. Identify the forms of energy that occur in each stage of energy transformation when a coal fired power plant supplies electricity to a street light
1 Chemical
2 Thermal 3 4 5
Burning Coal
Boil Water
Turn Turbine
Goes to power line
Lights Street lamps

39. Identify the forms of energy that occur in each stage of energy transformation when a coal fired power plant supplies electricity to a street light
1 Chemical
2 Thermal
3 Mechanical 4 5
Burning Coal
Boil Water
Turn Turbine
Goes to power line
Lights Street lamps

40. Identify the forms of energy that occur in each stage of energy transformation when a coal fired power plant supplies electricity to a street light
1 Chemical
2 Thermal
3 Mechanical
4 Electrical 5
Burning Coal
Boil Water
Turn Turbine
Goes to power line
Lights Street lamps

41. Identify the forms of energy that occur in each stage of energy transformation when a coal fired power plant supplies electricity to a street light
1 Chemical
2 Thermal
3 Mechanical
4 Electrical
5 Light
Burning Coal
Boil Water
Turn Turbine
Goes to power line
Lights Street lamps