energy unit 9 of fusion science grade 4

energy unit 9 of fusion science grade 4

By khatima yasir

where energy comes from?

1)energy comes from movement.​

2)energy comes from food.

3)energy comes from action of forces.etc

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​energy makes changes

what is energy?

energy is the ability to cause change in matter.​

human's energy comes from eat. they need food to perform action.

human gets energy from trees & animals.​

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human needs energy from food​

​human energy

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kinetic means: motion

> the study of human muscle movement.​

kinetic energy​

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potential means: ability of doing something but not done yet.​

​potential energy

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mechanics means​:deals with motion of bodies and how forces act on them.

mechanical energy​

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Multiple Choice

energy means _______

• ability to cause change in matter.

• ability to cause movement in object

• ability to face the object

• ability to destruction

Multiple Choice

energy word comes from Greek words (en + ergon) means:

• have movement

• make motion

• on duty

• in work

Multiple Choice

what types of energy is there when ball is at rest in plyground?

• no energy

• potential energy

• mechanical energy

• kinetic energy

Multiple Choice

what type of energy occur when we kick the ball in the playground?

• have energy

• kinetic energy

• mechanical energy

• potential energy

Multiple Choice

sum of

kinetic energy + potential energy

knows

• mechanical energy

• powerful energies

• kinetic-potential energies

• addition energy