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7P To Pass Summatives 💞💞💞 > Science💛-Energy > Flashcards

Science💛-Energy Flashcards

1
Q

What is energy?

A

Energy is the ability to do work or cause change.

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2
Q

True or False: Energy can be created or destroyed.

A

False. Energy cannot be created or destroyed, only transformed.

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3
Q

Fill in the blank: The unit of energy is __________.

A

Joule

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4
Q

What is kinetic energy?

A

Kinetic energy is the energy of an object due to its motion.

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5
Q

What is potential energy?

A

Potential energy is the stored energy of an object due to its position or state.

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6
Q

Calculate the kinetic energy of a 2 kg object moving at 3 m/s. (Use KE = 1/2 mv^2)

A

The kinetic energy is 9 Joules.

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7
Q

What is the formula for gravitational potential energy?

A

The formula is PE = mgh (mass x gravity x height).

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8
Q

True or False: The total energy in a closed system remains constant.

A

True.

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9
Q

What type of energy is associated with the position of an object?

A

Potential energy.

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10
Q

What type of energy is associated with the motion of an object?

A

Kinetic energy.

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11
Q

What is the law of conservation of energy?

A

Energy cannot be created or destroyed, only transformed from one form to another.

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12
Q

Fill in the blank: The energy stored in food is an example of __________ energy.

A

Chemical

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13
Q

What is thermal energy?

A

Thermal energy is the total kinetic energy of particles in a substance.

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14
Q

What is the main source of energy for the Earth?

A

The Sun.

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15
Q

True or False: Energy can only exist in one form at a time.

A

False. Energy can exist in multiple forms simultaneously.

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16
Q

What is mechanical energy?

A

Mechanical energy is the sum of kinetic and potential energy in an object.

17
Q

What type of energy do batteries store?

A

Chemical energy.

18
Q

What is the formula to calculate kinetic energy?

A

KE = 1/2 mv^2.

19
Q

Fill in the blank: The energy of a stretched or compressed spring is called __________ energy.

A

Elastic

20
Q

What does the term ‘energy transfer’ refer to?

A

The movement of energy from one place or object to another.

21
Q

What is sound energy?

A

Sound energy is the energy produced by vibrating sound waves.

22
Q

What is an example of renewable energy?

A

Solar energy.

23
Q

What is an example of non-renewable energy?

A

Coal.

24
Q

True or False: All forms of energy can be converted into one another.

A

True.

25
Q

What is nuclear energy?

A

Nuclear energy is the energy released during nuclear fission or fusion.

26
Q

What is the main purpose of energy in living organisms?

A

To perform biological processes necessary for survival.

7P To Pass Summatives 💞💞💞 (9 decks)

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