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Science Sec 3 > Energy > Flashcards

Energy Flashcards

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Biology 101 flashcards
1
Q

What is energy?

A

The ability to do work, to move or cause change in matter

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2
Q

What are the two types of energy?

A

Kinetic and potential

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3
Q

What is unit is energy measured in?

A

Joules

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4
Q

What is the equation for energy?

A

Work = Force x Distance

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5
Q

What is potential energy?

A

Stored energy in an object dure to position

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6
Q

What determines the measure of potential energy?

A

Height and mass

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7
Q

The ___________ an object, the greater its potential energy

A

Higher

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8
Q

The amount of _________ stored is related to the amount of stretch applied

A

Energy

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9
Q

What is kinetic energy?

A

The energy formed or caused by motion

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10
Q

What determines the measure of kinetic energy?

A

Speed/velocity and mass

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11
Q

The ____________ an object moves, the greater it’s kinetic energy

A

Faster

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12
Q

What is the law of conservation of energy?

A

Energy can’t be created or destroyed. It doesn’t disappear, it is just transformed from one form to another.

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13
Q

What are the forms of potential energy?

A

Mechanical, chemical, nuclear and electrical

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14
Q

What are the forms of kinetic energy?

A

Mechanical, radiant, electrical, thermal and sound

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15
Q

What is kinetic mechanical energy?

A

The energy a body possessed because of its motion caused by gravity or elasticity

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16
Q

What is potential mechanical energy?

A

The energy a body possessed because of its position

17
Q

What is thermal energy?

A

Heat energy

The movement of particles that are constantly in motion

18
Q

What is radiant energy?

A

Solar or light waves. Energy caused by the movement of electromagnetic waves

19
Q

What is sound energy?

A

Energy in the form of wave motion (vibrating matter)

20
Q

What is kinetic electrical energy?

A

Moving electrons from one point to another in a conductor

21
Q

What is potential electrical energy?

A

Stored electrons not moving

22
Q

What is chemical energy?

A

Energy stored in chemical substances or combounds

23
Q

What is nuclear energy?

A

Atomic energy. The energy stored in the nucleus of an atom

24
Q

What is the crest?

A

Highest point on a wave

25
Q

What is the trough?

A

Lowest point on a wave

26
Q

Do waves have more energy when they have shorter lengths or longer lengths?

A

Shorter wave lengths

27
Q

What’s a physical change?

A

The substance looks different, but its nature hasn’t been changed. No new substances are formed

28
Q

What are the 3 types of physical changes?

A

Phase Change, dissolution and deformation

29
Q

What happens when energy is added to a gas, liquid or solid?

A

The particles do not change, just the force of attraction between them

30
Q

What happens when energy is added to a liquid?

A

When you heat a liquid, you add energy. The particles absorb this energy, which makes them move faster and faster, changing the force of attraction between them

31
Q

What’s dissolution?

A

Dissolving a solute and solvent to make a solution by storing them to combine

32
Q

What happens with energy in dissolution?

A

some substances either release energy (exothermic reaction)or absorb energy (endothermic reaction)

33
Q

What’s deformation?

A

Changing the shape

34
Q

What happens when two or more substances react in a chemical change?

A

They make something new (product)

35
Q

What are th 4 indicators of a chemical change?

A

1) change in colour
2) formation of gas
3) formation of a precipitate
4) generation of light

36
Q

Where does cellular respiration in the body occur?

A

Mitochondria

37
Q

What does the mitochondria take in during cellular respiration and what does it release?

A

It takes in glucose and oxygen

It releases CO2, water and energy

Science Sec 3 (11 decks)

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