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Science 10 > Energy Quiz > Flashcards

Energy Quiz Flashcards

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1
Q

why was energy difficult to describe

A

because it involves only an abstract idea, not a material object

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2
Q

what is chemical energy

A

potential energy stored in the chemical bonds of compounds

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3
Q

how is chemical energy released

A

through the breaking of chemical bonds

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4
Q

what is energy

A

the ability to do work

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5
Q

what is energy the same as

A

work

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6
Q

what is electrical energy

A

work done by moving charges

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7
Q

how was electrical energy discovered

A

when a magnet was moved through a could wire and it was observed that this caused an electrical current to flow through the wire

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8
Q

what is nuclear energy

A

the potential energy stored in a nucleus of an atom

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9
Q

how is nuclear energy released

A

when the nucleus of an atom is split or when the nuclei of two atoms combine

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10
Q

how does solar energy result

A

from a hydrogen-hydrogen nuclear fusion reaction with the release of nuclear energy within the sun

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11
Q

how does radiant energy from the sun travel to the earth

A

as electromagnetic radiation

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12
Q

whats motion energy called

A

kinetic energy

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13
Q

what are the two types of energy that can be observed in nature

A

kinetic energy and gravitational potential energy

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14
Q

why can kinetic energy be observed in nature

A

because any object in motion can be made to do work

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15
Q

why can gravitational potential energy be observed in nature

A

because any object raised above earth’s surface has the potential to do work because of is position

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16
Q

what is the sum of motion and position energy known as

A

mechanical energy

17
Q

what is heat

A

the transfer of thermal energy from a hot object to a cold object

18
Q

what is potential energy

A

the energy that is stored or held in readiness

19
Q

what is weight

A

measure of the force of gravitational attraction on an object

20
Q

why does the mass of an object never change

A

because the amount of matter the object possesses is constant

21
Q

what does the weight of an object depend on

A

the acceleration due to gravity

22
Q

what happens if a force is used to stretch an elastic

A

the force acts against the elastic force of the material resulting in a change in shape

23
Q

whats elastic potential energy

A

energy stored in elastic materials as a result of their stretching or compression

24
Q

what is elastic potential energy an example of

A

work being done by applying a force through a distance gainst an opposing force which results in an energy transfer to the object and the energy being stored in the object as potential energy

25
Q

when is potential energy useful

A

when it is converted into some other form of energy

26
Q

what is chemical potential energy

A

the energy found in chemicals

27
Q

whats kinetic energy

A

energy associated with the motion of an object

28
Q

whats mechanical energy

A

energy due to the motion and the position of an object

29
Q

what does the law of conservation of energy

A

that the total amount of energy in a given situation remains constant

30
Q

what does the law of conservation of energy show

A

that energy can be converted from one form to another, but the total amount of energy never changes

31
Q

what are the 3 pieces of evidence that an energy conversion has occurred

A

motion, change in shape, change in temperature

32
Q

how do hydroelectric dams work

A

they convert the energy from moving water into electricity

33
Q

how does a coal-burning power station work

A

converts the chemical potential energy in the coal to heat, which turns water into steam that turns a turbine to produce electricity

34
Q

how does nuclear energy work

A

uranium disintegrates during nuclear fission in the reactor which releases energy as radiation, which heats water into steam that turns a turbine to produce electricity

35
Q

how does solar energy work

A

electrons are bound up in silicon crystals that get energy to break free when hit by sunlight, creating current

36
Q

how does a hydrogen fuel cell operate

A

like a battery

37
Q

how does a hydrogen fuel cell work

A

it converts the chemical energy in a fuel into electrical energy, creating by-products of heat and water

Science 10 (13 decks)

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