Energy Quiz

Question 1

why was energy difficult to describe

Answer 1

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

Question 2

what is chemical energy

Answer 2

potential energy stored in the chemical bonds of compounds

Question 3

how is chemical energy released

Answer 3

through the breaking of chemical bonds

Question 4

what is energy

Answer 4

the ability to do work

Question 5

what is energy the same as

Answer 5

work

Question 6

what is electrical energy

Answer 6

work done by moving charges

Question 7

how was electrical energy discovered

Answer 7

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

Question 8

what is nuclear energy

Answer 8

the potential energy stored in a nucleus of an atom

Question 9

how is nuclear energy released

Answer 9

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

Question 10

how does solar energy result

Answer 10

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

Question 11

how does radiant energy from the sun travel to the earth

Answer 11

as electromagnetic radiation

Question 12

whats motion energy called

Answer 12

kinetic energy

Question 13

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

Answer 13

kinetic energy and gravitational potential energy

Question 14

why can kinetic energy be observed in nature

Answer 14

because any object in motion can be made to do work

Question 15

why can gravitational potential energy be observed in nature

Answer 15

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

Question 16

what is the sum of motion and position energy known as

Answer 16

mechanical energy

Question 17

what is heat

Answer 17

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

Question 18

what is potential energy

Answer 18

the energy that is stored or held in readiness

Question 19

what is weight

Answer 19

measure of the force of gravitational attraction on an object

Question 20

why does the mass of an object never change

Answer 20

because the amount of matter the object possesses is constant

Question 21

what does the weight of an object depend on

Answer 21

the acceleration due to gravity

Question 22

what happens if a force is used to stretch an elastic

Answer 22

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

Question 23

whats elastic potential energy

Answer 23

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

Question 24

what is elastic potential energy an example of

Answer 24

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

Question 25

when is potential energy useful

Answer 25

when it is converted into some other form of energy

Question 26

what is chemical potential energy

Answer 26

the energy found in chemicals

Question 27

whats kinetic energy

Answer 27

energy associated with the motion of an object

Question 28

whats mechanical energy

Answer 28

energy due to the motion and the position of an object

Question 29

what does the law of conservation of energy

Answer 29

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

Question 30

what does the law of conservation of energy show

Answer 30

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

Question 31

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

Answer 31

motion, change in shape, change in temperature

Question 32

how do hydroelectric dams work

Answer 32

they convert the energy from moving water into electricity

Question 33

how does a coal-burning power station work

Answer 33

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

Question 34

how does nuclear energy work

Answer 34

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

Question 35

how does solar energy work

Answer 35

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

Question 36

how does a hydrogen fuel cell operate

Answer 36

like a battery

Question 37

how does a hydrogen fuel cell work

Answer 37

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