Energy

Question 1

energy

Answer 1

the ability to cause change

Question 2

kinetic energy

Answer 2

energy in the form of motion

Question 3

the amount of kinetic energy an object has depends on its…

Answer 3

mass and velocity

Question 4

joule (J)

Answer 4

the SI unit used to measure energy

Question 5

potential energy

Answer 5

energy stored in a motionless object, giving it the potential to cause change (position)

Question 6

elastic potential energy

Answer 6

energy stored by things that stretch/compress

Question 7

chemical potential energy

Answer 7

energy stored in chemical bonds between atoms

Question 8

gravitational potential energy

Answer 8

energy stored by things that are above the earth

Question 9

the amount of GPE an object has depends on its…

Answer 9

mass, acceleration due to gravity, and height

Question 10

energy conversions

Answer 10

energy changing from one form to another

Question 11

fuels store energy in the form of…

Answer 11

chemical potential energy

Question 12

mechanical energy

Answer 12

the total amount of potential and kinetic energy in a system

Question 13

law of conservation of energy

Answer 13

energy can’t be created or destroyed, it can only change form

Question 14

as a swing moves back and forth…

Answer 14

its energy converts itself from kinetic to potential and back

Question 15

as energy from a swing decreases…

Answer 15

the energy of some other object must increase by the same amount

Question 16

friction converts some ________________ ___________ into __________ __________

Answer 16

mechanical energy, thermal energy

Question 17

nuclear fusion

Answer 17

two nuclei are fused together, takes place in the sun

Question 18

nuclear fission

Answer 18

two nuclei are broken apart

Question 19

the food calorie is used to measure…

Answer 19

how much energy various foods give us

Question 20

1 calorie =

Answer 20

4180 J

Question 21

different forms of energy

Answer 21

radiant, thermal, chemical, electrical

Question 22

energy changes form when…

Answer 22

energy moves from one place to another

Question 23

relationship (variables) in KE equations

Answer 23

mass increases = KE increases
velocity increases = KE increases

Question 24

relationship (variables) in GPE equations

Answer 24

height increases = GPE increases
same height = larger mass object would have more GPE

Question 25

KE and GPE at the same time

Answer 25

an object that were to fall and begin moving

Question 26

devices converting electrical energy into other forms of energy

Answer 26

ex) lightbulbs - warmth around bulb proves some thermal energy + electrical energy transformed into light

Question 27

13 (checklist)

Answer 27

bus moving (chemical energy) - chemical potential energy is found in the gasoline. the engine transforms that into kinetic energy.

Question 28

14 (checklist)

Answer 28

green plants convert light energy into chemical potential energy by storing in between chemical bonds

Question 29

energy transformations of pendulum system

Answer 29

see drawing