Matter And Energy

Question 1

What can NOT happen to energy

Answer 1

Created or destroyed

Question 2

What is the unit of measurement for energy

Answer 2

Joules

Question 3

What is meant by energy store.

Answer 3

A way in which a system stores energy

Question 4

What happens to the energy store when energy is transferred out of it

Answer 4

The store empties

Question 5

What happens to an energy store when energy is transferred into it

Answer 5

It fills up

Question 6

Name four important energy pathways

Answer 6

Heating, radiation, mechanical working and electrical working

Question 7

What energy store fills when energy is dissipated

Answer 7

The thermal energy of the surroundings

Question 8

What is the term for energy that hasn’t been useful to device or process.

Answer 8

Wasted energy (dissipated energy)

Question 9

What is the name of the energy store with fuels and food

Answer 9

The chemical store

Question 10

Stretching a rubber band fills which store

Answer 10

Elastic potential store

Question 11

What must an object do to fill its kinetic store

Answer 11

It must move

Question 12

When an apple falls from the tree what store is being filled

Answer 12

The gravitational potential store

Question 13

When a bow string is being pulled back what energy store is being filled

Answer 13

The elastic store of the bow

Question 14

The movement of particles inside an objects is the source of which store

Answer 14

Thermal store

Question 15

When an object is heated what happens to the particles

Answer 15

Vibrate /move faster

Question 16

What instrument can be used to measure how hot an object is

Answer 16

Thermometer

Question 17

If hot object is put in contact with a cold object in which way would the energy transfer

Answer 17

From the hotter object to the colder object

Question 18

What unit do we measure temp in

Answer 18

The degree Celsius

Question 19

Thermal energy can transfer between a hot and cold object in 3 ways what are they

Answer 19

Conduction, convection and radiation

Question 20

Which of the 3 states of matter is best at transferring energy by conduction

Answer 20

Solid

Question 21

Which way of transferring thermal energy happens only in liquids and gas

Answer 21

Convection

Question 22

What is meant by the term radiation

Answer 22

When energy is transferred as a wave

Question 23

What is the name of the invisible radiation given off by a warm object such as a human being

Answer 23

Infra-red radiation

Question 24

What is the name given to a stream of fluid which rises due to heating and falls when it cools

Answer 24

A convection current

Question 25

Eventually 2 objects which are in contact will reach the same temp. What is the final situation called

Answer 25

Thermal equilibrium

Question 26

How does energy get transferred by conduction

Answer 26

Vibrating particles pass energy along to their neighbours

Question 27

What is necessary for conduction and convection but not for radiation

Answer 27

Particles