Energy changes in systems

Question 1

What are the 8 energy stores ?

Answer 1

Kinetic 
Thermal
Chemical
Gravitational potential
Elastic potential
Electrostatic
Magnetic
Nuclear

Question 2

What is a system ?

Answer 2

A system is an object or a group of objects

Question 3

What is a Closed System ?

Answer 3

systems where neither matter or energy can enter or leave.

Question 4

What happens when a system changes?

Answer 4

Energy is transferred

Question 5

What is kinetic energy ?

Answer 5

An object moving

Question 6

What is thermal energy ?

Answer 6

When object heats up

Question 7

What is chemical energy ?

Answer 7

Anything that can release energy by a chemical reaction

Question 8

What is Gravitational potential energy ?

Answer 8

An object which is raised above ground level

Question 9

What is elastic potential energy ?

Answer 9

Anything stretched for example springs or rubber bands

Question 10

What is electrostatic energy ?

Answer 10

2 charges that attract or repel each other

Question 11

What is magnetic energy ?

Answer 11

2 magnets that attract or repel each other

Question 12

What is nuclear energy ?

Answer 12

The nucleus of an atom releases energy from this store in nuclear reactions

Question 13

how can energy be transferred mechanically ?

Answer 13

This happens when a force does work on an object

Question 14

How can energy be transferred electrically?

Answer 14

This happens when a moving object does work

Question 15

How can energy be transferred by heating ?

Answer 15

When energy is transferred from a hotter to a colder object

Question 16

How can energy be transferred by radiation ?

Answer 16

This is transferred by sound or light

Question 17

What is power ?

Answer 17

Power is the rate at which energy is transferred or the rate at which work is done

Question 18

What is internal energy ?

Answer 18

Internal energy is the energy stored in a system by the particles