Energy

Question 1

What are the 8 energy stores?

Answer 1

Thermal, chemical, magnetic, gravitational potential, elastic potential, kinetic, nuclear, electrostatic

Question 2

When something falls, energy is transferred between which two of its energy stores?

Answer 2

GPE -> Kinetic

Question 3

How do you know when an object gains kinetic energy?

Answer 3

It increases in speed/velocity.
(kinetic energy of particles also increases when heated)

Question 4

How do you know when an object gains gravitational potential energy?

Answer 4

It increases in height.

Question 5

How do you know when an object gains elastic potential energy?

Answer 5

The shape changes

Question 6

In which ways can energy be transferred?

Answer 6

Heating, Electrical, Radiation, Mechanical

Question 7

Explain conduction.

Answer 7

• When an object is heated, the particles in the part of the object being heated begin to vibrate more and collide with each other.
• These collisions energy to be transferred between the particles’ kinetic energy stores.
• This process continues throughout the object.

Question 8

define conduction.

Answer 8

when vibrating particles transfer energy to neighbouring particles.

Question 9

Define convection.

Answer 9

Where energetic particles move away from hotter to colder regions.

Question 10

Explain convection

Answer 10

• when a liquid or gas is heated, the particles closest to the heat source gain energy and become less dense causing them to rise to the top of the gas/liquid
• Particles from these cooler areas will move to the hotter area (creating a convection current).