Energy transformations
Light Energy
Sound energy
Thermal energy
EM spectrum
100

Give 3 examples of kinetic energy 

Sound, light, mechanical, thermal, electrical

100

Define reflection

Light bouncing off a surface 
100

What is the difference between compression and rarefaction

Compression: area where particles are close together 

Rarefaction: area where particles are further apart 

100

Is thermal energy kinetic or potential energy 

Kinetic 

100

What does the word spectrum mean 

Going between two extremes 
200

Give three examples of potential energy

Gravitational, elastic, chemical, nuclear, electric 

200
Define refraction

Light bending through a surface 

200
How is a higher pitch seen in a sound wave

Higher frequency 

200

What are the three types of thermal energy transfer 

Conduction, convection and radiation

200

Which part of the electro magentic sprectum can we perceive 

Visible light

300

What is the unit of energy

Joule 

300
What is the difference in how light behaves when moving through a convex vs concave lens?
Convex lens: light converges to a focal point 

Concave lens: light diverges 

300

How is loudness seen in a sound wave 

Larger amplitude 

300
If you burn your hand on a metal pan as you take it out of the oven, which form of heat transfer are you experiencing? 

Conduction

300

Which colour on in visible light has the highest frequency

Violet 

400

Describe how coal was formed, and the energy transformations that have occured 

Solar light energy was transferred to chemical energy through photosynthesis in forests 300 million years ago. These forests were buried and compressed over time to create an energy rich rock that can be burned for fuel
400
What is the speed of light 

300 million metres per second 

400

What part of the ear converts sound energy to mechanical energy?

The ear drum 

400
Which type of heat transfer describes how cold air from the air conditioner eventually cools down a hot room 

Convection

400

Compare the frequencies of infra red and ultraviolet 

Infrared has lower frequency than visible light, ultraviolet has higher. 

500
What is the equation for energy efficiency? Give an example of an energy inefficient system 

(useful energy/ total energy) x 100

For example, when a ball bounces, it loses height with each bounce. The height is lost to sound and heat 

500

What are three differences between sound and light 

1. Light travels much faster 

2. Light travels in transverse waves, sound is longitudinal waves 

3. Sound cannot travel through empty space, light can 

500

Define longitudinal wave 

The oscillations move in parallel to the direction of the wave's movement 
500

Why would it be preferable to use a wooden spoon over a metal spoon when stirring a pot of soup on the stove? 

Wood is an insulator, and will not conduct the heat to your skin, while metal is a conductor which will 

500

At what speed do gamma rays travel?

Speed of light

M
e
n
u