FINAL QUIZ

Question 1

What are some ways to increase the strength of an electromagnet?

Answer 1

1. More coils
2. Higher current

Question 2

Why does light bend in glass prism?

Answer 2

1. White light consists of many different colours
2. Different coloured light have different speeds and are refracted by different amounts

Question 3

Induction: What happens to the reading of the voltmeter when a magnet is inserted into a solenoid?

Answer 3

It is deflected

Question 4

Refraction can be described as…

Answer 4

1. Bending of light
2. Light enters a medium of different density
3. Light rays change speed

Question 5

Galaxies contain millions of…

Answer 5

stars

Question 6

Dams have thicker walls at the bottom because…

Answer 6

pressure in liquids increase with depth/water pressure increases with depth

Question 7

What is a force that stops objects from moving on a surface?

Answer 7

Friction

Question 8

Extra energy used to overcome friction is transformed into…

Answer 8

Heat energy, thermal energy

Question 9

Is cobalt magnetic?

Answer 9

Yes

Question 10

What are the benefits of using electromagnets instead of permanent magnets?

Answer 10

1. Can be turned off
2. Adjustable strength

Question 11

What gasses from burning fossil fuels causes climate change?

Answer 11

Greenhouse gasses

Question 12

What are some examples of non renewable energy?

Answer 12

Fossil fuels
Nuclear energy