SATs - Science Exercise 1 - Physical Sciences Answers

Physical Sciences - Answers

The Earth

Put a circle around the correct answer:

The Earth orbits the sun once a
year	day	month	minute

The Earth spins on its axis once every
year	day	month	minute

Is the sun a planet or a star?
planet	star

Magnets

John has three magnets - a horseshoe magnet, a bar magnet and a round magnet. He wanted to see which was the strongest. Describe a simple experiment that John could do.

Use this as a guide to help you:

Materials used.
Method

Answer example:
Title: Experiment to test the strength of three magnets.
Materials used:
3 magnets - horseshoe, bar and round. Steel pins or paper clips.
Method:
Place pins or paper clips in a pile.
Put magnet close to objects.
Count how many objects each magnet attracts.
Record answers in a table.

Here is John's results table

magnet number of objects held

horseshoe 5

bar 9

round 7

According to John's results: -

Which is the strongest magnet?
The bar magnet

Explain why you think this is the strongest magnet

The bar magnet attracted the most objects.

In his first experiment, John used plastic paper clips. Explain why this experiment did not work.
Magnets do not attract plastic. They attract metal

objects made mainly of iron or steel.

Circuits

What's wrong with this circuit?

It is not a complete circuit. The wire is only attached to the negative terminal of the battery. There should be a connection between the bulb and the positive terminal of the battery.