Grade 4 Questions

Ullswater Community College

Q1.

(a) When light travels from air to glass, it changes direction.

What is the name of this effect? ........................................................

(b)

1 mark

The diagram below shows three rays of light A, B and C striking a glass block.

The paths of A and B have been drawn.

Continue ray C to show its path through the block and out the other side.

Use a ruler.

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2 marks

Ullswater Community College

(c)

The diagram below shows three rays of light, D, E and F, from a torch placed under water.

The path of ray E is shown as it leaves the water and enters the air.

Continue the paths of D and F as they pass through the air.

Use a ruler.

2 marks maximum 5 marks

Q2.

Neera and Tom dissolved different masses of salt in 500 cm3 of water.

They measured the temperature at which each salt solution boiled.

(a)

They wrote down the variables that might affect the investigation.

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Ullswater Community College

(i)

What is the independent variable (the variable they changed) in their investigation? ...............................................................................................................

(ii)

What is the dependent variable (the variable they measured) in their investigation? ...............................................................................................................

(iii)

Neera and Tom plotted their results and drew the graphs shown below.

(i)

1 mark

Which variable above would affect the experiment the least? ...............................................................................................................

(b)

1 mark

How can you tell from the graphs that Neera and Tom started with pure

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1 mark

Ullswater Community College

water? ............................................................................................................... ...............................................................................................................

(ii)

1 mark

Why is Tom’s line of best fit better than Neera’s line of best fit? ............................................................................................................... ...............................................................................................................

1 mark maximum 5 marks

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