HARD
Lower Secondary Stage 7
IMPORTANT
Earn 100

Slate is often used as a building material because it is strong, waterproof and resistant to weather. Suggest a reason why slate has these properties.

Important Questions on The Earth

HARD
Lower Secondary Stage 7
IMPORTANT

Millie and Islay are investigating some soil samples. They want to find out how much humus is in each sample. Millie thinks that they must dry the soil first before heating it but Islay disagrees. Who is correct? Millie or Islay? Explain your answer.

MEDIUM
Lower Secondary Stage 7
IMPORTANT
Why do many farmers think that loam is the best type of soil for growing crops? 
MEDIUM
Lower Secondary Stage 7
IMPORTANT
In what type of rock are fossils most commonly found? 
MEDIUM
Lower Secondary Stage 7
IMPORTANT

Use words from the box to complete the diagram.

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land, inner core, rock, crust, mantle, ocean, outer core
MEDIUM
Lower Secondary Stage 7
IMPORTANT

The Earth is very old. Name the evidence that scientists need when estimating the age of the Earth. 

HARD
Lower Secondary Stage 7
IMPORTANT

Describe how scientists study the structure of the Earth when they cannot reach the centre of the Earth. 

MEDIUM
Lower Secondary Stage 7
IMPORTANT

Fossils are often found in limestone but not marble. Which statement is an incorrect explanation?