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
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.
Use words from the box to complete the diagram.
| land, inner core, rock, crust, mantle, ocean, outer core |
The Earth is very old. Name the evidence that scientists need when estimating the age of the Earth.
Describe how scientists study the structure of the Earth when they cannot reach the centre of the Earth.
Fossils are often found in limestone but not marble. Which statement is an incorrect explanation?
