Unit 4: Earth and its habitats

What shape is the Earth?

What does the surface of the Earth consist of?

What might be underneath the surface?

Use the particle model to describe how the solid white ice in the Earth view becomes blue water. What is this change called?

What provides the energy that makes the polar ice change into water?

Describe the external structure of a peach.

Does the cut peach show external or internal structure?

Name the two layers of the peach’s internal structure.

Complete every blank in the partially filled table for the Earth’s crust, mantle and core. The table already gives: crust = solid; mantle thickness = 3000 km; core material = iron and nickel; core temperature = 5000–6000°C.

Is a whole peach a good model of the whole Earth? Explain strengths and limits.

Which peach parts represent the crust, mantle and inner core?

How is the cut peach a good or bad model of Earth’s internal structure?

Give an example of how scientific information about Earth’s structure changes over time.

Why is it very hot in a deep mine?

What is the layer below Earth’s crust called?

What material does this layer contain?

Describe this material.

Point out lava that is still flowing in the scene.

Point out lava that has cooled and hardened into rock.

Compare the exterior volcano photograph with the labelled cross-section. Which features can be seen in both?