Year 8 Science · Unit 3 · Lesson 20
Foundation Worksheet
Learning Goals
True or False? Fix the false ones
Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.
The outer core is solid because it is so hot that the iron is compressed into a solid state.
Correct it:
S-waves cannot pass through the outer core because the outer core is liquid.
Correct it:
The mantle is made of solid rock that cannot move at all.
Correct it:
Oceanic crust is thicker than continental crust.
Correct it:
Match each term to its definition
Draw a line connecting each term on the left to its correct definition on the right. Or write the matching letter next to each term.
| Term | Your answer | Definition |
|---|---|---|
| Inner core | A. The outermost layer of Earth, divided into oceanic and continental types. | |
| Outer core | B. A wave of energy from an earthquake; P-type travels through solids and liquids. | |
| Mantle | C. Solid iron-nickel at Earth's centre; solid due to immense pressure despite ~5000°C. | |
| Continental crust | D. Liquid iron-nickel layer that generates Earth's magnetic field. | |
| Oceanic crust | E. The thick semi-solid rock layer between the crust and outer core; flows slowly over millions of years. | |
| Seismic wave | F. Denser, thinner type of crust (~5–10 km) found under the ocean. |
1. Starting from the surface, list Earth's four layers in order from outermost to innermost and give the state of matter for each.
2. Why does density increase as you go deeper into Earth?
Wrap Up
In one sentence, what was the main idea of this lesson?