Lithosphere, volcanoes and hydrosphere
Answers are for parents and teachers.
1
If a plate moves 6 cm a year, how many centimetres does it move in 50 years?
300
2
A sound pulse sent down returned after 8 s. What is the depth in metres? (1500 m/s)
6000
3
How do you protect yourself in a school classroom during an earthquake? Write three rules.
Move away from windows, take cover under a sturdy desk or by an inside wall, protect the head, stay calm and listen to the teacher.
4
Write the difference between magma and lava in one sentence and describe the soda-and-vinegar experiment with its safety rules.
Magma is underground, lava is on the surface. The experiment needs eye protection, adult supervision, working on a tray and no tasting.