The Changing Earth
Plate tectonics, the fossil record, and evidence for how Earth and its climate have changed.
9 questions, free, marked as you go with a worked explanation on every one.
What this covers
- plate tectonics and rock layers
The questions
- What drives the movement of tectonic plates?
- What evidence first suggested that South America and Africa were once joined?
- What does the fossil record show about life on Earth?
- Why are deeper rock layers usually older than those above them?
- Which are used as evidence of past climate? Select all that apply.
- What happens at a subduction zone?
- Two tectonic plates are moving apart from each other at a rate of 4.5 cm per year, measured by satellite. If that rate stays the same, how much farther apart will the two plates be after 2 000 years, in metres?
- A piece of wood buried in a river terrace is tested and found to hold one eighth of the carbon-14 that living wood of the same kind holds. The half-life of carbon-14 is 5730 years. How old is the buried wood?
- Use the table. Which rock layer is the oldest?