- What keeps the Earth’s core hot?
- Do we live on Earth or in Earth?
- How much of the earth is made of rock?
- What is the thinnest layer on Earth?
- Does Stone float in water?
- Is Earth a floating rock?
- Why is my lava rock floating?
- Is Earth the only planet with life?
- What is the size of Earth?
- How did Earth get its name?
- What is Earth’s temp?
- How old is the earth?
- Do all rocks sink?
- Is the earth perfectly round?
- Is Earth made of rock?
What keeps the Earth’s core hot?