| How does an object gain gravitational potential energy? |
| Name the different layers of the Earth. |
| How is igneous rock formed? Give two examples of igneous rock. |
| What are the vertical columns in the periodic table called? |
| Describe the process of photosynthesis. Use a word equation to help. |
| Why does blood from a smoker contain less oxygen than blood from a non-smoker? |
| Explain how you could use a metal to tell the difference between water and dilute acid. |
| Describe how temperature changes can make cracks in rocks form. |
