| What evidence for large forces in the crust may show up in the rocks? |
| Which blood vessel could be described as one cell thick and just wide enough for red blood cells to pass through? |
| Which sex will a person with XY sex chromosomes be? |
| Give two types of evidence for proving evolution. |
| The absorption/ reflection of infra-red radiation by gases in the atmosphere when it is given out by the Earth causes the Earth's temperature to (increase/ stay the same/ decrease). |
| Give two ways energy might be lost from a food chain. |
| What is the voltage of the electrical supply found in homes? |
| A system of feedback which reverses any changes is known as a _____________ feedback system. |
