Q: The higher up a food chain that humans eat, the greater the levels of toxic metals they take in. If Jim eats animals that are lower on the food chain, the amount of toxic metals that enter his body are greater or smaller?
A: smaller

Q: The older a person is, the greater their chance of developing a cardiovascular disease. When someone gets younger what happens to their heart stronger or weaker?
A: stronger

Q: Fossils found at the lowest layer of rock would be the oldest, as these would have been buried for the longest time, whereas fossils found closer to the surface would be buried more recently and therefore be younger. Everett went lower and lower to look at the rocks on the cliff. The lowest rocks are likely youngest or oldest?
A: oldest

Q: As the amount of water increases, the melting point of rock decreases. Ian is trying to melt rocks, nothing that the water around the rocks is quite high. Since there is a lot of water around the rocks, the melting point of the rock will be increased or decreased?
A: decreased