1.What causes chemical weathering of rocks?

Fig. 1.1 shows part of the nitrogen cycle.

Which arrow represents nitrifying bacteria?

3. A farmer has a large piece of land on which he grows wheat year after year.

What is the name for this type of farming?

4. Fig. 8.1 shows the reproductive organs of a male farm animal

What is structure X ?

5. Fig. 8.2 shows the internal reproductive organs of a female farm animal.

6. Flies can be vectors (carriers) of disease-causing organisms.

In animal housing, what will help to prevent the spread of diseases by flies?

7, Which type of disease is spread by an infected animal touching a healthy one?

8.Methane is a gas released by livestock, as a result of digestive processes. Fig. 6.3 is a

bar chart that compares the amount of methane released by different types of livestock.

Approximately how much more methane is released by a cow than by a goat?

9. What increases demand for a product?

Fig. 9.1 shows a house used for small livestock.

What will be improved by replacing the thatched roof with corrugated iron?