A student placed a dry soil sample in a bottle. She added some water and then closed the bottle with a lid. She shook the bottle and allowed the mixture to settle for about 20 minutes. The diagram below shows the results.

1. aWhat is soil constituent P? [1]
2. bName the soil separate labelled Q. [1]
3. cState two characteristics of soil separate Q. [2]
4. dWhat percentage of the soil is mineral matter? [1]

You'll mark your own answer against the marking guide when you hand it in.