Available Answers

1. 1.

   State four properties of a physical change.

2. 2.

   State four properties of a chemical change.

3. 3.

   Give an example of a chemical change in which there is a change of colour that takes place.

4. 4.

   Write the factors that cause rusting.

5. 5.

   Why do cut vegetables take up a brown colouration when exposed in air?

6. 6.

   Lime water turns milky on passing carbon dioxide gas into it. Explain.