1How would you carry out a research work to find out which substances affect the growth of algae? Write its objective, materials and method.
2Fill in the blanks: in the growth of algae, chemical fertiliser plays a .......... part, while acid plays a .......... part.
3Which colour absorbs more heat, white or black? Carry out a short research work on this, draw a conclusion and prepare a report.
4Write the seven steps of a research work in order.
5Why is nothing at all added to the first bottle?
6What should be done if the hypothesis made at the start of a research work turns out to be wrong?
7How does heavy growth of algae affect the animals living in the water?
8Why is the method section of a research report written in the past tense?