Psle 2012 Science Questions And Answers -

(a) What process do the plants carry out during the day that benefits the fish? (b) What gas do the fish release that is used by the plants?

Two identical bar magnets are placed on a table. When the north pole of magnet X is brought near magnet Y, magnet Y moves away.

(a) It has become a temporary magnet. (b) Magnetisation by stroking. psle 2012 science questions and answers

(a) North pole. (b) Like poles repel.

(a) What is this rapid growth of algae called? (b) Explain how this affects fish in the river. (a) What process do the plants carry out

(a) Which pole of magnet Y is facing magnet X? (b) State the rule you used.

(a) Evaporation. (b) Increase temperature / blow air over the surface. When the north pole of magnet X is

A group of pupils placed a wet cloth over the top of a potted plant for 24 hours. After that, they saw water droplets on the inside of the cloth.