Psle 2012 Science Questions And Answers -

C) Cell wall Explanation: Plant cells have a rigid cell wall outside the cell membrane for support; animal cells do not.

Which of the following is an example of a chemical change? A) Melting butter B) Frying an egg C) Dissolving sugar in water D) Tearing paper psle 2012 science questions and answers

A student builds two circuits. Circuit A has one bulb and one battery. Circuit B has the same bulb but two batteries connected in series. C) Cell wall Explanation: Plant cells have a

(a) What is the expected result? (b) Why is it necessary to keep both plants in the same temperature? Circuit A has one bulb and one battery

A mango seed is planted in a pot with soil. It is watered regularly but kept in a dark cupboard. After 2 weeks, the seed sprouts but has yellow leaves.

(a) What happens to some of the energy after the ball hits the ground? (b) Name the main type of energy the ball has just before it hits the ground.

A cactus has a thick, fleshy stem and no leaves, only spines.