(a) Is this complete or incomplete metamorphosis? (b) Name one difference between the larva and adult stages.
(a) Algal bloom. (b) Algae block sunlight → plants die → less oxygen → fish die.
(a) What has happened to the steel rod? (b) What is this process called? psle 2012 science questions and answers
(a) What is the role of the grass in this food web? (b) If all frogs are removed, explain what will happen to the grasshopper population.
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) Is this complete or incomplete metamorphosis
(a) Transpiration. (b) Presence of sunlight / open stomata / water in the soil.
(a) What is the expected result? (b) Why is it necessary to keep both plants in the same temperature? (b) Algae block sunlight → plants die →
(a) Name this phenomenon. (b) What causes it?
A steel rod is placed near a magnet but does not move. When the rod is stroked 20 times with the same pole of the magnet, it can now attract paper clips.
A pupil wants to test if light is needed for photosynthesis. She uses two potted plants, one in sunlight and one in a dark cupboard. After 48 hours, she tests both leaves for starch.