Students identify the variables to be kept constant, and the variable to be different, when they plan a fair test to show if green plants need light to grow.
For this practical task students are provided with four types of plant storage organs. They classify examples as one of these types of food storage organ. Students also look at the tap root and a tuber and describe the main differences between them.
Four diagrams showing different ways plants store food (tuber, bulb, corm, and a tap root) are provided. Students are asked to identify which method of food storage different plants use. Three short answer questions are also included.