Science

Question 1

1The products of photosynthesis are

Easy

A. carbon dioxide and water B. starch and nitrogen C. glucose (sugar) and oxygen D. salt and oxygen

Question 2

2Which mineral element is needed for green leaves?

Hard

A. gold B. mercury C. lead D. nitrogen (and magnesium)

Question 3

3The raw materials for photosynthesis are

Easy

A. carbon dioxide and water B. salt and water C. oxygen and glucose D. nitrogen and sugar

Question 4

4Variegated leaves have white parts that

Hard

A. lack chlorophyll and do not make starch B. make more starch C. store water only D. contain extra chlorophyll

Question 5

5Carbon dioxide enters the leaf through tiny pores called

Easy

A. root hairs B. petals C. xylem D. stomata

Question 6

6Plants that cannot make their own food and feed on dead matter, such as mushrooms, are

Hard

A. autotrophs B. saprophytes C. producers D. carnivores

Question 7

7A plant kept in the dark for two days is "destarched" so that

Hard

A. it makes oxygen B. it grows faster C. it dies D. any starch found later must be newly made

Question 8

8Plants release carbon dioxide during photosynthesis.

Easy

A. True B. False

Question 9

9Photosynthesis is the process by which green plants

Easy

A. take in oxygen for respiration only B. absorb soil C. produce seeds D. make food using light energy

Question 10

10Before testing a leaf for starch, it is boiled in alcohol to

Hard

A. add starch B. make it green C. remove chlorophyll D. kill the plant