9C Quick Quiz


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9Ca

1 Where does photosynthesis occur in a rose bush?

A in all the parts

B in parts R and S only

C in part R only

D in part Q only

 

2 Plants often turn some of the food they make into another substance for storage. The name of this substance is:

A glucose. B starch.

C fibre. D pasta.

 

3 Which of these shows the correct word equation for photosynthesis?

A glucose + carbon dioxide water + oxygen (+ energy)

B glucose (+ energy) oxygen + glycerol

C water + carbon dioxide (+ energy) glucose + oxygen

D chlorophyll + carbon dioxide water + glycogen

 

4 Aerobic respiration is a process which:

A stores chemical energy in food.

B makes food for plants living under water.

C does not happen in plants but only in humans when they exercise hard.

D releases energy from food.

 

9Cb

1 Leaves are often wide so that they can:

A absorb as much sunlight as possible.

B catch as much rain as possible.

C provide shelter for animals living under them.

D float to the ground when they drop in autumn.

 

2 Gases get into and out of a leaf by:

A diffusion. B absorption.

C conduction. D convection.

 

3 Look at this list of substances.

glucose   fat    cellulose   protein

Which of these substances can plants make?

A glucose and cellulose only

B glucose, cellulose and fat

C glucose, cellulose and protein

D all of them

 


4 Plants need cellulose to:

A store energy.

B repair damaged cells.

C make cell walls.

D make cell surface membranes.

 

9Cc

1 The picture shows a cell from a root.

What is it called?

A xylem cell B root cortex cell

C root palisade cell D root hair cell

 

2 If plants do not get enough water they start to:

A shrink.

B grow towards the light.

C grow bigger roots.

D wilt.

 

3 One important type of mineral salt is:

A nitrate. B sodium chloride.

C clay. D loam.

 

4 Water is carried up a plant in xylem tubes. What else do xylem tubes carry?

A glucose B fibre

C mineral salts D pollen

 

9Cd

1 The atmosphere is about:

A 80% oxygen and 20% nitrogen.

B 80% nitrogen and 20% oxygen.

C 80% carbon dioxide and 20% oxygen.

D 80% oxygen and 20% carbon dioxide.

 

2 Look at these chemical processes.

photosynthesis respiration burning fuels

Which of these processes add carbon dioxide to the air?

A respiration and burning

B respiration only

C photosynthesis and respiration

D burning only

 

3 Plants are important in keeping the atmosphere in balance because:

A they use up oxygen.

B they use up carbon dioxide.

C they provide food for animals and humans.

D they use water.

 

4 Which of these would not be a disadvantage of cutting down forests?

A Logging companies could make more profits.

B There would be fewer trees to keep the atmosphere in balance.

C Some species might become extinct.

D Floods might wash away the soil.