SC2106 Par2

15       This diagram shows how six organisms obtain food for energy.

(a) Which organism in the table is a herbivore?

(b) Grass is an organism that can make its own food.

What name is given to organisms that can make their own food?

16       The diagram shows the life cycle of a flowering plant.

(a-1) Name stage 1

16       The diagram shows the life cycle of a flowering plant.

(a-2) Name stage 2

16       The diagram shows the life cycle of a flowering plant.

(a-3) Name stage 3

(b) The above stages have a process called pollination and during that process
where does pollen move?

17       Year 6 (Teak Tree) use wood to make a compost bin for garden waste.

         They put leaves, grass cuttings and vegetable waste in it.

(a) A few months later, the garden waste in the compost bin has changed.

      Explain what happens to the garden waste inside the compost bin.

(b) Later in the year, the children empty the compost bin. They put the compost

    around the plants in the school garden.

    How does compost help the plants in the school garden?

(c) Your school wants to make compost for the garden by using waste from the

 kitchen.
Which of these items would be best to add to the compost bin?

18       George is looking at a model of a flower.

(a-1)Name parts A

18       George is looking at a model of a flower.

(a-2)Name parts B

18       George is looking at a model of a flower.

(a-3)Name parts C

18       George is looking at a model of a flower.

(a-4)Name parts D

18       George is looking at a model of a flower.

(a-5)Name parts E

(b) Part F is sepal of the flower. Write its function.     

(c) On the flower A, circle the place where pollen lands at pollination.

(d) Later, Hein Khant brought a cough grass flower and give it George to

observe.

(Flower B)

And they discuss how is this flower pollinated? Choose one box what the

pollination method you think.       

(e)  Give one reason for your answer choice in part (d).        

(f) Explain what ‘pollination’ means?     

(g) For which life process does a plant need flowers?  

19       Some bacteria can grow and reproduce very quickly.

At 08:30, there is one bacterium in the soup.

          Vicky leaves the soup in a warm kitchen all morning.

          At 09:00, the bacterium has reproduced and now there are two bacteria in the

          soup.

          At 09:30, there are four bacteria.

• (i) The bacteria keep reproducing at the same rate all morning.

Complete the table to show how many bacteria are in the soup by 10:30.

19       Some bacteria can grow and reproduce very quickly.

At 08:30, there is one bacterium in the soup.

          Vicky leaves the soup in a warm kitchen all morning.

          At 09:00, the bacterium has reproduced and now there are two bacteria in the

          soup.

          At 09:30, there are four bacteria.

• (i) The bacteria keep reproducing at the same rate all morning.

Complete the table to show how many bacteria are in the milk by 10:30.

(ii) How many bacteria will there be at 12 noon if they continue to reproduce at the same rate?

19(b)

• Vicky’s mother says she should have put the soup in a refrigerator at

08:30.

          Explain why Vicky’s mother is correct.

20       Aye Chan places 100 seeds of plant P and 100 seeds of plant Q in moist soil. She then records the number of seeds that germinate on each day.

(a)(i)

• Complete the following sentences.                           (2)

The greatest number of the seeds of plant P takes ………………… days to germinate.

20       Aye Chan places 100 seeds of plant P and 100 seeds of plant Q in moist soil. She then records the number of seeds that germinate on each day.

(a)(i) Complete the following sentence.              

The greatest number of the seeds of plant Q takes …………..… days to germinate.

20(b) Based on the graph, explain which seeds are easier to grow.