NSP-111-190717-051604

Please write your answers in the text box provided. Good luck!

1. The graph below shows the concentration of oxygen in the 4 blood sample taken at the same time from different blood vessels located in the different parts of the circulatory system.

The diagram below is a simplified way of showing how blood travels in our body. P, Q, R and S are blood vessels.

a) Which blood sample (W, X, Y or Z) is most likely taken from the blood veseel which is represented by P in the above diagram?
b) Which arrow(s) should represent the movement of blood rich in carbon dioxide?
c) Identify the organ in which the digested food is absorbed into the blood.

3. Lijun filled two beakers, M and N, with water. Next, she added some food colouring to the water. The she placed Beaker M in the compartment of the refrigerator where she kept vegetables and Beaker N in the compartment of the refrigerator where she kept ice-cubes. After two hours, she took the beakers out of the refrigerator and tilted them on the table. In the space provided below, draw what Lijun would observe.

5. Two bunches of fresh leaves were weighed on an equal arm balance as shown below. One of the bunch of leaves was then placed in the hot sun for several hours. The leaves were then placed back onto the arm balance again. The drawing below shows what happened.

(a) Which bunch of leaves was placed in the sun?

7. Study the flow chart below carefully.

Fill in the boxes below with a suitable material for the objects.

 Object Material A ? B ? C ? D ?

9. When a fruit is cut open, seeds can usually be seen.
(a) Why are seeds important in the development of a plant? To answer parts (b), (c), (d) and (e), study the diagrams below.

(b) State ONE similarity between the papaya and the kiwi fruit.
(c) State ONE difference between the papaya and the kiwi fruit.
(d) Name another fruit which is similar to the papaya.
(e) State ONE characteristic of the fruit named in (d) which makes it similar to the papaya.

11. Complete the sentences below with the correct answer from the box. Use each word ONCE only.

 flying growth colour heating flightless moulting interacts attract stroking repel fabric shape mineral salts wood thread carbon dioxide

1.Emus have wings but are______________________ birds.
2.The nymph of a cockroach has a hard body covering that is shed during__________.
3.The roots of a plant take in water and___________ from the soil.
4.When a magnet is attract to an object, we say it_________with the object. 5.Like poles of 2 magnets______________________ each other.
6.______________________ a magnet will cause it to become weaker.
7.Plasticine changes it______________________ when moulded.
8.A handkerchief wrinkles up when crumpled because it is made of soft__________.
9.The handle of a mop is usually made of________but its strands are made of cloth.
10.A plant takes in_________and gives off oxygen during the day when there is sunlight.

13. The diagram below shows the changes in the states of water. A, B, C D are the processes.

Read the following statement. Write T if the statement is True and F if the statement is False.
 Description T/F Heat is lost at Stage A Heat is gained at Stage B Stage B happens only at 100$°$ C Heat is gained at Stage D

15. Which part of the skeleton (the arm, leg or skull) does not have hinge joints? Explain why.

17. Name the sources of the water that formed the water droplets.
Picture A _________
Picture B __________