CE Науки

Пример теста по Common Entrance Науки

13+ Entrance Examination

For Entry in
Science
1 hour

Candidate Name: ……………………………….

Susan has a small fan to keep herself cool. When she switches it on, a motor turns the blades to blow air.

(a) The diagrams below show the symbols for a battery, a motor and a switch.

[1 marks]

(b) (i) Which part provides energy for the circuit?
.........................................................

[1 mark]

(ii) Some of this energy is used to turn the blades.
The rest of the energy is wasted.
Complete the sentence below. Choose words from the list.
chemical heat light sound

[1 mark]

When the blades are turning, energy is wasted as
....................................... energy and ....................................... energy.

[1 mark]

Total: 4 marks

2. The drawing below shows a space buggy on the surface of Mars.

(a) The distance between Earth and Mars is 192 000 000 km. It took a spacecraft 200 days to take the buggy from Earth to Mars. Calculate the speed at which the spacecraft travelled. Give the unit.
.........................................................................................................................
.........................................................................................................................

[2 marks]

(b) The weight of the buggy was 105 N on Earth and 40 N on Mars. Why was the weight of the buggy less on Mars than on Earth?
.........................................................................................................................
.........................................................................................................................

[1 mark]

(c) The buggy uses solar panels to generate electrical energy. The solar panels generate less electrical energy on Mars than on Earth. Give a reason why
.........................................................................................................................
.........................................................................................................................

[1 mark]

(d) The weight of the buggy was 40 N on Mars. When the buggy landed on Mars it rested on an area of 0.025 m2. Calculate the pressure exerted by the buggy on the surface of Mars. Give the unit
.........................................................................................................................
.........................................................................................................................

[2 marks]

Total: 6 marks

3. The diagram below shows a pen. The pen is held up by two magnets, one in the stand and the other in the pen.

(a) On the dotted lines to the right, label the North pole and the South pole of the magnet in the pen. Use the letters N and S

[1 mark]

(b) John put a block of metal between the two magnets as shown below.
The block of metal became a magnet.
(i) On the dotted lines to the left, label the North poles and the South poles of both the block of metal and the magnet.
Use the letters N and S.

[1 mark]

(ii) What metal could the block be made of?
.............................................................

[1 mark]

(c) John repeated the experiment using a piece of wood instead of a block of metal. The pen did not stay up. Give the reason for this.
.............................................................

[1 mark]

Total: 4 marks

4. The drawings in parts (a), (b) and (c) show two teams of pupils in a tug‐of‐war. There is a ribbon tied to the middle of the rope.
(a) The sizes and directions of the forces of each team are shown.

[1 mark]

The ribbon stays above point X on the ground. Give the reason for this.
.............................................................
.............................................................

[1 mark]

(b) The teams then pull with the forces shown below.

Draw an arrow on the rope to show the direction in which the ribbon will move.

[1 mark]

(c) Later, the ribbon was to the left of point X as shown below.

Why did the ribbon move towards the left?
.............................................................
.............................................................

[1 mark]

Total: 3 marks

5. (a) Alfie made a model of part of the solar system. He used metal balls for the Sun, the Moon and the planets.

E goes around D.
B, C, D, F and G go around A.
Give the letter that is used to label:
(i) The model Sun;
..............
(ii) The model Earth and Moon;
.............. and ..............

[2 marks]

(b) The bar chart shows the force of gravity on eight of the planets.

(i) The gravity on Neptune is 12 N/kg.
On the chart above, draw a bar for the planet Neptune. Use a ruler.

[1 mark]

(ii) Give the name of a planet where you would weigh more than you weigh on Earth.
................................................................

[1 mark]

(iii) On which planet would a spaceship need the largest force to take off? ................................................................

[1 mark]

Total: 5 marks

6. The diagrams show two plant cells.

(a) In which part of a plant would these cells be found?
cell X ? …………………………………………………………
cell Y ? …………………………………………………………

[1 mark]

(b) Give the name of part B. 1 mark
…………………………………………………………………………

[1 mark]

(c) (i) Give the letter which labels the nucleus. 1 mark
…………………………………………………………………………

[1 mark]

(ii) What is the function of the nucleus? 1 mark
…………………………………………………………………………………………………………………………

[1 mark]

(d) (i) How can you tell from the diagram that photosynthesis cannot take place in cell Y? 1 mark
……………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………

[1 mark]

Maximum 6 mark

7. The drawing below shows part of a food web in the sea around Antarctica.

(a) From the food web, give the names of two animals that only eat krill.
1. ………………………………………………………………………….
2. ………………………………………………………………………….

[1 mark]

(b) (i) Choose a word from the following list that describes the plants in a food web? Put a cross in the appropriate box.

[1 mark]

(ii) Krill are small animals that eat tiny plants.
Choose a word from the following list word describes krill in the food web?

[1 mark]

(c) Look at the food web. Leopard seals also eat krill. A decrease in the number of krill will affect the crabeater seals sooner than it affects leopard seals. Give the reason for this. 1 mark
………………………………………………………………………………………………………………….
………………………………………………………………………………………………………………….

[1 mark]

Maximum 4 marks

8. Carbohydrate, fat and protein are three types of nutrient.
(a) Give the names of two other types of nutrient needed for a balanced diet.
…………………………………………………………………………………….
…………………………………………………………………………………….

[2 marks]

A balanced diet contains a variety of foods. Some food groups are shown in the table. They are labelled A to D.

(b) Which food group contains the highest percentage of the nutrient used by the body for growth and repair? Put a cross in the appropriate box.
Choose from the following:

[1 mark]

(c) Fibre is not digested but helps the digestion process. Which food group contains the most fibre? Put a cross in the appropriate box.
Choose from the following:

[1 mark]

(d) Use the information in the table to suggest why milk is better for babies than ice‐cream.
……………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………

[1 mark]

Maximum 5 marks

9. The diagram shows an oak tree in summer.

(a) By the time winter comes, the oak tree has lost its leaves. Explain why this stops the growth of an oak tree.
…………………………………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………………………….

[1 mark]

Maximum 1 mark

10. ‘Wilting roses are a thing of the past.’
Scientists at the University of Leeds have found a way to modify the genes of flowering plants.
They claim that flowers from modified plants remain fresh in a vase of water for up to six months longer than flowers from unmodified plants.

Plan an investigation you could carry out in the school laboratory to test the claim that flowers from modified plants last for much longer than flowers from unmodified plants.
You will be provided with flowers from modified plants and from unmodified plants.
In your plan give:

1. The one variable you will change as you carry out your investigation; (This is the independent variable.)
2. The variable you will measure; (This is the dependent variable.)
3. one of the variables you should control to ensure a fair test;
4. The time scale for the investigation.

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11. Table 1 below shows the colour of universal indicator in acidic, neutral and alkaline solutions

Ramy tested different liquids with the indicator solution.
His results are shown in table 2 below.