Attnom Academy assessment paper, Level 3

Science, about class 6

  • Time: 60 minutes
  • 40 marks
  • 23 questions

This paper tests only the chapters below. Read them first. Each question names its chapter in the mark scheme, so a lost mark tells you what to read again.

Sit it here and mark it on this device, or print it on A4 with its mark scheme. The class is a guide: the books are written in levels.

Section A. Quick recall (12 marks)

Tick one answer for each question. Each question is worth 1 mark.

Question 11 mark

A bean plant stands on a window sill. Its stem bends towards the light from the window. Which life process is this?

Question 21 mark

Kofi sorts animals into two groups. Group one is a goat, a frog, a bird and a snake. Group two is an ant, a spider, a crab and a worm. What did he sort them by?

Question 31 mark

A key names four animals. Question one: Does it have a shell? Yes means snail. No means go to question two. Question two: Does it have feathers? Yes means hen. No means go to question three. Question three: Does it have fins? Yes means fish. No means goat. Kofi's animal has no shell, no feathers and no fins. Which animal is it?

Question 41 mark

Mei reads a chart that pairs each organ with its system. Which pair is right?

Question 51 mark

Tariq's grandfather stopped working many years ago. He now walks slowly and is a little shorter than he was. Which stage of life is he in?

Question 61 mark

Ravi lets a little gas into a big empty box. What does the gas do, and why?

Question 71 mark

Carbon dioxide is written CO₂. Each small group has one carbon atom joined to two oxygen atoms. What kind of substance is it?

Question 81 mark

A torch battery lies in a drawer. Which store holds its energy?

Question 91 mark

A fish tank is filled with water 40 cm deep. About how deep does the water look from straight above?

Question 101 mark

A circuit is one loop with a cell, a bulb and an ammeter. The ammeter reads 0.3 A. Kofi moves the ammeter to the other side of the bulb, still in the loop. What does it read now?

Question 111 mark

Kofi finds a rock with crystals so small that he needs a lens to see them. It formed from melted rock. Which story fits it?

Question 121 mark

Tariq is in a street with tall buildings, trees and wires when an earthquake starts. What should he do?

Section B. Worked problems (21 marks)

Show your working. Write the answer with its unit. The marks for each question are shown beside it.

Question 133 marks

Mei looks at a cheek cell through a microscope. The eyepiece makes things look 10 times bigger and the objective lens 20 times bigger. The cell is 0.06 mm wide. How wide does it look, in millimetres?

Question 142 marks

Ana eats a bowl of rice and beans. Explain how the food gets from her gut into her blood, and why it must change first.

Question 152 marks

Ravi notices that he sweats more and has spots on his face. He is worried. What would you tell him, and what causes these changes?

Question 162 marks

Kofi puts one drop of food colour into a glass of water and does not stir it. Over the next hours the colour slowly spreads through the water. Explain how it can spread with no stirring.

Question 172 marks

Air is a mixture of gases. About 78 of every 100 parts of air are nitrogen. A bottle holds 300 cm³ of air. About how much nitrogen is in it?

Question 182 marks

A boat sails across a lake at 3 m/s. The lake is 120 m wide. How long does the boat take to cross it?

Question 192 marks

Mei walks away from home. Her distance and time graph has these points. At 10 s she is 12 m from home. At 20 s she is still 12 m from home. At 30 s she is 30 m from home. What is her speed in the last part of the walk?

Question 202 marks

Ana stretches a rubber band. Its elastic store holds 0.5 J. She lets go, and the band throws a paper pellet. The pellet has 0.2 J in its kinetic store. The rest goes to the thermal store. Ignore the tiny amount that goes out as sound. Aim only at a target, never at a person or an animal. How much energy goes to the thermal store?

Question 212 marks

A ray from a torch hits a flat mirror. The ray makes an angle of 35° with the surface of the mirror. At what angle from the normal does it leave?

Question 222 marks

A toy needs a push of 9 V. Each cell gives 1.5 V. How many cells must be joined in a line, + to −?

Section C. A longer question (7 marks)

Each part uses what you found before. Show your working.

Question 237 marks

Ana makes a model of the solar system on a long string. On the string, 1 m stands for 250 million km. The Earth is about 150 million km from the Sun. Saturn is about 1 430 million km from the Sun. Neptune is about 4 500 million km from the Sun.

(a)How far along the string should Ana put Saturn? [2 marks]

(b)How far along the string should she put Neptune? [1 mark]

(c)How far apart are Saturn and Neptune on the string? [2 marks]

(d)Ana says the Earth, Saturn and Neptune are all rocky balls. Is she right? Explain why. [2 marks]

0 of 26 answered. Your answers stay on this device.

The whole mark scheme, for a teacher or for after you mark

Mark scheme

One line is one mark. A right final answer with no working gets every mark for that part. Lost marks? Read the chapter named under the part.

Question 11 mark

Answer: B. Sensitivity

  1. Noticing a change, here the light, and reacting to it is sensitivity.

Tests S3.1.1 Signs of life

Question 21 mark

Answer: A. Whether they have a backbone

  1. Group one are vertebrates, which have a backbone. Group two are invertebrates, which have none.

Tests S3.2.1 Sorting living things

Question 31 mark

Answer: D. Goat

  1. Follow each No: no shell, no feathers and no fins lead to the goat.

Tests S3.2.2 Using and making keys

Question 41 mark

Answer: C. The brain, in the nervous system

  1. The brain sends signals, so it is in the nervous system.

Tests S3.3.1 Organs and systems

Question 51 mark

Answer: C. Elder

  1. An elder is an adult who has grown old. The body slows down and may get a little shorter.

Tests S3.4.1 The human life cycle

Question 61 mark

Answer: D. It fills the whole box, because its particles fly about and nothing holds them.

  1. The particles of a gas fly about in every direction, so the gas spreads until it fills the box.

Tests S3.5.1 The particle model

Question 71 mark

Answer: B. A compound, because it has atoms of two elements joined together.

  1. It has carbon atoms and oxygen atoms joined together, so it is a compound.

Tests S3.6.1 Elements and compounds

Question 81 mark

Answer: A. Chemical store

  1. Food, fuel and batteries keep their energy in a chemical store.

Tests S3.8.1 Energy stores

Question 91 mark

Answer: C. 30 cm

  1. Water looks about three quarters as deep: 40 ÷ 4 × 3 = 30 cm.

Tests S3.9.2 Refraction

Question 101 mark

Answer: D. 0.3 A

  1. The same current goes all round the loop, so the ammeter still reads 0.3 A.

Tests S3.10.1 Current in a circuit

Question 111 mark

Answer: B. The melted rock cooled quickly.

  1. Rock from melted rock is igneous. Fast cooling gives small crystals, like basalt.

Tests S3.11.1 Three kinds of rock

Question 121 mark

Answer: A. If he can do it safely, walk to an open place away from buildings, trees and wires. Then crouch down and cover his head until the shaking stops.

  1. Outside, walk to an open place away from buildings, trees and wires if it is safe, then drop, cover the head and hold on until the shaking stops.

Tests S3.11.2 Inside the Earth

Question 133 marks

Answer: 12 mm

  1. The lenses multiply: 10 × 20 = 200 times.
  2. Multiply the width by this magnification: 0.06 × 200 = 12.
  3. The cell looks 12 mm wide.

Tests S3.1.2 Seeing small things

Question 142 marks

Answer: Digestion breaks the food down into tiny pieces. Only the tiny pieces can pass through the wall of the small intestine into the blood. Big pieces cannot get through.

  1. Says digestion first breaks the food down into tiny pieces, because big pieces cannot get through.
  2. Says the tiny pieces pass through the wall of the small intestine into the blood.

Tests S3.3.2 Digestion

Question 152 marks

Answer: These are normal changes of puberty. Hormones, chemical messengers carried in the blood, tell the body to change.

  1. Tells him these changes are normal in puberty.
  2. Says hormones, chemical messengers carried in the blood, cause the changes.

Tests S3.4.2 Changes in puberty

Question 162 marks

Answer: The particles of the colour spread out by themselves among the water particles, from where there are many to where there are few. The particles are always moving and bumping into the water particles. This is diffusion, and it needs no stirring.

  1. Says the colour particles spread out by themselves (diffusion), from where there are many to where there are few.
  2. Says the particles are always moving and bumping among the water particles, so they spread with no stirring (slow currents in the water also help).

Tests S3.5.2 Evidence for particles

Question 172 marks

Answer: 234 cm³

  1. 78 of every 100 parts is the fraction 78 ÷ 100 of the air.
  2. 78 ÷ 100 × 300 = 234 cm³.

Tests S3.6.2 Pure substances and mixtures

Question 182 marks

Answer: 40 s

  1. Time = distance ÷ speed.
  2. 120 ÷ 3 = 40 s.

Tests S3.7.1 Speed

Question 192 marks

Answer: 1.8 m/s

  1. The distance in the last part is 30 − 12 = 18 m and the time is 30 − 20 = 10 s.
  2. Speed = 18 ÷ 10 = 1.8 m/s.

Tests S3.7.2 Distance and time graphs

Question 202 marks

Answer: 0.3 J

  1. Energy is not lost, so the 0.5 J that left the elastic store is all in other stores, if we ignore sound.
  2. 0.5 − 0.2 = 0.3 J.

Tests S3.8.2 Energy transfers

Question 212 marks

Answer: 55°

  1. The normal is at 90° to the mirror, so the angle of incidence is 90° − 35° = 55°.
  2. The angle of reflection equals the angle of incidence, so the ray leaves at 55°.

Tests S3.9.1 Reflection

Question 222 marks

Answer: 6 cells

  1. The pushes of cells in a line add up, so divide the push needed by the push of one cell.
  2. 9 ÷ 1.5 = 6 cells.

Tests S3.10.2 Cells and voltage

Question 237 marks

(a)Answer: 5.72 m

  1. Each metre stands for 250 million km, so divide the distance by 250.
  2. 1 430 ÷ 250 = 5.72 m.

Tests S3.12.2 How big and how far

(b)Answer: 18 m

  1. 4 500 ÷ 250 = 18 m.

Tests S3.12.2 How big and how far

(c)Answer: 12.28 m

  1. Saturn is at 5.72 m and Neptune is at 18 m.
  2. 18 − 5.72 = 12.28 m.

Tests S3.12.2 How big and how far

(d)Answer: No. Only the Earth is a rocky planet. Saturn is a gas giant with no ground to stand on. Neptune is an ice giant, with a lot of water and icy stuff under thick gas.

  1. Says No, because only the Earth of the three is a rocky planet.
  2. Says Saturn and Neptune are giants made mostly of gas, or of water and icy stuff, not rock.

Tests S3.12.1 The planets