G7 Science Sample Questions

8/12/2019 G7 Science Sample Questions

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``dGGrade

7

Science

Y

External Measurement

of Student Achievement

LQG S`dGdG d

Test Instructions

You are allowed 60 minutesfor this test.

There are different types of questions:

Multiple choice

Each question has four possible answers.Onlyone is correct.

Use only a pencil to shade in the answerbubble of your choice.

If you make a mistake then rub out youranswer completely and shade in thebubble of your new answer.

Complex multiple choice

A table is shown with bubbles in each row. Shade in an answer bubble in each row of

the table.

Open response

Write your answers in the spaces providedwithin the test booklet.

Do not write outside the answer spaces.

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QNG P`Sample Test


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2

1.

. . .

. 2.12

36

15

4

0.25


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Grade 7 Science

3

1

2

Why are alloys useful?

They can be found in all parts of the Earth's crust.

They can be formed from a mixture of any elements.

They can be made with whatever properties are needed.

They can be changed to a different alloy easily.

Abdullah rolls a ball across a bowling green.

It rolls 12 metres in 3 seconds.

What is the average speed of the ball in metres per second?

36

15 4

0.25


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4

3 4

5

A

biggerthenos

B

smaller

C

nochange

D

biggerthensmaller

40000 m

9000 m

6000 m

3000 m

1000 m

sea level


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3 What is the definition of an alloy?

Aluminium in its purest state

A coating of one metal applied to another

A non-metal mixed with small amounts of other non-metals to produce a

substance with different propertiesA metal mixed with small amounts of other elements to produce a substance with

different properties

4 Which organelle would you find in a plant cell but not in an animal cell?

Cell membrane

Cell wall

Cytoplasm

Nucleus

5 As a weather balloon rises higher into the atmosphere, what change will occur?

Grade 7 Science

40000 m

9000 m

6000 m

3000 m

1000 m

biggerthen pops

smaller no change bigger then smaller

sea level


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6

6

.

. .

. . 7

. .

. .

.

Howcanwetell

iftheresbeen

achemicalreaction?

pull


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6

Which answer is best?

You get a chemical reaction only when you mix the correct substances.

You have a chemical reaction when the reactants are destroyed.

You have a chemical reaction when sound and electricity are made.

You might have a chemical reaction if a gas is released or there is a colour change.

7 Fatima puts a pencil on top of a piece of paper on a desk.

She then quickly pulls the paper sideways.

Why does the pencil stay on the table?

There is too little friction between the paper and the desk.

There is too much friction between pencil and paper.

There is no downwards force on the pencil.

There is too little sideways force on the pencil.

Grade 7 Science

How can we tell

if theres been

a chemical reaction?

pull


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8

. 8

9


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8 A family has a holiday home next to a river.

Which action will make theworstimpact on this ecosystem?

Building a bridge over the river

Installing solar power

Planting grasses and shrubs along the river bank

Using a rainwater tank

9 Which particle diagram represents a mixture of a compound and an element?

Grade 7 Science


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10

. 10

XYZ ZYX

ZX,Y ZYX

ZX,Y 11

Moon

Earth

Sun light from Sun Y

X

Z

not to scale


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10

11

The diagram represents the Sun, Moon and Earth during a solar eclipse.

What would happen at X, Y and Z on the Earth?

A partial eclipse at X, Y and Z

A partial eclipse at Y and a total eclipse at X or Z

A total eclipse at X, Y and Z

A total eclipse at Y and a partial eclipse at X and Z

Which diagram shows a mixture of two elements?

Grade 7 Science

Moon

Earth

Sun light from Sun Y

X

Z

not to scale


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12

.1969 12

13

14


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12 This is a picture of Edwin Aldrin standing on the Moon in 1969.

How does his mass and weight compare on the Earth and Moon?

Less mass on the Moon but the same weight

Less weight on the Moon but the same mass

Same mass on the Moon but no weight

Same weight and same mass on the Moon

13 Which organelle is found in both plant and animal cells?

Cell wall

Electron

Mitochondria

Chloroplasts

14 What is the cause of highatmospheric pressure? Air cools down, contracts, becomes heavier and sinks

Air cools down, expands, becomes lighter and rises

Air warms up, contracts, becomes heavier and sinks

Air warms up, expands, becomes lighter and rises

Grade 7 Science


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14

. 15

16

.

. .

.


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15 Some supermarkets sell meals that are self heating.

What causes the heat?

A chemical reaction

The ingredients in the food

Energy from the Sun

A physical change

16

If there was no friction, what would happen to this pendulum once it was set in motion?

It would slow down.

It would speed up.

It would swing higher.

It would never stop moving.

Grade 7 Science


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16

17

18

:.,

., ., .,

:. :

.


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17 Which row in the table gives the correct units for mass and weight?

MASS WEIGHT

Newton TonKilogram Newton

Newton Kilogram

Kilogram Ton

18

A stomach is best classified as

A cell, since it has only one overall function.

Tissue, since all its cells perform the same function.

An organ, since it is comprised of tissues with different functions.

An organism, since it is able to digest food.

Grade 7 Science

Function:

How it works:

Breaks down food to help

digestion.

Muscles churn food

Glands release chemicals to

break down food.

Human stomach


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18

19

..

20H2O,NaCl,Cl2

H2O,CaO,NaCl

Cl2,H2,N2

N2,AlCl3,CaCl2


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19

The moon is the main cause of high and low tides.

Twice a month there are tides which are higher than normal.

What causes these higher tides?

Earthquakes under the sea bed

Heavy rainfall putting water into rivers

The gravity of the Sun

High winds out at sea

20 Which group of substances contains only compounds?

Cl2, NaCl, H2O

NaCl, CaO, H2O

N2, H2, Cl2 CaCl2, AlCl3, N2

Grade 7 Science


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20

21

. .

. .

. .

22


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21

A rocket is launched from the surface of the Earth.

Another identical rocket is launched from the International Space Station.

Why does the rocket launched from the Earth need a bigger thrust?

The gravity of the Earth gets bigger further away from the Earth

There is no gravity in space so less thrust is needed

The gravity of the Earth does not affect the thrust needed

The gravity of the Earth gets smaller further away from the Earth

22 What is an example of a prosthetic limb?

A transplanted kidney

An artificial leg A glove to protect the hand

An operation to correct a broken toe

Grade 7 Science


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22

23.

. .

,. 24

.


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23 Which is the most accurate statement about atmospheric pressure?

Air pressure is constant.

Air pressure at sea level is lower than in the mountains.

Air moves from areas of high pressure to low pressure causing wind.

Air pressure is higher on cooler days, but is usually affected by other factors.

Grade 7 Science

24 Dialysis removes waste products and excess fluids from the bodies of people who have

suffered an organ failure.

Which organ has failed in someone who needs dialysis?


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Grade 6 Science

24

. 25

.:+ = +

. , .I

. .II

. 26.

zinc

dilutehydrochloricacid


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25 Sara adds a strip of zinc to hydrochloric acid.

She observes bubbles forming around the strip of zinc.

The following word equation describes the reaction:

zinc + hydrochloric acid = zinc chloride + hydrogen

I. Use the word equation to explain why the bubbles form around the strip of zinc.

II. Suggest 2 reasons why the bubbling stops.

Grade 7 Science

zinc

dilutehydrochloricacid

26 The atmosphere is a layer of gases surrounding the Earth.

Explain why the layer of gases stays close to the Earth.

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G7 Science Sample Questions