Past Paper Science grade 7
SEMESTER ASESSMENT
1. Which statement about a solid, a
liquid or a gas is correct?
A.
A
solid has a fixed shape and can be compressed.
B.
A
liquid takes the shape of the container it is in and can be compressed.
C.
A
solid has no fixed shape and cannot be compressed.
D.
A
gas takes the shape of the container it is in and can be compressed.
2. The arrangements of particles in
solids, liquids and gases are different. Which statement about the molecules in
ice, water or steam is correct?
A.
The
H2O molecules are on average closest together in steam.
B.
The
H2O molecules are on average furthest apart in water.
C.
The
H2O molecules in steam have the second highest average velocity.
D.
The
H2O molecules in ice are able to vibrate.
3. Which statement about liquids and
gases is correct?
A.
1
cm3 of gas contains more particles than 1 cm3 of liquid.
B.
A
given mass of liquid has a fixed volume at room temperature.
C.
Particles
in a liquid can easily be forced closer together.
D.
Particles
in a liquid have fixed positions
4. The three rectangles show the
arrangements of the particles in each of the three states of matter. X, Y and Z
represent the processes needed to change from one state to another
What are the processes X, Y and Z?
5. Diagrams of the three states of
matter for carbon dioxide are shown
Which two diagrams show the states
of matter before and after the sublimation of carbon dioxide?.
A.
2
to 1
B.
2
to 3
C.
3
to 1
D.
3
to 2
6. The table shows the numbers of
atoms present in the formula of some compounds
Which row is not correct?
7. Which compound is formed by atoms
from two different elements chemically bonded together ?
A.
Sulfur
dioxide
B.
Potassium
carbonate
C.
Sodium
nitrate
D.
Iron
sulfate
8. The table below show the properties
of four substance, A to D. which substance is a metal?
9. Which diagram shows mixture of
different element ?
10. The diagram below a mixture of two
substance, X and Y
Which of the following is correct ?
A.
X
is insoluble substance but Y is an insoluble substance
B.
X
is the filtrate and Y is the residue
C.
X
must be a compound and Y must be an element
D.
X
is recovered by filtration and Y is recovered by crystallisation
11. The table shows some physical
properties of four different substances
Which row describes the properties
of a non-metallic element?
12. What is a property of all metals?
A.
conducts
electricity
B.
hard
C.
low
melting point
D.
reacts
with water
13. Which statements about the general
properties of metals are correct?
14. Which statement about an alloy is
correct?
A.
It
is a compound made of two or more elements, one of which is a metal.
B.
It
is a layer of a metal plated onto another metal.
C.
It
is a mixture of a metal with one or more other elements.
D.
It
is a single element.
15. Metal M is mixed with copper to
produce bronze.
What is M ?
A.
chromium
B.
nickel
C.
tin
D. zinc
16. Four different solutions, J, K, L
and M, are tested with universal indicator
Which solutions are acidic?
A.
J
and M
B.
K
and M
C.
K
only
D.
L
only
17. Methyl orange is added to dilute
hydrochloric acid and to aqueous sodium hydroxide.
What is the colour of the methyl
orange in each solution?
18. Which gas is made when powdered
zinc is added to dilute hydrochloric acid?
A.
carbon
dioxide
B.
chlorine
C.
hydrogen
D.
oxygen
19. The table shows the pH of four
aqueous solutions, W, X, Y and Z.
Universal Indicator is added to
each solution. Which row shows the colour of each solution after the indicator
is added?
20. Which substance is the most acidic?
.jfif)
My name is Ayu. I am working in education as teacher. In my life i have motivation " Dont give up before try it".
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