1This question is about the states of matter.
aWrite yes or no in each empty box of the table.
State / Can you compress a substance in this state? / Can a substance flow inthis state?
solid / no / no
liquid
gas
(2 marks)
bThe diagram shows a beaker of boiling water. It has been boiling for a few minutes.
Write the letter of the correct label in the box on the diagram.
Labels
A – air in the gas state
B – oxygen in the gas state
C – water in the gas state
D – water in the liquid state
(1 mark)
cThe diagram shows particles of a substance in the solid, liquid, and gas states.
iWrite the letter of the box that shows particles of a substance in the solid state.
(1 mark)
iiName the state in which particles vibrate on the spot.
(1 mark)
2A bottle in the laboratory containing a solution has this hazard symbol.
aTick the one correct meaning of the hazard symbol from the list below.
flammable
toxic
dangerous to the environment
corrosive
(1 mark)
bWrite down two safety precautions you must take when using the solution in the bottle.
(2 marks)
3Riana heats a substance in the solid state. The graph shows how the temperature of the substance changes over time.
aDraw a circle around the correct unit for temperature in the list below.
cm cm3 g °C
(1 mark)
bWhen the substance reaches 70 °C it changes from the solid to the liquid state.
Name this change of state.
(1 mark)
cLook at the graph.
Give the state of the substance after Riana has heated it for 10 minutes.
(1 mark)
4aComplete the sentences using the words and phrases in the box.
Use each word/phrase once, more than once, or not at all.
A substance that cannot be broken down into other substances is called
This type of substance has type
of atom. A compound is a substance that is made up of
type of atom.(3 marks)
bEvery element has its own chemical symbol, and every compound has a formula.
iDraw a circle around the correct chemical symbol for the
element magnesium.
MG Mg mg(1 mark)
iiA molecule of sulfur dioxide is made up of one atom of sulfur joined to two atoms
of oxygen.
The chemical symbol for sulfur is S.
The chemical symbol for oxygen is O.
Write down the formula of sulfur dioxide.
(2 marks)
cEach box shows the particles of one substance.
Each circle represents one atom.
Circles with different shading represent atoms of different elements.
Circles with the same shading represent atoms of the same element.
iWrite the letter of two boxes that contain elements.
and (2 marks)
iiWrite the letter of one box that contains a compound which could have the
formula CO2.
(1 mark)
iiiWrite the letter of one box that contains an element which could have the
formula O2.
(1 mark)
5aThe word equation shows the reaction of sulfur with oxygen.
sulfur + oxygen → sulfur dioxide
iName one reactant in the word equation.
(1 mark)
iiName one product in the word equation.
(1 mark)
bTick the one phrase below that describes the meaning of the arrow (→) in the
word equation.
reacts to make
is equal to
is the same as (1 mark)
cThe word equation shows the reaction of carbon with oxygen.
carbon + oxygen → carbon dioxide
Calculate the mass of carbon dioxide that is made when 12 g of carbon reacts with
32 g of oxygen.
Show your working.
Answer = g(2 marks)
6aAlexa uses indicator paper to measure the pH of some substances.
She writes her results in a table.
Substance / pHA / 6
B / 3
C / 7
D / 14
iWrite down the letter of the substance that is not acidic and not alkaline.
(1 mark)
iiWrite down the letter of the most acidic substance in the table.
(1 mark)
bThe shaded parts of the chart show the pH values of the water that some animals
can survive in.
4.5 / 5.0 / 5.5 / 6.0 / 6.5 / 7.0 / 7.5
trout
salmon
eel
snail
iGive the name of the animal that can live in the most acidic conditions.
(1 mark)
iiThe water pH of Lake Lovely is 5.5. Name three animal species that might live
in the lake.
, , and .(3 marks)
iiiName the type of substance that you could add to Lake Lovely to increase its pH.
(1 mark)
7Zachary is investigating this question:
How does the water temperature affect the time for a purple crystal to diffuse through water?
He uses the equipment and materials shown in the picture.
aZachary makes some notes:
independent variable = temperature of water
dependent variable = time for purple colour to reach
the edge of the Petri dish
Write down two variables in the investigation that Zachary must control to make his investigation fair.
1
2(2 marks)
bThe table shows Zachary’s results.
Temperature of water (ºC) / Time taken for purple colour to reach the edge of the Petri dish(minutes)
20 / 40
30 / 33
40 / 23
50 / 15
60 / 7
iPlot Zachary’s results on the graph axes below.
(2 marks)
iiDraw a straight line of best fit through the points.(1 mark)
iiiUse your graph to describe the pattern in the data.
(1 mark)
8Look at the sentences below.
aTick the three sentences that are true for chemical reactions.
During a chemical reaction, atoms are rearranged.
After a chemical reaction, it is easy to get back the substances that were there at the beginning.
In a chemical reaction, the total mass of the products is equal to the total mass of the reactants.
Chemical reactions make new substances.
Examples of chemical reactions are melting and boiling.(3 marks)
bWhich of the following are examples of chemical reactions? Tick two boxes.
freezing
combustion
decomposition
diffusion(2 marks)
© Oxford University Press 2014
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