Grade 6 Chemistry Test

Question 1

Write the definition of matter.

Answer 1

Anyting that has mas and takes up space.

Question 2

Usetheorganizertowriteaboutthedifferences
betweensolids,liquids,gases,andplasma.Includea drawingoftheirparticles,apropertytheyhave(eg,takes
theshapeofitscontainer),exampleofeach.

Answer 2

Solid­ holdsitsshapeinacontainer particles
arecloselypackedtogether e.g.Ice Liquid­ takes
theshapeofthecontainer particlesarenotasclosely
packedasasolid e.g.water Gas­ Fillsupthecontainer particlesarespreadoutandthespacebetweenthemis
largerthantheparticlesthemselves e.g.watervapour

Question 3

Matter can be classified into 3 different categories what are they?

Answer 3

Elements, compounds mixtures

Question 4

Write the defenition of

a. an atom and give 3 examples
b. compounds and give 3 examples.

Answer 4

a. One of the basic substances that are made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances. e.g. osygen, hydrogen, carbon.
b. Compounds are made of two or more different elements combined together in a fixed composition. Compounds are made of molecules. e.g. CO2, CO2, NaCI

Question 5

What is the difference between elements, compounds and mixtures? Give an example in each of your statments.

Answer 5

Elements are only made up of only one kind of atom (atoms have the same ID) and cannot be broken down into anything simpler. E.G Oxygen, O. Compounds are made of two or more different elements and can be broken down into simper parts but not physically E.g. FeO (iron oxide or rust).
Mixtures are made of different substances combined but can be broken apart physically. E.g. Pepper water.

Question 6

Explain 3 different methods for filtering mixtures and give examples of different mixtures.

Answer 6

Magnet - remove iron fillings in sand
Sieve - separate big and small substances like rice and sand or pasta and water.
Filter paper - separate liquid and small solids like sand and water.

Question 7

What are the 10 properties of materials?

Answer 7

Colour, density, texture, lusture, smell, solubility, conductivity, transparency, combustibility, acidity

Question 8

Examine the following materials and write their different properties in the observation table.
Material | Texture | Conducte | Combust | Transparent
Balloon 
Metal   
Paper   
Plastic 
contai
ner

Answer 8

Balloon | smooth | No | Yes | Opaque
Metal | smooth | Yes | Yes | Opaque
Paper | Smooth | No | Yes | Opaque
Plastic | Smooth | No | Yes | Translucent
contai
ner

Question 9

Give examples of how or what you could use the following materials for:

GOLD
SILVER
COPPER
PLATINUM

Answer 9

Metal | Use
GOLD | Jewellry
SILVER | Jewellry, Bowls, silverware
COPPER | Drinking water pipes, roofs, electrical wire, storage bins, Tools, weapons
PLATINUM: Jewellry, teeth restoration

Question 10

a) Why must you polish silver items?

b) Why does copper turn green?

Answer 10

a) Silver reacts with other substances and becomes tarnished.
b) Copper reacts to oxygen to form a coating call verdigris.

Question 11

Why are some metals more expensive than others, do you Think?

Answer 11

Some metals like precious metals are very rare which makes them more expensive than other metals.

Question 12

The first chemist were called alchemists. They tried to produce gold.

a) Why do you Think they wanted to make gold?
b) What do you Think would have happened if they had succeeded at producing gold?

Answer 12

a) They wanted to become rich/ make other people rich.

b) The cost of gold would decrease because it would not be as rare.

Question 13

Giv an example of 3 different things that are made of metal.

Answer 13

Bike, pen, zipper

Question 14

Write the corect Word for the descriptions from the Word box.

a. Isthelightestmetal.____________________
b. Isnotshedbythebodyandusedinscrewsplaced inabonefracture.______________________
c. Isthemostcommonmetalintheearth’scrust __________________________
d. Aredissolvedinseawater.________________
e. Usedforexampleingasolineandpaint._________
f. Isliquidatroomtemperature._________________
g. Nearly120elementscan
befoundonthis: ___________________________
h. Isusedtoseparatelargesolidmaterialwithsmall solidmaterial.________________
i. Pizzaisanexampleof______________________
j. Describingsoapassmellingfreshisan
exampleofthisproperty:______________
k. Anythingthathasmassandtakesupspace._______________
l. IsacompoundandhasthechemicalformulaCO2._________________
m. Theseparticlesarenotastightlypacked
togetherasthoseinasolid.______________
n. neutronsandprotonsarefoundin
thispartoftheatom.________________
o. Isusedtoseparateliquidsandsolidmaterials.____________
p. Ascientificwordforthing.________________
q. Thepropertythatexplainswhya
balloonwillfloatonwater.__________________
r.Whenwaterboilsandturnstoa
gas,thistypeofstatechangeiscalled_____________________.
s. Thewaysomethingfeelswhenyoutouchitiscalled________________
t. Holdtheirownshape._____________________
u. Addheattoiceanditwill________________intowater.
v. Waterisanexampleofa____________________.
w. Lightningisanexampleof____________________.
x. Isthechemicalpropertyofbeingabletoburn._____________________
y. Theabilityofasubstanceto
allowlighttopassthrough._____________________
z. Thesmallestparticleintowhich
anelementcanbedivided.__________________

Word box:
Magnesium
Nickel
Aluminium
Titanium
Lead
Mercury
Carbon dioxide
Filter paper
Substance
Transparency
SMell
Liquids
Dissolving
Melt
Lusture
Element
combustion
Mixture
Atom
Neutron
Water
Funnel
Conductivity
Acidity
Periodic table
Gases
Evaporation
State change
TExture
Compound
Density
Water
Proton
Electron
Sugar
Seive
Solubility
Color
Matter
Solids
Plasma
Nucleus

Answer 14

a. Isthelightestmetal.magnesium b. Isnotshedbythebodyandusedinscrewsplaced inabonefracture.titanium c. Isthemostcommonmetalintheearth’scrust aluminum d. Aredissolvedinseawater.magnesium e. Usedforexampleingasolineandpaint.lead f. Isliquidatroomtemperature.mercury g. Nearly120elementscanbefoundonthis:periodic table h. Isusedtoseparatelargesolidmaterialwithsmall solidmaterial.sieve i. Pizzaisanexampleofmixture j. Describingsoapassmellingfreshisanexampleofthisproperty:smell k. Anythingthathasmassandtakesupspace.matter l. IsacompoundandhasthechemicalformulaCO2.carbondioxide m. Theseparticlesarenotastightlypackedtogetherasthoseinasolid.liquid n. neutronsandprotonsarefoundinthispartoftheatom.nucleus o. Isusedtoseparateliquidsandsolidmaterials.filterpaper p. Ascientificwordforthing.substance q. Thepropertythatexplainswhyaballoonwillfloatonwater.density r. Whenwaterboilsandturnstoagas,thistypeofstatechangeiscalledevaporation. s. Thewaysomethingfeelswhenyoutouchitiscalledtexture t. Holdtheirownshape.solid u. Addheattoiceanditwillmeltintowater. v. Waterisanexampleofaliquid. w. Lightningisanexampleofplasma. x. Isthechemicalpropertyofbeingabletoburn.combustion y. Theabilityofasubstancetoallowlighttopassthrough.transparency z. Thesmallestparticleintowhichanelementcanbedivided.atom

Question 15

Describe the properties of a notebook made of paper. Why is it useful to make a notebook out of paper?

Answer 15

Absorbs ink or pencil lead which makes it easy to write on
Lightweight to carry around
You can tear of pages easily / You can cut paper with sicissors, which is good if you want to take a piece of paper out of the notebook.
It doesn’t break like glass does. It is flexible, so you can fold pages if you want.
It is cheap to make.
Paper is thin so you can bind many pages together into a book. It is good to have many pages so you can have more space to write.
It is opaque so you can hide what you write by closing it.

Question 16

Explain how water can change into 3 different states.

Answer 16

By adding or removing heat, water can change into 3 states. liquid + jeat ? gas(water vapour), liquid - heat = solid(ice), solid + heat = liquid(water), gas - heat = liquid(water)

Question 17

Ingrid had read about different ways to store food. She and Grandpa usually get
very herring when they are out fishing, so she wanted to do an investigation of how to store herring for a long
time.
Ingrid used a herring when she conducted the investigation. Here’s what she did:
1) She sliced the herring into four pieces (head, two side pieces and a tail portion).
2) She put the head in vinegar, one middle piece in the freezer and the other middle piece in salt.
The tail piece was put in a sheltered spot outdoors in the sun so that it would dry.
3) After three days, she checked what happened to the herring pieces that lay in the vinegar
and in the freezer. They had not rotted and were in good condition.
4) Fourth day she examined the second middles, which were also ok.
5 ) After a week she observed the tail piece that was outdoors. It did not look so
good.
Task:
Provide various suggestions Ingrid could have done better its investigation so that the result
become more accurate and comparable.

Answer 17

Only change 1 thing(ex. number of days because she was investigating time, not HOW to store herring)
Used the same part of the fihs(ex, only middle part)
Instead of using different ways of storing, she could use only one way of storing fish.

Question 18

In winter salt is added to the roads for the snow to melt. But some people can argue that the cars (which are
made of iron) will rust more when you salt the roads.
Think of an investigation using salt in water (melted snow) to find out if cars rust faster. Instead of cars,
use the iron nail in your investigation.
Equipment that you can use:
Glass jars (as many as needed) with lid
Iron nails
Water from the faucet
saltTask:
Describe the details below how you want to do your investigation (planning or procedure). Your
description should be clear so that someone else can follow. Draw a picture to show what you did.

Answer 18

First i added 250 ml of water to each jar. Jar 1 only had water, Jar 2 added 1/2 dl of salt, Jar 3 added 1 dl of salt, Jar 4 added 1 1/2 dl of salt.

Then I stirred each jar until the salt dissolved, and added a nail to each jar and screwed on the cap.
Observations were made everyday for 1 week After 1 week, the nails were removed and observed for changes.

Question 19

The class has talked about water evaporates from the oceans and lakes and then condenses and becomes
clouds. Think of a simple investigation, you can do yourself showing that water vapor condenses.
Describe your procedure below, so that someone else can repeat your investigation.

Answer 19

Boil 250 ml of water in a pot.
Once water has started to boil, add a cold lid.
Water vapour will condense and form liquid on lid.
Measure water after condensation. Write observations.
OR
Put 250 ml of water in a beaker outside in the sun
Wait for several hours and make observations
Measure the amount of water after several hours.

Question 20

What material conducts electricity well? Select an option.
A. Plastic
B metal
C glass
D wood

Answer 20

B metal

Question 21

Camilla has a mixture of iron filings and sand. She wants to separate them. How can she do that?
Select an option.
A Shake the mixture. Then iron shavings to rise to the surface.
B Pouring water into the mixture. When the sand will dissolve in the water.
C Pour the mixture through a sieve. When the sand will remain in the sieve.
D Bring a magnet over the mixture. Then the magnet will attract the iron filings.

Answer 21

D Bring a magnet over the mixture. Then the magnet will attract the iron filings.

Question 22

Priscilla’s teacher put a bowl of water on a sunny windowsill. When Priscilla looked again towards the
end of the day, there is no water left. Explain what has happened to the water in the bowl.

Answer 22

The water warmed up from the heat of the sun and evaporated turning into water vapour

Question 23

Decide what state / phase the water is in. Select the solid, liquid or gas on each line.
steam \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
rain \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
hail \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
snow \_\_\_\_\_\_\_\_\_\_\_\_\_

Answer 23

steam - gas
rain - liquid
hail - solid
snow - solid

Question 24

Water can be in three forms: Solid, Liquid, Gas. For A­level question you are required to explain the
movement of the water molecules in those three different states.
Solid:
Liquid:
Gas:

Answer 24

● particles are tightly packed together
● little space between particles
● little energy
● particles vibrate
Liquid:
● Particles are not as tightly packed as solid
● more space between the particles
● more energy
● particles are moving faster
Gas:
● Particles spaced far away from each other
● more space between particles than size of particles
● most energy
● particles are moving the fastest

Question 25

Samuel and Mait doing an experiment at home on the kitchen table. First they mix the powdery sand
and water, and mix them thoroughly. The water turns cloudy.
a. They pour the mixture through a sieve. The liquid which comes through which was previously cloudy.
What is the best explanation for that?
A Sand grains are larger than the holes in the strainer.
B sand grains are as large as the holes in the strainer.
C Sand grains are smaller than the holes in the strainer.

b. Now they pour the mixture into a funnel with a coffee filter. The sand remains in the filter. The liquid
that comes through is quite clear.
What is the best explanation for the sand does not passes through the filter?
A Sand grains are larger than the pores in the filter.
B sand grains are as large as the pores of the filter.
C sand particles smaller than the pores in the filter.
D There are no pores in the filter. The sand can not come through.

c. They wonder how it is that the water comes through coffee filter.
What is the best explanation for that?
A water molecules is larger than the pores in the filter.
B Water molecules as large as the pores of the filter.
C Water molecules are smaller than the pores of the filter.
D Water molecules trapped in the filter but the water goes throug

Answer 25

a) A Sand grains are larger than the holes in the strainer.
b) A Sand grains are larger than the pores in the filter.
c) C Water molecules are smaller than the pores of the filter.