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HIA International — Grade 8

Unit 1: Photosynthesis and the carbon cycle

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Unit 2: Properties of materials

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Unit 3: Forces and energy

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Unit 4: Maintaining life

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Unit 5: Reactivity

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Unit 6: Sound and space

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Unit 7: Genes and inheritance

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Unit 8: Rates of reaction

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Unit 9: Electricity

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Quiz

Checkpoint Grade 8 Unit 5 – 5.2 Comparing Metals And Non Metals

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Comparing Metals And Non Metals Checkpoint Chemistry quiz set 2: free practice for Cambridge Checkpoint (chemistry). Work through this Comparing Metals And Non Metals Checkpoint Chemistry quiz set 2 and get instant feedback on every answer. If you get stuck, review the 15.2 Comparing metals and non metals lesson. More practice: Cambridge Checkpoint (chemistry) — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: B+
  • Time limit:
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1.
Which statement correctly describes appearance?
resistance to scratching or indentation
able to be hammered or pressed into shape
the observable look of a sample
ability to conduct energy or electricity
2.
Which term is described as: the observable look of a sample?
hardness
conductivity
malleable
appearance
3.
Which statement correctly describes hardness?
the observable look of a sample
able to be hammered or pressed into shape
resistance to scratching or indentation
ability to conduct energy or electricity
4.
Which term is described as: resistance to scratching or indentation?
appearance
conductivity
malleable
hardness
5.
Which statement correctly describes conductivity?
the observable look of a sample
resistance to scratching or indentation
able to be hammered or pressed into shape
ability to conduct energy or electricity
6.
Which term is described as: ability to conduct energy or electricity?
appearance
hardness
malleable
conductivity
7.
Which statement correctly describes malleable?
the observable look of a sample
ability to conduct energy or electricity
able to be hammered or pressed into shape
resistance to scratching or indentation
8.
Which term is described as: able to be hammered or pressed into shape?
appearance
conductivity
malleable
hardness
9.
Which of these is the FIRST step in the correct order?
test hardness
test conductivity
record whether the sample is malleable
observe appearance
10.
Which step comes immediately after "test hardness"?
observe appearance
record whether the sample is malleable
test conductivity
11.
Which practical work belongs to Comparing Metals And Non Metals?
Compare pure metals with alloys and connect composition to material properties
Handle dilute laboratory chemicals safely and match hazards to appropriate precautions
Link material properties to uses such as wires, tools, containers and construction
Compare samples using fair tests for appearance, conductivity, hardness and malleability
12.
Maya put identical ice cubes on five blocks of the same size, all at room temperature, and measured how much ice melted in 5 minutes. Which conclusion do her results support?
Dr Dabour Hub Academy - figure 1
Copper is the only one of the five materials that conducts heat
Polythene is the best thermal conductor, as it kept the most ice
The metal blocks passed heat to the ice faster than the others
The metal blocks must have started out colder than the others
13.
Two element bars of the same size, one a metal and one a non-metal, were hung on string and tapped with the same hammer. A sound meter recorded the graph. Which bar is most likely the metal?
Dr Dabour Hub Academy - figure 2
Bar B, as its sound fades away almost at once
Bar A, since its sound lasts for several seconds
Bar B, as it starts with the louder sound level
Bar A, as it starts with the quieter sound level
14.
Yusuf set up the circuit in the diagram. The ammeter read 0 mA for copper, iron and graphite, as well as for sulfur. What is the most likely reason?
Dr Dabour Hub Academy - figure 3
The switch is open, so no current can flow
None of the four samples is able to conduct
The ammeter is in the wrong place in the loop
Samples must be heated before they can conduct
15.
Overhead power cables hang between pylons many metres apart. Using the charts, why are they usually made of aluminium rather than copper?
Dr Dabour Hub Academy - figure 4
Al conducts electricity better than copper does
Al is denser, so the cables hang more steadily
Copper does not conduct well enough to be used
Al conducts fairly well and is under a third as dense
16.
Two solid elements, M and N, were heated in a furnace and their temperatures recorded. The flat parts of the lines show where each one melts. Which conclusion is best supported?
Dr Dabour Hub Academy - figure 5
M melts near 660 °C, typical of a metal
N melts near 660 °C, typical of a metal
N melts near 115 °C, typical of a non-metal
M and N both melt at about the same temperature
17.
Thin strips of five elements were pulled slowly until they broke (graph). The elements that are NOT ductile, because they snapped without stretching, are _____.
Dr Dabour Hub Academy - figure 6
copper and aluminium
iron and sulfur
aluminium and silicon
silicon and sulfur
18.
Hana made the flow chart in the diagram to classify elements. She tests it on copper, sulfur, graphite (grey, shiny, conducts) and iodine (shiny grey-black crystals, does not conduct). Which elements does it classify wrongly?
Dr Dabour Hub Academy - figure 7
Sulfur and iodine
Copper and graphite
Graphite and iodine
Only the graphite
19.
Kaveh rubbed each of four element samples against the others to compare their hardness (table). A harder sample scratches a softer one. What is the order from hardest to softest?
R, P, S, Q
P, R, S, Q
Q, S, P, R
R, S, P, Q
20.
Fatima tested four samples three times each (table). What is the best thing to do about sample W?
Call W a metalloid, since it conducted in only some trials
Check the clips and repeat; trial 2 is likely a bad contact
Use only trial 1, since the first result is the most reliable
Call W a non-metal, since it failed to conduct in one trial
21.
The thin wire filament in an old-style light bulb glows at about 2500 °C. Using the table, which metal could be used for the filament?
Tungsten and iron
Iron, copper and lead
Tungsten on its own
Any of the four metals
22.
Diego tapped bars of the same size and timed how long each rang (table). The mean ring time for the aluminium bar is _____.
3.1 seconds
9.3 seconds
3.3 seconds
4.0 seconds
23.
A heat sink carries heat away from a computer chip that can reach 150 °C. Using the table, which element would be completely unsuitable?
Sulfur: melts below 150 °C and barely conducts
Copper: conducts heat far too well to be useful
Aluminium: melts at a temperature below 150 °C
Lead: conducts heat better than any other in it
24.
The data in the table support the statement "all metals are hard and denser than water". True or false?
True – every metal in the table is dense and hard
True – only non-metals can ever be cut with a knife
False – iron and tungsten are soft metals as well
False – sodium and potassium are soft and less dense
25.
Each group tested five elements and classified them as metal or non-metal (table). What best explains why iodine and graphite were so often classified wrongly?
Iodine and graphite are metals that look like non-metals
The groups tested iodine and graphite with the wrong circuit
Iodine and graphite change type when they are hammered
Each has one metal-like property that misled some groups
26.
A metal spoon feels colder than a plastic spoon in the same room because the metal spoon is at a lower temperature. True or false?
False – both are at room temperature; metal conducts heat away faster
True – metals are always colder than plastics
True – metals absorb cold from the air around them
False – the plastic spoon is really the colder one
27.
Plastic-coated copper wire uses a metal to carry the current and an insulator to stop the current reaching the person holding it. True or false?
False – the plastic carries the current, not the copper
True – copper conducts and the plastic insulates
False – copper is an insulator used for safety
True, but only when the wire is carrying heat
28.
Many metal saucepans have handles made of plastic or wood because metals are good thermal conductors and a metal handle would get too hot to hold. True or false?
False – metal handles are poor conductors of heat
False – plastic is used only because it is cheaper
True – the insulating handle stays cool to hold
True, but only for pans made of non-metals
29.
An element that is a good conductor of electricity is usually also a good conductor of heat. True or false?
False – good electrical conductors are thermal insulators
False – no element conducts both heat and electricity
True, but only when the element is a liquid
True – metals are good at conducting both
30.
Sulfur has a density of 2.1 g/cm³ and iron 7.9 g/cm³, so a 10 cm³ block of iron has about 58 g more mass than a 10 cm³ block of sulfur. True or false?
True – iron 79 g, sulfur 21 g, so 58 g more
False – the difference is only 5.8 g
False – the sulfur block has the greater mass
True, but only if the blocks are heated first
31.
In a scratch test for hardness, the harder of two samples is the one that leaves a scratch on the other. True or false?
False – the softer sample scratches the harder one
True – a harder material scratches a softer one
False – hardness is found by tapping the samples
True, but only if both of the samples are metals
32.
Most non-metal elements are poor conductors of heat, which means they are thermal insulators. True or false?
False – non-metals conduct heat better than metals
False – only metals can be thermal insulators
True – heat passes through them slowly
True, but only for non-metals that are liquids
33.
An old lead pipe with a dull grey surface must be a non-metal because it has no lustre. True or false?
True – every metal is shiny all of the time
True – lead is a non-metal found on the right
False – lead pipes are made from a metalloid
False – many metals are dull only on a tarnished surface
34.
Metals conduct electricity when molten (liquid) as well as when solid; mercury, a liquid metal, is a good conductor. True or false?
True – they are conductors in both states
False – metals conduct only while they are solid
False – mercury is an insulator because it is liquid
True, but only if the metal is also sonorous
35.
Ductile and malleable mean the same thing: both describe a material that can be hammered into thin sheets. True or false?
True – both words describe hammering into sheets
True – both words describe breaking when hit
False – ductile means it can be drawn into wires
False – malleable means it can be drawn into wires
36.
Copper melts at 1085 °C and sulfur at 115 °C, so the melting point of copper is almost ten times higher. True or false?
False – copper is only twice as high
True – 1085 ÷ 115 is about 9.4 times
False – sulfur has the higher melting point
True – 1085 − 115 is exactly ten
37.
Kaya compares the electrical conductivity of five elements using an ammeter. The independent variable in her investigation is _____.
the current shown on the ammeter
the element used as the sample
the voltage of the single cell
the length of each connecting wire
38.
Aluminium is used for aircraft bodies partly because it has a low _____ compared with most other metals, so the aircraft is lighter.
melting point (°C)
hardness (scratch test)
density (mass per cm³)
lustre (surface shine)
39.
Each property is paired with how it could be measured in a school lab. Which pairing is correct?
Sonority – reading in °C on a thermometer
Hardness – current in mA on an ammeter
Electrical conductivity – time taken to ring
Melting point – temperature in °C on a thermometer
40.
Each object is paired with two properties that make its metal suitable. Which pairing is correct?
Tungsten bulb filament – conducts and has a very high melting point
Aluminium drink can – brittle and dull
Copper water pipe – insulator and brittle
Steel bell – dull and not sonorous
41.
Each element is paired with a property that makes it an exception to the usual pattern. Which pairing is correct?
Sulfur – a non-metal that conducts electricity well
Iodine – a non-metal with a shiny surface
Copper – a metal that shatters when it is hit
Gold – a metal that cannot be hammered flat
42.
Each observation is paired with a conclusion. Which pairing is correct?
Crumbles when it is bent – ductile, so likely a metal
Bulb stays off in circuit – good electrical conductor
Rings for 4 s when tapped – sonorous, so likely a metal
Melts at 44 °C – a melting point typical of a metal
43.
Which set of properties is typical of a solid non-metal element?
Dull, brittle, poor conductor, low melting point
Shiny, malleable, good conductor, high melting point
Dull, ductile, good conductor, high melting point
Shiny, brittle, good conductor, low melting point
44.
Maya repeats her ice-melting test to compare thermal conductivity. Which variable must she keep the same for every block?
The material that each of the blocks is made of
The mass of ice that melts in the five minutes
The colour of the blocks, so all look alike
The size of the ice cube and of each block
45.
In a sonority test, why are the bars hung from string rather than laid flat on the bench?
String makes each bar ring at the same loudness
The bench would stop the bar vibrating freely
Bars on a bench would conduct heat to the table
Hanging makes the non-metal bars ring for longer
46.
Two learners disagree about whether a sample looks "shiny" or "dull". Which change would make their lustre observations most reliable?
Let each learner decide on their own and record only their first view
Look at the samples in a dim room so reflections are all the same
Compare each sample with a shiny and a dull reference under one light
Record lustre only for samples that already conduct electricity
47.
An element melts at 1455 °C, has a shiny surface, conducts electricity and can be hammered flat. Which could it be?
Nickel, a metal
Sulfur, a non-metal
Bromine, a non-metal
Iodine, a non-metal
48.
Diya says: "Metals are malleable, so all metals must be soft." Which evidence best shows she is wrong?
Sodium is a metal that can be cut with a knife
Sulfur is a non-metal that shatters when it is hit
Copper can be drawn out into long, thin wires
Iron can be hammered into shape yet is hard to scratch
49.
A jeweller chooses gold to make very fine wire earrings that stay attractive. Which two properties of gold matter most?
It is brittle and sonorous
It is ductile and has lustre
It is dull and a good insulator
It is brittle and has lustre
50.
Why is copper used both for the base of some cooking pans and for electrical wiring?
It is a poor conductor, so it stays cool to hold
It is brittle, so it can be shaped into bases and wires
It is a good conductor of heat and electricity
It has a low melting point, so it heats quickly
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Part of Unit 5: Reactivity — see every lesson and quiz in this unit.
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