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Course: Alhussan Chemistry — Stage 7
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Alhussan Chemistry — Stage 7

Chapter 1: The Particle Model and States of Matter

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Chapter 2: Elements, Compounds and Mixtures

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Chapter 3: Metals and Non-Metals

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Chapter 4: Chemical Reactions 1

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Chapter 5: Acids and Alkalis

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Chapter 6: The Earth and Plate Tectonics

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Quiz

Chemistry 3.6 Better bicycles — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Early bikes were made of ____.
gold
iron
wood only
plastic
2.
Steel is cheap and ____.
soft
brittle
strong
light
3.
Bike mass over history. By how much does "Bike mass (kg)" change between 1870 and 2020?
Dr Dabour Hub Academy - figure 1
26
5
16
20
4.
A steel frame is 2.4 kg and a CFRP frame 0.9 kg. What is the percentage saving in mass?
167%
15%
38%
62%
5.
Bike mass over history. Between which two values of "Year" did "Bike mass (kg)" change the most?
Dr Dabour Hub Academy - figure 2
1870 and 1900
1900 and 1950
1950 and 2000
2000 and 2020
6.
Mass of bike frames made of different materials. What is the total of all the values?
Dr Dabour Hub Academy - figure 3
2.4
4.8
8.0
6.4
7.
Which term matches this definition? “How well a material resists reacting with air and water.”
Brass
Electric current
Corrosion resistance
Metal
8.
A steel frame is 2.4 kg and carbon fibre 1.0 kg. Calculate the percentage saving.
42%
58%
140%
583%
9.
Density is mass divided by ____.
volume
time
length
area
10.
Bike mass fell from 18 kg to 14 kg. Calculate the percentage decrease.
4%
78%
22%
29%
11.
Why might bamboo be chosen for a bike frame?
It is strong, comfortable and sustainable
It is a metal
It is magnetic
It conducts electricity
12.
Steel bends instead of ____ in a collision.
breaking
shining
melting
rusting
13.
Steel bikes are strong and cheap. What is a disadvantage of steel?
It may rust and is heavy for its size
It is very expensive
It breaks like glass
It is too light
14.
A steel frame is 2.5 kg and carbon fibre 1.0 kg. Calculate the percentage saving.
60%
150%
40%
2%
15.
Which is the correct definition of “Toughness”?
Resistance to cracking under impact.
Hard form of carbon.
The only metal that is liquid at room temperature.
Very unreactive non-metal gas.
16.
Cost of bike frames. Which has the smallest value?
Dr Dabour Hub Academy - figure 4
Steel
Aluminium
Carbon fibre
Titanium
17.
Aluminium frames are ____ than steel.
weaker
cheaper
heavier
lighter
18.
Engineers choose materials by comparing ____.
colours
brands
names
properties
19.
Bike mass fell from 30 kg to 10 kg. Calculate the percentage decrease.
20%
33%
67%
200%
20.
Cost of bike frames. About how many times bigger is Titanium than Steel?
Dr Dabour Hub Academy - figure 5
15.0
10.0
5.0
20.0
21.
Bike mass over history. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 6
A
B
C
D
22.
Cost of bike frames. What is the total of all the values?
Dr Dabour Hub Academy - figure 7
3466
1500
2834
3150
23.
Tyres are made of ____.
rubber
glass
steel
aluminium
24.
A lighter bike needs ____ energy to ride uphill.
the same
more
less
no
25.
Which statement is correct?
Steel is expensive.
Titanium is cheap.
A lighter bike needs less energy to ride uphill.
Painting steel causes rust.
26.
Bike mass fell from 18 kg to 10 kg. Calculate the percentage decrease.
44%
8%
56%
80%
27.
Which statement is NOT correct?
Painting steel helps prevent rust.
Aluminium resists corrosion.
By 1900 steel tubes made bikes lighter.
Carbon fibre is heavy.
28.
Which term matches this definition? “Mass per unit volume.”
Conductivity
Sonorous
Bromine
Density
29.
True or false? Racing bikes use light materials.
True
False
30.
Which statement is NOT correct?
No material is perfect.
Steel is cheap and strong.
Steel is iron with carbon.
Steel is expensive.
31.
Pure iron is ____.
very strong
soft
light
expensive
32.
Which statement is correct?
Pure iron is very strong.
Steel snaps easily in a collision.
Titanium is cheap.
Steel bends instead of breaking in a collision.
33.
Which is the correct definition of “Titanium”?
Strong, light, expensive metal.
Metal used for wires; second-best conductor.
How well a material conducts.
How well a material resists reacting with air and water.
34.
Bike mass over history. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 8
A
B
C
D
35.
A steel frame is 2.5 kg and carbon fibre 0.8 kg. Calculate the percentage saving.
2%
212%
32%
68%
36.
True or false? Bike materials are compared on strength, stiffness, density, toughness, corrosion resistance and cost.
True
False
37.
Which statement is NOT correct?
By 1900 steel tubes made bikes lighter.
Painting steel helps prevent rust.
A lighter bike needs less energy to ride uphill.
Pure iron is very strong.
38.
Density of materials (g/cm³). What is the value for Aluminium?
Dr Dabour Hub Academy - figure 9
2.7
4.5
8.9
7.9
39.
True or false? Lighter bikes need more energy uphill.
True
False
40.
Racing bikes use ____ materials.
soft
cheap
light
heavy
41.
Bike mass over history. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 10
A
B
C
D
42.
Which statement is NOT correct?
Steel bends instead of breaking in a collision.
One material is perfect for bikes.
Racing bikes use light materials.
Tyres are made of rubber.
43.
By ____ steel tubes made bikes lighter.
1700
1900
2000
1800
44.
Which term matches this definition? “How much force a material withstands before breaking.”
Electrical conductor
Strength
Toughness
Conductivity
45.
True or false? No material is perfect.
True
False
46.
Which statement is correct?
Pure iron is very strong.
Lighter bikes need more energy uphill.
Steel snaps easily in a collision.
Painting steel helps prevent rust.
47.
Mass of bike frames made of different materials. What is the value for Titanium?
Dr Dabour Hub Academy - figure 11
0.9
1.5
2.4
1.6
48.
Titanium costs $1200 and steel $200. How many times dearer is titanium?
0.2 times
6.0 times
1400.0 times
1000.0 times
49.
Mass of bike frames made of different materials. Which has the greatest value?
Dr Dabour Hub Academy - figure 12
Steel
Titanium
Carbon fibre
Aluminium
50.
Cost of bike frames. What is the value for Steel?
Dr Dabour Hub Academy - figure 13
300
1200
150
1500
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Part of Chapter 3: Metals and Non-Metals — see every lesson and quiz in this unit.
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