Reactivity series
Which metal is more reactive: sodium or copper?
sodium
A car travels 200 metres in 10 seconds. What is its speed in metres per second?
20 m/s
What is the unit of force?
Newton
What is the unit of pressure?
Pascal
What are the small, repeating units called that make up a polymer?
Monomers
Magnesium is added to hydrochloric acid and a gas is released. What is the gas?
hydrogen
A cyclist moves at a speed of 5 m/s for 12 seconds. How far does the cyclist travel?
60 metres
A force of 10 N is applied to a 2 kg object. What is the acceleration?
If the volume of a gas is decreased, what happens to its pressure (assuming temperature stays the same)?
What is the name of the polymer made from α-glucose?
Starch
Zinc is placed in a solution of copper sulfate. A reaction occurs. What does this tell you about the relative reactivity of zinc and copper?
Zinc is more reactive than copper
A runner travels 400 metres at a speed of 4 m/s. How long does the run take in minutes and seconds?
1 minute 40 seconds
A box is pushed to the right with a force of 20 N, while friction pushes left with 5 N. What is the resultant force, and in which direction?
15 N to the right
Explain why increasing the temperature of a gas in a sealed container causes the pressure to rise.
The particles of the gas move faster and hit the side of the container more often
What term describes a material made from two substances to combine their best properties?
Composite
Silver is placed in hydrochloric acid, but no reaction is observed. What does this tell you about silver’s position in the reactivity series relative to hydrogen?
Silver is less reactive than hydrogen
A distance–time graph shows a straight line sloping upwards. What does this tell you about the speed of the object?
The speed is constant (steady)
An object accelerates at 3 m/s² when a force of 15 N is applied. What is the mass of the object?
5 kilograms
What is the average atmospheric pressure at sea level in hPa (hectopascals)?
1013 hPa
What name is given to hard, brittle, non-metal materials formed in kilns?
Ceramics
Carbon can be used to extract iron from its ore, but not to extract aluminium. What does this tell you about the positions of iron and aluminium in the reactivity series?
iron is less reactive than carbon, while aluminium is more reactive than carbon
Two lines are shown on a distance–time graph. Line A is steeper than Line B. Which object is moving faster, and how do you know?
Line A: The steeper line is the faster object
A trolley starts at rest. A resultant force causes it to accelerate at 2 m/s² for 4 seconds.
What is its final speed?
8 m/s
What does the relationship P ∝ 1/V mean in terms of gas behaviour?
As volume decreases, pressure increases — they are inversely proportional. This is Boyle's Law.
What composite material is made from glass fibres set in a resin, and used in boats and car panels?
Fibreglass