CAMBRIDGE LOWER SECONDARY SCIENCE 7: MID-YEAR TEST: UNITS 2 AND 5
Name ___________________________________ Date _____________
Disclaimer: This test and mark scheme have been written by the authors.
Mid-year test: Units 2 and 5
1 Which of the following is a property of gases only? [1]
Tick one box.
Has a fixed volume.
Takes the shape of the container it is in.
Can be compressed.
Can be poured.
2 Which elements are present in the following compounds? [4]
a CaO ___________________________________________________________________________
b Copper sulfate ___________________________________________________________________
c Sodium nitrate
___________________________________________________________________
d HCl ___________________________________________________________________________
3 Write the correct name for each hazard symbol. Choose from this list. [2]
toxic flammable corrosive
____________________ ____________________ ____________________
Cambridge Lower Secondary Science 7 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021 1
CAMBRIDGE LOWER SECONDARY SCIENCE 7: MID-YEAR TEST: UNITS 2 AND 5
4 Explain the differences between a compound of iron and sulfur, and a mixture of iron and sulfur. [2]
__________________________________________________________________________________
__________________________________________________________________________________
5 What temperature is:
a 20°C higher than 5°C ______________________________________________________ [1]
b 20°C lower than 5°C? ______________________________________________________ [1]
6 Water has a number of changes of state during the water cycle.
a Complete these sentences to describe how liquid water evaporates from oceans and rivers. [3]
The particles in liquid water are touching one another but not in a regular pattern. The particles can
vibrate and can slide past one another.
As the temperature ___________________________________________, heat energy transfers to
the particles.
The particles vibrate and move ___________________________________________________.
Eventually, some particles have enough energy to escape the weak forces holding the particles
together.
These particles escape as a ______________________________________________________
and move into the atmosphere.
b Name the change of state described below. [1]
The particles in snow and ice are arranged in a regular pattern and are held together by strong
forces. The particles can vibrate but not move from their position. As the temperature increases,
heat energy from the surroundings is transferred to the particles and they vibrate more.
Eventually, the particles gain enough energy to overcome the strong forces holding them in place
and they start to slide past one another.
_______________________________________________________________________________
[Total: 15]
Cambridge Lower Secondary Science 7 – Mary Jones, Diane Fellowes-Freeman and Michael Smyth © Cambridge University Press 2021 2
