Science Home Learning Task
Year 7
Particles
Name
Tutor Group
Teacher
Given out:
Monday 21 November
Parent/Carer Comment
Staff Comment
Target
Hand in: Monday 28 November
TASK 1- Particle models
The arrangement of particles in solids, liquids and gases is different. This
difference explains why they behave differently. Answer the questions
below about particles and their behaviour.
a) Complete the boxes below to show how the particles are arranged in
solids, liquids and gases. Hint: - remember particles are drawn as
circles
Solid
Liquid
Gas
b) Complete the sentences below using the keywords provided in the box.
Each word can be used more than once.
far
touch
past
poured
fast
fixed
fill
compressed
volume
shape
i) Solids
The particles in a solid are in __________________ positions.
Solids cannot be _____________________________.
Solids have a fixed _____________________ and ________________.
ii) Liquids
The particles in a liquid can move ______________ one another but
cannot ____________________.
Liquids cannot be _____________________________.
Liquids have a fixed volume but not a fixed _______________ and can be
______________________.
iii)
Gases
The particles in a gas are very __________ apart and do not
_____________one another.
The particles move very _______________ and can be
________________________.
Gases do not have a fixed _______________ or a fixed _______________
and can ____________ any space.
TASK 2 – Changing state
Solids, liquids and gases can change their state. In the diagram below, each
arrow represents a change of state. Answer the questions below.
a) Which letter represents melting? _________________________.
b) What is the name of the process represented by the letter B?
_________________________________________________________.
c) What is the name of the process represented by the letter C?
_________________________________________________________.
d) What happens to the particles in a liquid when they become a solid?
_________________________________________________________
_________________________________________________________
_________________________________________________________
_________________________________________________________
_________________________________________________________
_________________________________________________________
_________________________________________________________
TASK 3 – Melting and boiling points
1. The next questions are about the table below.
Substance
Bromine
Oxygen
Mercury
Neon
Platinum
Silver
Helium
Melting point (ºC)
-7
-218
-39
-249
1769
961
-272
Boiling point (ºC)
59
-183
357
-246
4530
2210
-268
a) Which substance has the highest boiling point?
b) Which substance has the lowest melting point?
c) Write down the names of the substances in order of increasing melting
point, starting with the lowest.
Lowest
Highest
d) Name one substance in the table that is a gas at 20ºC.
____________________________________________________________
e) Name two substances in the table that are liquids at 20ºC .
______________________________________________________________
______________________________________________________________
f) Name one substance that is a solid at 20ºC.
____________________________________________________________
TASK 4 – Diffusion
The diagram below shows the process of diffusion – particles moving
randomly through gases or liquids.
1. Using the diagram above, describe what happens to particles of sugar
when you add them to a cup of tea.
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
__________________________________________________________________
________________________________________________________________
TASK 5 – Extension Task
Compare the processes of boiling, evaporation and condensation. Think about what
happens to the particles in each process and whether they lose or gain energy. You can
add diagrams too.
Self Evaluation of my Homework
I am a R____________________ learner.
I know this because:
______________________________________________________
______________________________________________________
______________________________________________________
I believe that my effort and attitude to learning for this booklet is a:
1
2
3
4
I know this because:
______________________________________________________
______________________________________________________
______________________________________________________