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Target

Science Home Learning Task

Year 7

Particles

Name

Tutor Group

Teacher

Given out: Monday 23 November

Hand in: Monday 30 November

Investigating science

Welcome to your Science homework booklet. This booklet is designed to give you some

extra practise on the key areas in the “particles and their behaviour” section of the

course .

You need to carry out tasks 1, 2, 3 and 4.

Then choose either the bronze, silver or gold task – go on, challenge yourself.

Don’t forget to fill in the last page and ask a parent/carer to sign the box on the front

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

b) Complete the sentences below using the keywords provided in the box.

Each word can be used more than once.

i) Solids

The particles in a solid are in __________________ positions.

Solid Liquid Gas

far touch poured fast fixed fill

past compressed volume shape

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 happens to the particles in a liquid when they become a gas?

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d) What is the name of the process represented by the letter C?

_________________________________________________________.

e) What happens to the particles in a liquid when they become a solid?

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TASK 2 continued

Imagine you are a water particle in a kettle. Explain what happens to you

when the kettle is switched on. Use the keywords in the box below to help

you.

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air particle energy liquid

boiling evaporating

TASK 3 – Melting and boiling points

Substances that change state between a solid, liquid or gas have a melting

point and a boiling point.

1. What happens when a substance melts in terms of change of state?

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2. What happens when a substance boils in terms of change of state?

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3. The next questions are about the table below.

Substance Melting point (ºC) Boiling point (ºC)

Bromine -7 59

Oxygen -218 -183

Mercury -39 357

Neon -249 -246

Platinum 1769 4530

Silver 961 2210

Helium -272 -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.

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 .

Lowest

Highest

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f) Name one substance that is a solid at 20ºC.

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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.

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2. Some factors such as temperature can affect how fast diffusion

happens. Would particles of sugar move faster in a hot drink than a cold

drink? Explain your answer.

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3. Another factor that can affect how fast diffusion happens is the state of

the diffusing substance (whether it is a solid, liquid or gas). Which one

would move faster - particles of perfume in the air or particles of sugar

in water? Explain your answer.

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TASK 5 – Bronze, silver or gold? Complete one task from below.

Bronze task

Design a model to show how particles are arranged in a solid, liquid or gas. Draw and

label a diagram of your model and include a list of the materials you would use to make

it. You don’t need to make it though. Use the last page to design your model.

Silver 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. Use the last page for your comparison.

Gold task

You are a scientist who has been asked to talk about “gas pressure” to primary school

pupils. The pupils need to know what gas pressure is in terms of particles and how heat

and cold can affect gas pressure. Include some models or diagrams to help with your

explanation. Use the last page to record your information.

Blank page for bronze, silver or gold task

Extra space for the bronze, silver and gold tasks

Self Evaluation of my Homework

I am a R____________________ learner. I know this because:

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I believe that my effort and attitude to learning for this booklet is a:

1 2 3 4

I know this because:

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