Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Describe Properties of Fluids

In this worksheet, students will look at the particle arrangement in fluids and describe properties of this type of substance.

'Describe Properties of Fluids' worksheet

Key stage:  KS 3

Year:  Year 8 Science worksheets

Curriculum topic:   Physics: Matter

Curriculum subtopic:   Particle Model

Difficulty level:  

Worksheet Overview

What is a fluid?

A fluid is a substance that can flow. Therefore, liquids and gases are both fluids. They are able to flow because their particles are not in a fixed position and are able to slide over each other.

 

cloud


A cloud forms when water vapour turns from gas to a liquid. In each state, it is a fluid.

 

Shape

One of the properties that defines liquids and gases is that they do not have a fixed shape. This means that they can be poured into a container of any shape, and they will take the shape of that container.

 

coffee cup  bottle  jug

 

Bottles, glasses, and jugs can be made in many different shapes, and a fluid will still be able to change shape to fill it with no gaps.

 

Volume

Volume tells us how much space something takes up. It is measured in metres cubed, or litres for fluids. This is where liquids and gases have a difference in their properties.

 

pouring water

 

Liquids have a fixed volume. This means that a liquid will remain the same 'size', regardless of where it is or the conditions it is under. For example, if you poured 2 litres of water from a jug into a cup, you would still have 2 litres of water.

 

gas escaping a bottle

 

On the other hand, if you had a bottle holding 5 litres of gas and opened the lid, the gas would escape and it would spread out. Therefore, it would no longer occupy 5 litres. Gases do not have a fixed volume. They can either expand ('grow') or contract ('shrink') due to changes in pressure and temperature.

 

Compressibility

The final property we will look at is compressibility, and this just means whether or not the substance can be squashed.

 

Compressing a substance means forcing it into a smaller space. As we have just seen, liquids have a constant volume, so it is not possible to compress liquids. When held in a container, applying a downwards force on the liquid will not force it to shrink. 

 

syringe

 

Meanwhile, gases, due to having much more space between their particles, can be compressed. You can 'squash' a gas in a syringe for example, by pressing the top with your thumb.

 

Now that you have seen the similarities and differences between liquids and gases, let's have a go at some questions.

What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started
laptop

Try an activity or get started for free

  • National Tutoring Awards 2023 Shortlisted / Parents
    National Tutoring Awards 2023 Shortlisted
  • Private-Tutoring-WINNER-EducationInvestor-Awards / Parents
    Winner - Private Tutoring
  • Bett Awards Finalist / Parents
    Finalist
  • Winner - Best for Home Learning / Parents
    Winner - Best for Home Learning / Parents