Water resistance is a type of friction force which acts between water and the surface of an object.

How reliable we think the results of an investigation are.

If a result is reliable, it measures something consistently.

In the evaluation of an investigation, scientists judge how reliable the results and conclusion are.

Water resistance: do and review

Science

In this Forces and simple machines unit, pupils learn that air resistance, water resistance and friction push back against moving objects. In this Forces unit, pupils will build on this knowledge to accurately describe and explain the actions of forces in a range of situations.

In the Simple forces including magnets unit, pupils learnt to compare how things move on different surfaces. In this Forces including simple machines unit, pupils will build on this knowledge to identify the effects of air resistance, water resistance and friction, that act between moving surfaces

This unit covers the effects of gravity, air resistance, water resistance, and friction on objects. It explores how mechanisms like levers, pulleys, and gears magnify forces. Emphasis is on taking precise measurements, recording complex data, and presenting findings.

Forces including simple machines

Physical activity and equipment requiring safe use

Which of this equipment would **not** help you measure time? 

If the results of an investigation are reliable, it means you can ...

Scientists take repeat measurements to ...

In the {{}} of an investigation, scientists judge how reliable the conclusion is. This can include an explanation of, and degree of trust in, the results.

Match the size of the surface area to its effect on a moving object.

The {{}} the surface area of a moving object, the greater the air resistance.

Air resistance and water resistance are both types of friction that act in the {{}} direction to the direction of movement. 

On which part of moving objects does water resistance act?

Which of these would you find in a conclusion?  

To decrease air resistance so they have to work harder.

To increase air resistance to stop them slipping.

To decrease air resistance to help them run faster.

To increase air resistance so they have to work harder. 

Why do runners sometimes use parachutes in training?

Content guidance

Risk assessment required - equipment

Adult supervision required

Introduction

What will you need for this lesson?

Are you ready to learn?

Equipment

Content guidance

Supervision

Worksheet