New
New
Year 5

Water resistance: do and review

I can carry out an investigation into water resistance and evaluate results.

New
New
Year 5

Water resistance: do and review

I can carry out an investigation into water resistance and evaluate results.

Lesson details

Key learning points

  1. Scientists take, repeat and compare measurements using a range of scientific equipment.
  2. The evaluation of an investigation can include an explanation of, and degree of trust in, the results.
  3. Greater surface area on a moving object can increase water resistance.

Common misconception

All objects experience the same amount of water resistance, regardless of their size or shape.

Discussion and explicit teaching. The investigation they carry out will show them that this is not true.

Keywords

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

  • Trust - How reliable we think the results of an investigation are.

  • Reliable - If a result is reliable, it measures something consistently.

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

This lesson should link directly to the previous lesson in this unit (Lesson 7) whereby children planned how they are going to find answers to the question: Does the shape of an object affect water resistance?
Teacher tip

Equipment

Modelling dough, 2 litre bottles, water, trays, equipment to film in slo-motion, stopwatches.

Content guidance

  • Risk assessment required - equipment

Supervision

Adult supervision required

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

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6 Questions

Q1.
Match the force created, to the example:
Correct Answer:water resistance,submarine moving through the sea

submarine moving through the sea

Correct Answer:air resistance,helicopter flying

helicopter flying

Correct Answer:friction,car tyres on a road

car tyres on a road

Q2.
The the surface area of a moving object, the greater the air resistance.
Correct Answer: greater, bigger, larger, higher
Q3.
Air resistance and water resistance are both types of friction that act in the direction to the direction of movement.
Correct Answer: opposite, opposing
Q4.
On which part of moving objects does water resistance act?
An image in a quiz
the inside
the top and bottom
Correct answer: the surface
Q5.
Which of these would you find in a conclusion?
Correct answer: an explanation of the results
a table of results
a line graph
Correct answer: an answer to the enquiry question
Q6.
Why do runners sometimes use parachutes in training?
An image in a quiz
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.
Correct answer: To increase air resistance so they have to work harder.
Q6 Jacob Lund/ Shutterstock.com

6 Questions

Q1.
Which of this equipment would not help you measure time?
clock
Correct answer: scales
sand timer
stopwatch
Q2.
Which of these are non-contact forces?
friction
Correct answer: gravity
water resistance
air resistance
Correct answer: magnetism
Q3.
If the results of an investigation are reliable, it means you can ...
An image in a quiz
measure them
Correct answer: trust them
draw them
Q4.
Scientists take repeat measurements to ...
Correct answer: see if the results can vary
make more complex graphs
Correct answer: check their results are reliable
Q5.
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.
Correct Answer: evaluation
Q6.
Match the size of the surface area to its effect on a moving object.
Correct Answer:Larger surface area ,Increase water resistance

Increase water resistance

Correct Answer:Smaller surface area,Decrease water resistance

Decrease water resistance

Correct Answer:Larger surface area ,Increase air resistance

Increase air resistance

Correct Answer:Smaller surface area ,Decrease air resistance

Decrease air resistance

Q1 image 2 UYSEG

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