New
New
Year 4

Temperature and evaporation: do and review

I can investigate how temperature affects the rate of evaporation.

New
New
Year 4

Temperature and evaporation: do and review

I can investigate how temperature affects the rate of evaporation.

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Lesson details

Key learning points

  1. Scientists make careful observations and measurements, using a range of equipment.
  2. The results of an investigation can be recorded in different ways.
  3. Scientists use data they have collected to answer questions.
  4. Although water can evaporate at low temperatures, the speed of evaporation increases as the temperature increases.

Keywords

  • Evaporation - Evaporation is the change in state from a liquid to a gas.

  • Temperature - Temperature is a measure of how hot something is.

  • Variables - Variables are the things that can be changed, measured or kept the same in a comparative or fair test.

  • Conclusion - In a conclusion, scientists explain what the results show or mean.

Common misconception

Children may believe that water cannot exist in a gas state because they cannot see it. They may also think that evaporation only occurs at high temperatures.

Teaching slides explain the existence of water vapour, even though it is invisible. By investigation, children observe and measure that evaporation occurs at all temperatures.

Before children carry out their investigation, discuss with children what they expect to happen to the mass of each flannel over time and help them equate a loss of mass with a loss of liquid water due to evaporation.
Teacher tip

Equipment

flannels and a spray bottle or shallow dishes, a thermometer, weighing scales

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).

Lesson video

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6 Questions

Q1.
In which state does water take the shape of the bottom of its container?
Correct Answer: liquid
Q2.
In which state does water have a fixed shape except when a force is applied to it?
An image in a quiz
Correct answer: solid
liquid
gas
Q3.
Put the forms of water in order, from the one which would occur at the lowest temperature, to the one which would occur at the highest temperature.
An image in a quiz
1 - solid
2 - liquid
3 - gas
Q4.
are the things that can be changed, measured or kept the same in a comparative or fair test.
Correct Answer: Variables
Q5.
How many variables should you keep the same in or control in a comparative or fair test?
0
1
Correct answer: all but 1
it doesn't matter
Q6.
is the change in state from a liquid to a gas.
An image in a quiz
Correct Answer: Evaporation

6 Questions

Q1.
Scientists use a range of equipment to make careful __________.
An image in a quiz
predictions
Correct answer: observations and measurements
conclusions.
Q2.
Which of these diagrams shows evaporation?
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
An image in a quiz
Q3.
Match the equipment to the measurement you would make with it.
Correct Answer:measuring jug ,volume of liquid

volume of liquid

Correct Answer:stopwatch,time

time

Correct Answer:thermometer,temperature

temperature

Q4.
Why do scientists collect data?
to make tables and graphs
Correct answer: to answer questions
to design new products
Q5.
How does the speed of evaporation change as temperature increases?
The speed of evaporation is not affected by temperature.
Evaporation gets slower as temperature increases.
Correct answer: Evaporation gets quicker as temperature increases.
Q6.
Which of these conclusions do these data support?
An image in a quiz
Evaporation is not affected by temperature.
Evaporation gets slower as temperature increases.
Correct answer: Evaporation gets quicker as temperature increases.

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