P5 Water Cycle and Changes of State

water cycles changes in state

water cycles changes in state

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Everything you need to know about it.

brought to you by Ms Choo Jia Jia

CONTENTS

P4 Matter to help you understand Water Cycles and Changes of State:

States of Matter

What is Matter?

Processes Involving Changes in State

The Water Cycle

What are Cycles?

Water as a Precious Resource

Practice Makes Perfect ✨

Summary

Click on the icon to proceed straight to the section you need!

wHAT IS mATTER?

Cycles (P3 & 4) Textbook pg 20 - 23

Matter is anything that has mass and occupies space

Info

Info

States of Matter

Liquids

Gases

Solids

• Fixed volume
• No fixed shape

• Fixed volume
• Fixed shape

• No fixed volume
• No fixed shape

Click on any of the tabs below to explore more information

Processes

Involving

Cycles (P5 & 6) Textbook Chapter 3

CHANGES IN STATE

pROCESSES WHERE HEAT IS lOST

pROCESSES WHERE HEAT IS GAINED

take place at ANY temperature

Evaporation

Condensation

only take place at FIXED temperatures

bOILING

vIEW gRAPH

fREEZING

vIEW gRAPH

Melting

vIEW gRAPH

Ready to test yourself?

Test #1:

The changes of state of water

Copy down the following in your Biology Book. Then, fill in the blanks in your Biology Book. When you're ready, click on the lines to check your answers.

Evaporation is

Freezing is

Condensation is

Melting is

Boiling is

The processes involving heat gain are:

The processes involving heat loss are:

The difference between freezing and melting is

The difference between boiling and evaporation is

The similarity between evaporation and condensation is

The similarity between boiling and freezing is

bOILING GRAPH

Click on any of the '?' buttons in the graph below for more information about it!

The graph shows the change in temperature when water which was initially at room temperature, was heated to boiling point, then left to cool.

• Water is heated from 0 min to 5 min
• Boiling takes place from 5th min to 20th min
• At 20 min, heating stops, so boiling stops
• Water cools down from 20th min to 35th min
• Water returns to room temperature at 35th min
• Evaporation takes place throughout the entire experiment, but only at the water surface. At the 5th to 20th min, boiling is the main process.

Temperature (°C)

100

28

Time (min)

Click to return to Processes:

20

35

melting GRAPH

Click on any of the '?' buttons in the graph below for more information about it!

The graph shows the change in temperature when a cup of ice was left at room temperature.

• Ice melts from 0 min to 10 min
• Melting takes place from 0 min to 10 min.

• At the 10th min, all ice has melted.
• Water warms up from 10th min to 25th min
• Water returns to room temperature at 25th min
• Evaporation can take place as long as there is liquid present, but only at the water surface. At 0 min to 10 min, melting is the main process.

Temperature (°C)

28

Time (min)

Click to return to Processes:

25

10

FREEZING GRAPH

Click on any of the '?' buttons in the graph below for more information about it!

The graph shows the change in temperature when water was placed in a freezer to be frozen.

• Water is cooled from 0 min to 20 min
• Freezing takes place from 20th min

• Evaporation can take place throughout the entire experiment as long as there is liquid present, but only at the water surface. From the 20th min, freezing is the main process.

Temperature (°C)

28

Time (min)

Click to return to Processes:

20

wHAT Are Cycles?

Cycles (P3 & 4) Textbook pg IV (before pg 1)

A cycle is a series of events that are repeated in the same order

Info

Click on any of the arrows or words in the cycle for more information!

test yourself!

Clouds

Water Vapour

RAIN

Water bodies

Test #2:

Check your answer:

The Water Cycle

Drag and drop the post-its below to form the water cycle correctly. Check your answer by clicking on the tick icon right next to these instructions!

RAIN

Clouds

WATER bODIES

liquid

WATER VAPOUR

liquid

gas

heat isgained!

heat islost!

Condensation

Evaporation

liquid

Water is precious because it is a limited resource and...

all living things need water to survive.

Summary

Click on any of the moving components below to explore more information!

Water Cycle

Water Cycle & Changes of State

Changes of State

A series of events that is repeated in the same order

EVAPORATION

Evaporation is where liquid gains heat and changes to gas at any temperature

[heat loss]

Condensation

Condensation is where warmer gas touches a cooler surface, loses heat and changes to liquid at any temperature

Clouds

CONDENSATION

(liquid)

MELTING

Melting is where solid gains heat and changes to liquid at a fixed temperature

BOILING

Boiling is where liquid gains heat and changes to gas at a fixed temperature

(liquid)

(gas)

Water Vapour

RAIN

[heat gain]

Water bodies

EVAPORATION

FREEZING

Freezing is where liquid loses heat and changes to solid at a fixed temperature

(liquid)

Get your bio books ready!

Click the '>' button on the right side of this slide to access practice questions. Click on this button to review the answers once you are done to check if you've gotten the answer right!

Process SkillS: Observing, Analysing

The drawings below show a pair of goggles Matthew used for swimming. He observed his lens fogging up when he wore it underwater, preventing him from seeing clearly.

Diagram 1

Diagram 2

a) Draw in Diagram 2 above to show which side of the lens the water droplets would be formed on.

b) Explain how the water droplets were formed.

Process SkillS: Analysing, Inferring

Ruby placed a hot water at 80°C on an electronic scale. She noted the reading on the electronic scale at the start of the experiment as shown below.

Which of the following shows the reading on the electronic scale after ten minutes and the correct explanation for the observation?

(1) (2) (3) (4)

Process SkillS: Observing

The diagram shows the water cycle.

Which of the following shows the correct state of matter of water at A and B?

(1) (2) (3) (4)

Process SkillS: Observing, Analysing, EVALUATING

Jessie heated some ice cubes in a pan. After some time, the ice cubes melted. She continued to heat it until the water started to boil. She then observed clouds forming above the pan. She turned off the flame and covered the pan with a lid. She then plotted a graph from the results of the experiment below.

a) Which parts of the graph, AB, BC, CD or DE, show heat gain by the contents of the pan?

b) Jessie also observed small water droplets on the underside of the lid. After some time, the water droplets stopped forming. Explain why.

c) What would happen to the volume of the water from D to E? Give a reason.

Process SkillS: Comparing, Analysing, EVALUATING

Jernise conducted an experiment using 2 identical blocks of ice. She placed each block of ice in a beaker, then placed the beakers in two different locations of different temperatures.

She then removed the ice blocks after 15 minutes and measured the amount of liquid collected in the beaker. She recorded her results below.

Explain why there was less liquid collected in set-up P than in set-up Q.

Good effort!

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