3rd Grade ICSE

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09. Water As A Resource

Image Based Questions

Prepared by: learnloophq@gmail.com

Last edited 37 days ago by Learn LoopHQ.

Chapter: 09. Water As A Resource

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Question 1

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Identify the processes shown by arrows in the diagram.

Explain what causes the water to rise into the sky from the ocean.

What forms in the sky as a result of water vapour cooling, and what is that process called?

Where does the water typically go after falling from the sky in this cycle?

The processes shown by arrows in the diagram are Evaporation (water turning to vapour and rising), Condensation (vapour forming clouds), Precipitation (water falling as rain/snow), and Collection/Runoff (water gathering in bodies or flowing).

The water rises into the sky from the ocean due to the warmth of the Sun. The Sun’s heat causes the liquid water to turn into water vapour, which is a gas, and this lighter vapour then rises into the atmosphere. This process is known as evaporation.

As water vapour rises higher in the sky, it cools down. This cooling causes the water vapour to change back into tiny liquid water droplets, which then combine to form visible clouds. This transformation of gas into liquid upon cooling is called condensation.

After falling from the sky as precipitation (rain or snow), the water typically collects in various water bodies such as rivers, lakes, and oceans. Some of it also seeps into the ground to become groundwater. From these collection points, the water can then evaporate again, continuing the cycle.

Question 2

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What water purification method is being demonstrated in the picture?

Why is this method important for making water fit for use?

What type of impurities would this method primarily remove from the water?

Can water purified by this method be considered completely safe for drinking without further treatment? Explain why or why not.

The water purification method being demonstrated in the picture is filtration. The dirty water is being passed through a filtering material, which traps larger particles and allows cleaner water to pass through into the receiving glass.

This method is important for making water fit for use because it physically removes visible dirt, sediment, and other insoluble impurities that make water cloudy or unpleasant to drink. It is a crucial first step in many purification processes, as it improves the water’s appearance and helps other purification methods work more effectively.

This method would primarily remove insoluble impurities from the water. These are impurities that do not dissolve in water, such as sand, mud, tiny stones, twigs, and other suspended particles that can be seen or felt.

Water purified solely by filtration, especially simple home filtration, cannot be considered completely safe for drinking. While filtration removes visible dirt, it does not remove dissolved impurities or, more importantly, microscopic germs that can cause waterborne diseases. Further treatment like boiling or chlorination would be necessary to kill these harmful organisms and make the water safe for consumption.

Question 3

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Identify the three states of water depicted in the image, corresponding to Panel 1, Panel 2, and Panel 3.

Which process causes water to change from the state shown in Panel 2 to Panel 1?

What is the process called when water changes from the state in Panel 2 to the state in Panel 3?

Describe one key difference in the observable properties of water between the state in Panel 1 and Panel 2.

The three states of water depicted in the image are: Panel 1 shows water in its solid state (ice cubes), Panel 2 shows water in its liquid state (a glass of water), and Panel 3 shows water in its gaseous state (steam rising from boiling water).

The process that causes water to change from the liquid state (Panel 2) to the solid state (Panel 1) is called freezing. This occurs when liquid water is cooled down to a specific temperature, typically 0 degrees Celsius, causing its molecules to slow down and arrange into a rigid structure.

The process called when water changes from the liquid state (Panel 2) to the gaseous state (Panel 3) is evaporation. In Panel 3, specifically, this is boiling, which is a rapid form of evaporation where liquid water is heated to its boiling point and quickly turns into water vapour or steam.

One key difference in the observable properties between the solid state (Panel 1) and the liquid state (Panel 2) is their shape and volume. Ice (solid) has a definite shape and a definite volume, maintaining its form. Liquid water (Panel 2), on the other hand, has a definite volume but takes the shape of its container, meaning it does not have a fixed shape of its own.

Question 4

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What water conservation method is illustrated in this picture?

Explain how this system works to save water.

Why is implementing such a system important for communities, especially during certain times of the year?

List two potential uses for the water collected by this system.

The water conservation method illustrated in this picture is rainwater harvesting. This system is designed to collect and store rainwater for later use, preventing it from simply running off and being wasted.

This system works by channeling rainwater that falls on the slanted roof into gutters. These gutters then direct the collected rainwater into a large storage container, which in this case is a blue rain barrel placed next to the house. The barrel is equipped with a tap at the bottom, allowing the stored water to be easily accessed when needed.

Implementing such a system is important for communities because it provides an alternative source of water, which is particularly crucial during periods of water scarcity or drought. It helps reduce reliance on municipal water supplies or groundwater, contributing to overall water security and sustainability, especially when rainfall is seasonal or unpredictable.

Two potential uses for the water collected by this system are for non-potable purposes like watering garden plants or for washing and cleaning tasks around the house. It can also be purified for drinking purposes during times of severe scarcity.

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