Look at the following diagram and answer the following question. What happens when the girl in the picture blows on the mirror?

On blowing air from the mouth on the mirror, the mirror becomes moist. The air blown from the mouth is hot and the mirror is cold. The hot air we breathe out contains water vapor which turns into tiny droplets of water when it comes in contact with the colder mirror. Due to this mirror becomes moist and hazy. The air blown from the mouth is wet.

Look at the following diagram and answer the following question. What will happen if she rubs her finger on it?

On blowing air from the mouth on the mirror, the mirror becomes moist and cloudy. When we rub it with our finger we will get a clear mirror again as the condensed water vapor gets evaporated and we will get a clear mirror.

Look at the diagram given below and answer the following question: What does this diagram represent?

This diagram represents the water cycle, which is the continuous circulation of water from the Earth's surface to the air and from the air back to the Earth's surface. The water cycle is essential for life on Earth, as all living organisms need water to grow and survive. The water cycle purifies water. It also influences the climatic conditions all over the world.

Look at the diagram given below and answer the following question: Name the process that causes the formation of clouds.

Clouds are formed by the process of evaporation and condensation. On hot days, water evaporates from water bodies and rises in the air. Hot air carrying water vapor rises. Later, it cools down as it goes up. This cooling causes condensation of water vapor, which leads to the formation of tiny droplets. These tiny droplets grow bigger and heavy with more condensation which ultimately leads to the formation of clouds.

Look at the diagram given below and answer the following question: Name the process that causes the formation of water vapour.

Water vapour enters into the air through the following process: Evaporation: Water from seas, oceans and other water bodies evaporates due to heat from the Sun. This water vapour formed mixes with the air. Transpiration: Plants also lose water from their leaves through the process of transpiration. It is the process of loss of water by plants in the form of water vapour. This water vapour formed mixes with the air. Respiration: Plants and animals also release water vapour during respiration.

Look at the diagram given below and answer the following question: Is water in the rivers more saline than the water in seas and oceans?

No, water in the seas and oceans is more saline than the water in rivers. The rainwater flowing over the land dissolves salts and minerals and reaches into rivers. The river water flowing into the seas brings with it large quantities of salt which makes seawater more saline. It is unfit for drinking and irrigation purposes.

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ICSE Chemistry>Chapter 5 - Water>TEST Yourself

Shalini Mahajan and Nishi Arora Solutions for Chapter: Water, Exercise 4: TEST Yourself

Author:Shalini Mahajan & Nishi Arora

Shalini Mahajan Chemistry Solutions for Exercise - Shalini Mahajan and Nishi Arora Solutions for Chapter: Water, Exercise 4: TEST Yourself

Attempt the free practice questions on Chapter 6: Water, Exercise 4: TEST Yourself with hints and solutions to strengthen your understanding. ICSE Chemistry solutions are prepared by Experienced Embibe Experts.