Worksheet 14: Class 6 Science - Water

Welcome! This worksheet is all about water, one of the most important resources on Earth. We will learn about the different forms of water, where we find it, and the amazing cycle that keeps it moving. Let's dive in!

Water on Earth and the Water Cycle

About two-thirds of the Earth's surface is covered with water, but most of this is in oceans and seas, which is not suitable for drinking. The water we use comes from sources like rivers, lakes, ponds, and groundwater.

Water exists in three states: **solid** (ice, snow), **liquid** (water), and **gas** (water vapor). The constant movement of water between these states in nature is called the **water cycle**.

Here are the main steps of the water cycle: [attachment_0](attachment)

• **Evaporation:** The process by which water turns into water vapor due to heat from the sun.
• **Transpiration:** The process by which plants release excess water into the air as water vapor.
• **Condensation:** The process where water vapor cools down and turns back into tiny water droplets, forming clouds.
• **Precipitation:** When the clouds become too heavy, the water falls back to Earth in the form of rain, snow, or hail.

The water cycle ensures that water is continuously recycled. It's a closed system with no new water being created. This is why it's so important to conserve water and prevent wastage.

Practice Questions

1. Fill in the blank: The process of water turning into vapor is called _____.

Evaporation

2. True or False: About two-thirds of the Earth's surface is land.

False. About two-thirds of the Earth's surface is covered with water.

3. Match the state of water with its example:

(a) Solid (i) Water vapor

(b) Liquid (ii) Ice

(c) Gas (iii) Rain

a - ii, b - iii, c - i

4. What is the difference between evaporation and condensation?

**Evaporation** is when water turns into gas (water vapor) due to heat. **Condensation** is when water vapor cools down and turns back into liquid water.

5. Fill in the blank: The falling of water from clouds in the form of rain or snow is called _____.

Precipitation

6. Why is rainwater an important part of the water cycle?

Rainwater replenishes our rivers, lakes, and groundwater, which are our main sources of usable water.

7. Name the three main states of water.

Solid, Liquid, and Gas.

8. What is transpiration?

Transpiration is the process by which plants release excess water from their leaves into the air as water vapor.