All questions of Water on Earth for Grade 2 Exam

The drops of water that fall from the sky when it rains are called raindrops. Snowflakes are different and fall as snow, dew drops are the ones on leaves in the morning, and water drops is a general term.

Dam

A glass of water doesn't have a specific shape because it takes the shape of the container it's in. It's a liquid that fills up the space inside the glass.

Importance of Water for Plants
Water is essential for plants for several reasons, and it plays a crucial role in their survival and growth.
1. Photosynthesis
- Water is vital for the process of photosynthesis, where plants convert sunlight into energy.
- During photosynthesis, plants take in carbon dioxide from the air and water from the soil to produce glucose and oxygen.
2. Nutrient Transport
- Water helps in transporting nutrients and minerals from the soil into the plant.
- It acts as a solvent, allowing essential nutrients to dissolve and be absorbed through the roots.
3. Turgor Pressure
- Water helps maintain turgor pressure in plant cells, which keeps them rigid and upright.
- This pressure is crucial for maintaining the plant’s structure and preventing wilting.
4. Temperature Regulation
- Water plays a role in regulating the temperature of plants.
- Through the process of transpiration, plants release water vapor which cools them down.
5. Cellular Functions
- Water is involved in various cellular processes within the plant.
- It is necessary for biochemical reactions and helps in the overall functioning of the plant cells.
In conclusion, while the idea of plants "breathing" may sound unusual, they indeed require water to absorb carbon dioxide and carry out vital processes that sustain their life. Thus, option 'B' is the correct answer, emphasizing the importance of water for plant health and growth.

C

Water is a clear, colorless liquid that we drink. It's important for our bodies and helps us stay healthy. It's not a type of food, toy, or clothing.

When we freeze water, it becomes solid ice. Ice is the frozen form of water and feels cold and hard. It doesn't turn into steam or a gas when we freeze it.

A rubber ball can float on water because it's light and can stay on the surface. Rocks and heavy books will sink, while feathers are very light but might also sink.

We use water to drink by putting it in a cup or glass and sipping it. Pouring it on the floor, swimming in it, and using it for coloring are not the usual ways we use water for drinking.

When water gets very hot, it turns into steam, which is a kind of gas. It doesn't become ice or disappear.

The tiny drops of water we see on leaves in the morning are called dew. They form when the air is cool and the moisture in the air condenses on surfaces like leaves.

Taking a bath is an activity that uses water to clean ourselves. We use water, along with soap, to wash away dirt and stay clean. Painting, playing, and sweeping don't usually involve water for cleaning.