Class 1 Exam > Class 1 Notes > Social Science for Class 1 > Worksheet Solutions: Air & Water - 2
Air and Water - 2 Class 1 Worksheet EVS
Q1: Multiple Choice Questions (MCQs).
(i) What do we need to breathe and live?
(a) Food
(b) Air
(c) Water
(d) Sunlight
Ans: (b)
We need air to breathe and live. Air contains oxygen which is essential for our body.
(ii) Which of the following is a source of water?
(a) Sun
(b) Moon
(c) Ocean
(d) Cloud
Ans: (c)
The ocean is a large body of water. It is one of the sources of water on Earth.
(iii) Which of these is NOT a way to keep the air clean?
(a) Planting trees
(b) Throwing garbage everywhere
(c) Using dustbins
(d) Using fewer vehicles
Ans: (b)
Throwing garbage everywhere can pollute the air and make it dirty.
(iv) Rain comes from:
(a) Clouds
(b) Sun
(c) Stars
(d) Moon
Ans: (a)
Rain is formed when water vapor in the clouds condenses and falls down as droplets.
(v) Air takes up space and has:
(a) Weight
(b) Color
(c) Smell
(d) Taste
Ans: (a)
Air has weight even though we can't see it. It pushes on things and takes up space.
Q2: True or False.
(i) Air is important for living things.
Ans: True - Air contains oxygen, which living things need to breathe.
(ii) All the water on Earth is salty.
Ans: False - Most of the water on Earth is in the oceans and is salty, but there's also freshwater in rivers, lakes, and underground.
(iii) We should throw garbage anywhere we like.
Ans: False - Proper disposal of garbage in dustbins helps in keeping the environment clean.
(iv) Fish can live only in saltwater.
Ans: False - Fish can live in both freshwater (like rivers and lakes) and saltwater (like oceans).
(v) We need air only at night.
Ans: False - We need air to breathe all the time, day and night.
Q3: Fill in the Blanks.
(i) We breathe in _______.
Ans: air
(ii) _______ is a source of freshwater.
Ans: River
(iii) We should use dustbins to keep the _______ clean.
Ans: environment
(iv) Water vapor in the air forms _______.
Ans: clouds
(v) We need _______ to live and grow.
Ans: water
Q4: Answer the Following.
(i) Why do we need air?
Ans: We need air to breathe and live. Air contains oxygen which our bodies need to survive.
(ii) Name one source of freshwater.
Ans: River
(iii) How can we keep the air clean?
Ans: We can keep the air clean by planting trees, using dustbins for garbage, and using fewer vehicles that release pollution.
(iv) What is rain?
Ans: Rain is formed when water vapor in the clouds condenses and falls down as droplets.
(v) Why is the sun important?
Ans: The sun is important because it provides warmth and light to the Earth. It helps plants grow and gives us energy.
The document Air and Water - 2 Class 1 Worksheet EVS is a part of the Class 1 Course Social Science for Class 1.
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FAQs on Air and Water - 2 Class 1 Worksheet EVS
| 1. Why is air and water important for life on Earth? |  |
Ans. Air and water are essential for life on Earth because they provide the necessary elements for survival. Air provides oxygen for breathing, which is essential for the respiration process in living organisms. Water, on the other hand, is crucial for hydration, maintaining body temperature, and supporting various metabolic processes in organisms.
| 2. How does pollution affect the quality of air and water? | |
Ans. Pollution significantly impacts the quality of air and water. Air pollution, caused by the release of harmful gases and particles into the atmosphere, can lead to respiratory issues, allergies, and even cardiovascular diseases in humans and animals. Water pollution, caused by the discharge of pollutants into water bodies, can contaminate drinking water sources, harm aquatic life, and disrupt ecosystems.
| 3. What are the main sources of air and water pollution? | |
Ans. The main sources of air pollution include industrial emissions, vehicle exhaust, burning of fossil fuels, and agricultural activities. These activities release pollutants such as carbon dioxide, sulfur dioxide, nitrogen oxides, and particulate matter into the atmosphere. Water pollution can be caused by industrial discharges, sewage and wastewater, agricultural runoff, and oil spills, which introduce pollutants like heavy metals, chemicals, and pathogens into water bodies.
| 4. How can we reduce air and water pollution? | |
Ans. There are several ways to reduce air and water pollution. To reduce air pollution, we can promote the use of renewable energy sources, such as solar and wind power, which produce minimal emissions. Additionally, implementing stricter emission standards for vehicles and industries, promoting sustainable transportation options, and reducing reliance on fossil fuels can help mitigate air pollution. To address water pollution, it is important to properly treat and manage wastewater, prevent industrial discharges, implement effective agricultural practices to minimize runoff, and educate the public about responsible waste disposal.
| 5. What are the consequences of ignoring air and water pollution? | |
Ans. Ignoring air and water pollution can have severe consequences for both the environment and human health. Continued exposure to polluted air can lead to respiratory diseases, decreased lung function, and increased risk of cardiovascular problems. Water pollution can result in the contamination of drinking water sources, leading to waterborne diseases and long-term health issues. Furthermore, pollution can harm ecosystems, disrupt the balance of ecosystems, and negatively impact biodiversity. It is crucial to address and mitigate air and water pollution to safeguard our health and the environment.
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Dec 22, 2024 Last updated |
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