Flash Cards
1/19
What is air?
Air is a mixture of gases that surrounds the Earth, essential for life. It includes nitrogen (78%), oxygen (21%), and other gases (1%).
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2/19
Why do we need oxygen?
Oxygen is vital for breathing and essential for the survival of most living organisms.
3/19
What is the main source of energy for life on Earth?
The Sun is the main source of energy for all living organisms on Earth.
4/19
What are renewable resources?
Renewable resources are natural resources that can be replenished naturally over time, such as air, water, and forests.
5/19
What are non-renewable resources?
Non-renewable resources are those that do not replenish within a reasonable time, such as fossil fuels and minerals.
6/19
What is water harvesting?
Water harvesting is the collection and storage of rainwater to use it later, helping to conserve water.
7/19
What is the composition of air?
Air is composed of approximately 78% nitrogen, 21% oxygen, and 1% other gases such as argon and carbon dioxide.
8/19
How do plants use sunlight?
Plants use sunlight to perform photosynthesis, allowing them to produce their food.
9/19
What is a firki?
A firki is a paper pinwheel that spins when blown by wind, demonstrating how wind energy works.
10/19
Why is soil important?
Soil supports plant growth, holds nutrients, and provides habitat for many organisms.
11/19
What is the significance of forests?
Forests are vital for biodiversity, providing habitat, food, and oxygen for living organisms.
12/19
What are fossil fuels?
Fossil fuels are non-renewable resources formed from the remains of ancient plants and animals, used as energy sources.
13/19
How can we reduce water wastage?
We can reduce water wastage by fixing leaks, using water-efficient fixtures, and harvesting rainwater.
14/19
What human activity contributes to water pollution?
Throwing trash and waste materials into water bodies pollutes freshwater sources.
15/19
What role do trees play in the environment?
Trees provide oxygen, reduce carbon dioxide, and help maintain the water cycles and soil quality.
16/19
What is the Chipko movement?
The Chipko movement was an effort to protect trees by hugging them, initiated in Uttarakhand, India.
17/19
What can we do to combat air pollution?
We can reduce air pollution by using public transport, walking, using electric vehicles, and minimizing fossil fuel use.
18/19
What is dynamic equilibrium in ecosystems?
Dynamic equilibrium refers to the balance in ecosystems, where resources are consumed and replenished sustainably.
19/19
Why should we conserve natural resources?
Conserving natural resources ensures that they are available for future generations and helps protect the environment.
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