Our Planet- The Earth — Flashcards

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Earth is called the 'Blue Planet' because about three-fourths of its surface is covered with water. From space, it looks blue because of the oceans.

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The three essentials of life on Earth are air, water, and sunlight. These help all living things like humans, animals, and plants to survive.

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The atmosphere is a layer of air that surrounds the Earth. It is made up of gases like oxygen, nitrogen, and carbon dioxide, which are important for life.

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We need oxygen to breathe. Both humans and animals use oxygen from the air to stay alive.

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Plants use carbon dioxide from the air to make their food in a process called photosynthesis. This happens in the presence of sunlight.

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Water exists in three forms on Earth: liquid (like in rivers), solid (like ice), and gas (like water vapour in the air).

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Without water, no living thing can survive. We cannot live for more than a few days without water. Plants and animals also need water to live.

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Sunlight gives us light and heat. It helps keep the Earth warm, helps plants grow, and gives energy to all living things.