What is the water cycle and why is it important?
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The water cycle is the process by which water moves through the Earth’s atmosphere, land, and oceans. It includes evaporation, condensation, precipitation, and collection. It is important because it helps distribute water to plants, animals, and people.
Why do plants need sunlight to grow?
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Plants need sunlight to make their own food through a process called photosynthesis. Sunlight provides the energy plants use to turn water and carbon dioxide into oxygen and glucose, which helps them grow.
What are the three states of matter?
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The three main states of matter are solid, liquid, and gas. Solids have a fixed shape, liquids take the shape of their container, and gases spread out to fill any space.
How does gravity affect objects on Earth?
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Gravity is a force that pulls objects toward the center of the Earth. It keeps us on the ground, makes things fall when dropped, and causes planets to orbit the sun.
What is the difference between a plant cell and an animal cell?
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Plant cells have a cell wall and chloroplasts which help them make food using sunlight, while animal cells do not have these. Both have a nucleus and other parts, but plant cells are generally more rigid.
Why do we see different phases of the Moon?
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We see different phases of the Moon because of its position relative to the Earth and the Sun. As the Moon orbits Earth, we see varying amounts of its sunlit side, creating phases like new moon, crescent, and full moon.
