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Infographics:The Earth | Science for Class 3 PDF Download
The document Infographics:The Earth | Science for Class 3 is a part of the Class 3 Course Science for Class 3.
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FAQs on Infographics:The Earth - Science for Class 3
| 1. What is the Earth made of? |  |
Ans. The Earth is made up of several layers: the crust, mantle, outer core, and inner core. The crust is the thin outer layer where we live, the mantle is a thick layer of semi-solid rock, the outer core is liquid metal, and the inner core is a solid ball of iron and nickel.
| 2. How does the Earth rotate and revolve? | |
Ans. The Earth rotates on its axis, which is an imaginary line that runs from the North Pole to the South Pole. This rotation takes about 24 hours, resulting in day and night. Additionally, the Earth revolves around the Sun in an elliptical orbit, taking about 365.25 days to complete one full revolution, which defines a year.
| 3. Why is the Earth called the "Blue Planet"? | |
Ans. The Earth is often referred to as the "Blue Planet" because about 71% of its surface is covered by water, primarily in the form of oceans. This vast amount of water appears blue from space, giving the planet its nickname and highlighting its importance for life.
| 4. What are the different types of ecosystems found on Earth? | |
Ans. There are several types of ecosystems on Earth, including forests, grasslands, deserts, tundra, freshwater, and marine ecosystems. Each ecosystem has its own unique climate, plants, and animals that adapt to the environment, contributing to the planet's biodiversity.
| 5. How does human activity impact the Earth? | |
Ans. Human activities such as deforestation, pollution, and climate change significantly impact the Earth. These actions lead to habitat destruction, loss of biodiversity, and alterations in climate patterns, which can harm ecosystems and threaten the survival of many species, including humans.
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