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This is the last chapter of your Grade 8 journey. It is time to put together everything you have learnt. Why is our home, planet Earth, like no other place we know? Let us begin to uncover its secrets.
What makes Earth different from other planets?
- Earth is a planet that orbits the Sun.
- But it is not just any planet — it sustains life.
- It has mountains, oceans, deserts and forests.
- So it is full of diverse landscapes that support living beings.
How do satellite images help us study Earth?
- The cover image was taken by an ISRO Earth Observation Satellite.
- It was made by combining nearly 3000 smaller images.
- It is a false-colour image, using colours to show different information.
- So satellites help study plants, oceans, temperature and oil spills.
Example:
A false-colour satellite image is like a heat-map on a weather app, where colours stand for different readings, not real colours.
Important Points
- Earth is a planet that orbits the Sun and sustains life.
- Satellites give us amazing pictures of our planet.
- This chapter uncovers the conditions that make Earth a home.
ā Test Yourself
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Who took the cover image of Earth?
View Answer
An ISRO Earth Observation Satellite. -
What is a false-colour image?
View Answer
An image where scientists use different colours to show different types of information. -
Name two things satellites can detect.
View Answer
Ocean temperature and oil spills (also wind direction and plants). -
Does Earth orbit the Sun?
View Answer
Yes, Earth is a planet that orbits the Sun. -
What makes Earth special among planets?
View Answer
It sustains life and has diverse landscapes.
Important Definitions
- False-colour image — a picture where colours are used to show different kinds of information, not real colours.
- ISRO — the Indian Space Research Organisation, which makes satellites and space missions.
