Page 90 - ACTIVE SCIENCE 4 TOC

Factual Study

• The sun is so huge that about one million earths can fit into it.
• The highest mountain in the solar system is on Mars. It is called Olympus Mons and is three

times higher than Mount Everest.

Activity 10.2

Arrange the planets of solar system in the right order in your notebook.

Let’s Recapitulate

State whether the following statements are true or false.
1. The earth not only revolves along its orbit but also rotates on its own axis. ______

2. Meteors are small twinkling objects in the sky which
can be seen only at night. ______

3. The equator is drawn at a different distance from the
North and South Poles. ______
4. The earth takes 365 days or one year to complete one revolution around
the sun in its orbit. ______

LET’S
REVISE

• In our solar system, the eight planets and their moon revolve around the sun.
• The sun is a huge ball of hot gases which provides energy to all the living things on

earth. It is situated at the centre of the solar system.
Let’s Pronounce Together
• Earth is the only planet which supports life. It is the

third closest planet to the sun and one moon moves planets satellites
around it. About 70% of earth is covered with water. equator dwarf
planet

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Active Science-4