Class # 06 , Science ; Unit # 12 .

 1.Define solar system. write the names of the inner and outer planets. 

Ans; 

Solar System:

The solar system includes the Sun, planets, moons, and other celestial objects that orbit the Sun.

Inner Planets:

1. Mercury
2. Venus
3. Earth
4. Mars

Outer Planets:

1. Jupiter
2. Saturn
3. Uranus
4. Neptune

2.what is the difference between an asterid and a comet ?

ANS;' Asteroid: Rocky, no tail, mostly in the Asteroid Belt

..Comet: Icy, forms a tail near the Sun, found in Kuiper Belt or Oort Cloud. 

3. Where are the most asteriods found? 

Ans; Most asteroids are found in the Asteroid Belt between Mars and Jupiter.

4. Which planet in our solar system has the shortest year? Give reasons. 

Ans; Mercury has the shortest year (88 Earth days) because it is the closest planet to the Sun, so its orbit is the smallest and fastest.

5. Give any three uses of weather satellites? 

Ans; 1.Track weather patterns: Monitor storms, clouds, and temperature changes.

2.Predict weather: Help in forecasting weather conditions.

3.Monitor climate change: Track long-term climate shifts and environmental changes.

6. Why is venus hotter than Mercury even through Mercury is closer to the sun ?

ANS; Venus is hotter than Mercury because of its thick atmosphere that traps heat (greenhouse effect), while Mercury has no atmosphere to retain heat.

7. Venus is about the same size as the earth and not far away from earth compared to other planets. Why is venus unable to support any life forms. 

ANS ; Venus can't support life due to its extremely thick atmosphere, which causes extreme heat (over 900°F) and acid rain, making it uninhabitable.