The Universe and Solar System-Motion of earth and different spheres of earth.

Revolution and Rotation of earth. How seasons and day and night happen.

Learner's Guide

Objectives:

  • What are different type of motion that earth performs?
  • What are the effects of motion of earth?
  • What are different components of earth?

 

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Motion of earth:

 

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Why does earth move around the Sun? What will happen if it does not move?

Show|Hide Answer

Answer:

  • 2 objects with weight always attract each other.
  • If weight is more, attraction between objects will be more.
  • Sun and earth attract each other.
  • Since mass of sun and earth is more, there is strong attraction force between them.
  • By moving around the sun, earth prevent from dropping in the sun.

 

Effects of revolution of earth:

 

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Components of earth:

Tip: Think before answering.

  • In a leap year, there are __________ days?

    1. 365
    2. 366
    3. 364
    4. 360
    Difficulty Level: Easy
  • All the water on earth is part ______________

    1. Lithosphere
    2. Hydro sphere
    3. Atmosphere
    4. Bio sphere
    Difficulty Level: Easy

    Hydro sphere

  • We experience different seasons because _____________

    1. Revolution of earth
    2. Tilt of earth around it's axis
    3. Rotation of earth
    4. Sun
    Difficulty Level: Easy

    Tilt of earth around it's axis

  • We experience day and night  because _____________

    1. Revolution of earth
    2. Tilt of earth around it's axis
    3. Rotation of earth
    4. Light
    Difficulty Level: Moderate

    Rotation of earth

  • Priya is 12 years old. How many times she would have revolved around the Sun?

    Difficulty Level: Moderate

    Earth complete one round around sun in 365 days and 6 hours. Which is also known as a year.

    So in 12 years, earth will complete 12 rounds around the sun.