The Earth in the Solar System - Worksheets

 CBSE Worksheet 01

Ch-12 The Earth in the Solar System

  1. How many days does it take the earth to travel around the sun?
    1. 541
    2. 120
    3. 365
    4. 20
  2. Match the following planets with their respective number of moons:
    a. MarsI. 17
    b. JupiterII. 2
    c. UranusIII. 16
    1. a(I), b(II), c(III)
    2. a(II), b(III), c(I)
    3. a(II), b(I), c(III)
    4. a(III), b(II), c(I)
  3. Solar is ________.
    1. related to the moon
    2. related to the earth
    3. related to space
    4. related to the sun
  4. What is the closest planet to the Sun?
    1. Earth
    2. Mars
    3. Mercury
    4. Venus
  5. The term “Blue Planet” indicates presence of ________.
    1.  land
    2.  water
    3.  oxygen
    4. all of these
  6. Match the following:
    Column AColumn B
    (i) Milky way(a) Rings.
    (ii) Venus(b) Star.
    (iii) Sun(c) Evening star.
    (iv) Saturn(d) Galaxy.
  7. Fill in the blanks:
    1. A group of ________ forming various patterns is called a ________.
    2. Asteroids are found between the orbits of ________ and ________.
    3. The small bear constellation is better known as the ________.
    4. Stars are celestial bodies that are ________ and ________.
  8. State true or false:
    1. Saturn is the only planet that has rings around it.
    2. Pluto is a dwarf planet.
    3. All the planets move around the sun in an elongated path.
    4. Geoid means an earth-like shape.
  9. How does earth support life?
  10. Name the inner planets of our solar system.
  11. What are the stars and why can’t all celestial bodies call stars?
  12. What do you know about dwarf planets?
  13. Which is the biggest member of the Solar System? Discuss it.
  14. Differentiate between a Planet and a Satellite.

CBSE Worksheet 01
Ch-12 The Earth in the Solar System

Solution

  1. (c) 365
    Explanation: The Earth takes 365 days to complete one round along its orbit around the sun.
  2. (b) a(II), b(III), c(I)
    Explanation: EARTH - Number of moons - 1.
    MARS - Number of moons - 02
    JUPITER - Number of moons - 16
    SATURN - Number of moons - about 18
    URANUS - of moons - about 17
  3. (d) related to the sun
    Explanation: ‘Sol’ in Roman mythology is the ‘Sungod’. ‘Solar’ means ‘related to the sun’. The family of the sun is, therefore, called the solar system.
  4. (c) Mercury
    Explanation: Mercury is nearest to the sun. It takes only about 88 days to complete one round along its orbit.
  5. (b) water
    Explanation: From the outer space, the earth appears blue because its two-thirds surface is covered by water. It is, therefore, called a blue planet.
  6. (i) - (d), (ii) -(c), (iii) - (b), (iv) - (a).
    1. Stars, constellation
    2. Mars and Jupiter
    3. Saptarishi
    4. big, hot
    1. False (Jupiter, Saturn, and Uranus have rings around them)
    2. True
    3. True
    4. True
  9. The earth has conditions that support life. It is neither too hot nor too cold. It has both water and air, which are both indispensable for life. The presence of oxygen in the air inappropriate proportion supports life. These factors make the earth a unique planet.
  10. The inner of our solar system are Mercury, Venus, Earth and Mars.
  11. The celestial bodies that have their own light and heat and they emit it in large amounts are called stars. They are generally big in size and hot. They are made up of gases. For example, the sun is a star.
    Every celestial body doesn’t have their own light and heat, that’s why we can’t call them stars. They are lit by the light of the stars. For example, planets.
  12. This definition was made on August 24, 2006, by the International Astronomical Union (IAU), and can be described as, a dwarf planet is a body orbiting the Sun that is big enough to round itself by its own gravity, but has not cleared its orbital path of other rival bodies. A dwarf planet is a planetary-mass object that does not dominate its region of space and is not a satellite.
  13. The Sun is the biggest member of the Solar System. It is in the centre of the solar system. It is made of extremely hot gases and is the source of all heat and light energy. It is a million times larger than our Earth. All kinds of life require radiation from the Sun for their existence. The Earth would grow cold and lifeless without solar energy.
  14. PlanetSatellite
    1. Planets receive heat and light from the Sun around which they revolve.1. The Satellites revolve around their planets. They too have no fight of their own but only reflect the light received from the Sim.
    2. Planets have a spherical body.2. Satellites are relatively small bodies.
    3. There are nine major planets, our Earth is also one of them.3. There are only 57 satellites in our Solar System.
    4. A planet is called a ‘Wanderer’.4. A satellite is called a moon. It also means a smaller companion.
    5. Planets move around the Sun.5. Satellites revolve around the planets and accompany them in their revolution around the Sun.