Astronomy: The table shows the mass of the planets, the sun and the moon in our solar system.

(a) Write the mass of each planet and the Moon in scientific notation.
(b) Order the planets and the moon by mass, from least to greatest.
(c) Which planet has about the same mass as earth?

Solution:

(a) We have to write the mass of each planet and the Moon in scientific notation

Given, Sun = 1,990,000,000,000,000,000,000,000,000,000 = 1.99 × 10³⁰

Mercury = 330,000,000,000,000,000,000,000 = 3.3 × 10²³

Venus = 4,870,000,000,000,000,000,000,000 = 4.87 × 10²⁴

Earth = 5,970,000,000,000,000,000,000,000 = 5.97 × 10²⁴

Mars = 642,000,000,000,000,000,000,000,000,000 = 6.42 × 10²⁹

Jupiter = 1,900,000,000,000,000,000,000,000,000 = 1.9 × 10²⁷

Saturn = 568,000,000,000,000,000,000,000,000 = 5.68 × 10²⁶

Uranus = 86,800,000,000,000,000,000,000,000 = 8.68 × 10²⁵

Neptune = 102,000,000,000,000,000,000,000,000 = 1.02 × 10²⁶

Pluto = 12,700,000,000,000,000,000,000 = 1.27 × 10²²

Moon = 73,500,000,000,000,000,000,000 = 7.35 × 10²²

(b) We have to order the planets and the moon by mass, from least to greatest.

Pluto < Moon < Mercury < Venus < Earth < Uranus < Neptune < Saturn < Jupiter < Mars.

(c) We have to find a planet which has the same mass as earth.

From the above observation,

Venus has the same mass as earth.

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☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 12

NCERT Exemplar Class 8 Maths Chapter 8 Problem 129

Astronomy: The table shows the mass of the planets, the sun and the moon in our solar system. (a) Write the mass of each planet and the Moon in scientific notation, (b) Order the planets and the moon by mass, from least to greatest, (c) Which planet has about the same mass as earth?

Summary:

(a) The mass of each planet and the Moon in scientific notation is mentioned above, (b) The planets and the moon by mass arranged from least to greatest is mentioned above, (c) Venus has about the same mass as earth.

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