Question

Question 129(i)

Astronomy The table shows the mass of the planets, the Sun and the Moon in our solar system.



Write the mass of each planet and the Moon in scientific notation.

Answer 1

Mass of each planet and Moon in scientific notation is given below.
Using law of exponents, $a^m\times a^n=a^{m+n}$
$\text{Sun}=199\times {10}^{28}=1.99\times {10}^{28}\times {10}^2=1.99\times {10}^{30}\text{Mercury}=33\times {10}^{22}=3.3\times {10}^{22}\times {10}^2=3.3\times {10}^{23}\text{Venus}=487\times {10}^{22}=4.87\times {10}^{22}\times {10}^2=4.87\times {10}^{24}\text{Earth}=597\times {10}^{28}=5.97\times {10}^{22}\times {10}^2=5.97\times {10}^{24}\text{Mars}=642\times {10}^{27}=6.42\times {10}^{27}\times {10}^2=6.42\times {10}^{29}\text{Jupiter}=19\times {10}^{26}=1.9\times {10}^{26}\times 10=1.9\times {10}^{27}\text{Saturn}=568\times {10}^{24}=5.68\times {10}^{24}\times {10}^2=5.68\times {10}^{26}\text{Uranus}=868\times {10}^{23}=8.68\times {10}^{23}\times {10}^2=8.68\times {10}^{25}\text{Neptune}=102\times {10}^{24}=1.02\times {10}^{24}\times {10}^2=1.02\times {10}^{26}\text{Pluto}=127\times {10}^{20}=1.27\times {10}^{20}\times {10}^2=1.27\times {10}^{22}\text{Moon}=795\times {10}^{20}=7.95\times {10}^{20}\times {10}^2=7.95\times {10}^{22}$