Q132 of 196 Page 249

The planet Uranus is approximately 2,896,819,200,000 metres away from the Sun. What is this distance in standard form?

Given, Distance of Uranus from the Sun = 2, 896, 819, 200, 000 metres

⇒ 2, 896, 819, 200, 000 = 2.8968192 × 10¹²

∴ In standard form, planet Uranus is approximately 2.8968192 × 10¹² metres away from the sun.

130

Investigating Solar System The table shows the average distance from each planet in our solar system to the sun.

(A) Complete the table by expressing the distance from each planet to the Sun in scientific notation.

(B) Order the planets from closest to the sun to farthest from the sun.

131

This table shows the mass of one atom for five chemical elements. Use it to answer the question given.

A. Which is the heaviest element?

B. Which element is lighter, Silver or Titanium?

C. List all five elements in order from lightest to heaviest.

133

An inch is approximately equal to 0.02543 metres. Write this distance in standard form.

134

The volume of the Earth is approximately 7.67 × 10^–7 times the volume of the Sun. Express this figure in usual form.