Question

1. the diagram below represents earth as viewed from space. letter a represents the angle of tilt of earths rotational axis. line xy is perpendicular to the plane of earths orbit.

what is the value of the angle represented by letter a?
(1) 23.49° (2) 177.4° (3) 6.68° (4) 15.0°

1. the diagram below represents two planets in our solar system drawn to scale, jupiter and planet a.

planet a most likely represents
(1) venus (2) saturn (3) uranus (4) earth

1. which planet is approximately 30 times farther away from the sun than earth is?

(1) neptune (2) jupiter (3) uranus (4) saturn

Explanation:

Question 18

Step1: Recall Earth's axial tilt

Earth's rotational axis is tilted at an angle of approximately \(23.5^{\circ}\) relative to the perpendicular to the plane of its orbit.

Step1: Compare planet sizes

Jupiter is the largest planet. Saturn is the second - largest planet in the solar system. Venus and Earth are much smaller (terrestrial planets), and Uranus is smaller than Saturn.

Step1: Know the average distances from the Sun

The average distance of Earth from the Sun is about 1 AU. Neptune is at an average distance of about 30 AU from the Sun, Uranus is at about 19.2 AU, Jupiter at about 5.2 AU, and Saturn at about 9.5 AU.

Answer:

(1) \(23.49^{\circ}\)

Question 19