1 The inner four planets of our solar system are called the __________ planets and the next four are called the __________ planets.A) terrestrial, gas giant B) rocky, gas-like C) hard, soft D) gas giant, terrestrial 2 Which planets in the figure have solid surfaces?
(26.0K)A) 9 B) 5-8 C) 1-4 and 9 D) 1-4 3 Use the table to determine the largest terrestrial planet.Planet Orbital Radius, a (AU) Planetary Radius, r (km) Planetary Mass, m (1024 kg) Mercury 0.387 2439.7 0.3302 Venus 0.723 6051.8 4.8685 Earth 1.0 6378.1 5.9736 Mars 1.524 3397 0.64185 Jupiter 5.204 71 492 1898.6 Saturn 9.582 60 268 568.46 Uranus 19.201 25 559 86.832 Neptune 30.047 24 764 102.43 Pluto 39.236 1195 0.0125
A) Venus B) Mars C) Mercury D) Earth 4 Why is Venus the hottest planet, even though it isn't the closest to the Sun?A) it's greenhouse effect B) it's high albedo C) it's high atmospheric pressure D) it surfuric acid rain 5 Why can't astronomers directly observe the surface of Venus without landing probes on the surface?A) The surface is covered by thick clouds. B) Venus has a high albedo. C) Venus has a clockwise spin. D) The surface is covered by thick ice sheets. 6 What is Olympus Mons?A) a scarp on Mercury B) a composite volcano on Venus C) a large shield volcano on Mars D) one of Mars' moons 7 The wobble in Earth's axis is called __________.A) precession B) tilt C) eccentricity D) seasons 8 Mercury's extremely slow spin causes only __________ days to pass in __________ of Mercury's years.A) three, two B) one, two hundred C) one hundred, one D) twenty-four, one