Mars is known as earth’s sister planet. true false 2. the smallest planet is earth venus mercury uranus 3. the largest planet in our solar system is jupiter earth uranus saturn 4. the correct order of the planets is: mercury, venus, earth, mars, saturn, jupiter, uranus, neptune true false 5. earth is considered a “gas giant” true false 6. mars is know as the red planet? true false 7. spacecrafts have landed on the surface of which planet? saturn mars venus jupiter 8. the spot on jupiter is a volcano ocean storm unknown 9. this planet gets its blue-green color because its atmosphere is full of methane gas and hydrogen. earth venus uranus neptune