Fill in the Blanks TASK 2Online version TASK 2 by Cindy Carolina Jimenez 1 same Gravity frozen astrtonomical support nitrogen 1 . Most people think Mars can human life . 2 . We measure distances in space using units . 3 . The two planets aren't the colour . 4 . Most of the water on Mars is probably 5 . The air on Earth is mostly made up of 6 . on Mars is just over one third as strong as on Ear t