Mission to Mars (Astronaut Girl, Bk. 4)

When Val's teacher gives her class a science assignment to build terrariums, Val can't wait to get started! She's picked Wallace and her two friends, Ling and Abby, to join her group, and she expects to be in charge...after all, she is Astronaut Girl! But Val soon discovers it's impossible for them to agree on anything. And things don't get much better when the group and the Astro Crew zoom off to Mars for an outer-space adventure. Can the group finally put their heads together in order to save themselves from a giant sandstorm, or will they be stranded on Mars forever?