Earth and Space

The sun is a

The sun is the

We live in the __________ _________ galaxy

The Milky Way galaxy is a _____ or disc shaped galaxy

Which is NOT one of the three factors that makes Earth habitable?

Proximity to the sun gives us all of the following except :

This gas keeps heat on the surface of the Earth and humans exhale it

Gas that humans need to stay alive

layer of gases that surround the Earth

Water makes up ________ percent of the planet

The space having no atmosphere or sound means it is a

Microgravity means to

Space has various G forces that cause muscle loss, heart rhythm dysfunction, heart and vision impairment and balance problems.

astronauts in space must find ways to exercise to slow the loss of bone and muscle

reusable spacecraft that can carry a crew and equipment into space, turn to earth and be reused for the same purpose.

A space suit protects from

How does the space suit protect from drifting off into space?

The food has to be

Why do astronauts use exercise equipment?