direction of movement in space

Since there really is no "up" or "down" in space, what direction are astronauts being pulled toward when they are "unattached" in space?
(meaning if they were to not be holding on to anything or be in anything such as a space shuttle/station)

Space

Is there a bottom in space, and if there's, where does it end? Isn't there a bottom to everything?

Exploding Fizz

Why does, when mixed with baking soda, vinegar fizz? When mixed in an empty bottle, why does it fizz so much that it makes the bottle cap bust off and explode?

Why do they light?

Why do fireflies/lightning bugs light up or glow? What causes the reaction?

Solar help

How does solar panels reduce the carbon release in the air?

Science questions

If H2O =water & CO2 = oxygen has names, does photosynthesis have it's own scientific name?

Turtles? Winter?

How do turtles survive in the winter?

yyyyyy

y do tempatures havee 2 be equal?
like when somthings
1. cold it gets warm
2.warm or hot it gets cold

Growing and shrinking

Why do peole when they get older grow but when they are old they start to shrink?

The Moon

Douse the moon have any moons?

if so how many?

Sleeping insects

Do all insects sleep?