Science riddles

Front

Something in your house you go in and out of

Options: window, door, basement

Back

door

Front

I travel around the world, but only stay in one corner.

Back

a stamp

Front

Which room has got no door?

Back

mushroom

Front

How many months have 28 days?

Back

All months

Front

How many blocks in the tower? Options: 5, 7, 9

Back

9

Front

The more you take the more you leave behind. What am I?

Back

footsteps

Front

What has a head, a tail, is brown, and has no legs?

Back

Coin

Front

What comes once in a minute, twice in a moment, but never in a thousand years?

Back

the letter 'm'

Front

David's father has three sons: Snap, Crackle and _____?

Back

David

Front

What room do ghosts avoid?

Back

the living room