I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What jumps when it walks and sits when it stands?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

If you say my name, I will no longer exist. What am I?

Give it food and it will live; give it water and it will die.

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

What breaks yet never falls, and what falls yet never breaks?