Speed is how fast things move. Some things move fast, and some things move slowly.

Yes, it can. When you push a door with a small force, it will open slowly. When you push the door with a big force, it will open quickly.

It's easier to push my friend on a swing. My friend is lighter than the teacher, and we need to use a small force to move light objects.

Natural gas, oil and coal are the examples of fossil fuels.

I believe, we should use nonrenewable energy. First of all, because it's clean. Wind power doesn't cause any pollution. We will also never run out of wind.

A force is what makes things move. A push is a force. A pull is a force, too.

Rural area is the area outside cities. There're many farms and fields.

There're many reasons why people move to new places. Mostly, people move to find a better job, to have good services and get new experiences.

I use electricity everyday, and I use it for many things - from charging my phone to keeping groceries cool in the fridge.

(your answer)

Some families prefer to live in suburbs, because they are safe and quiet. There's a lot of space for hospitals, schools and zoos.

Wind, sun and water are renewable sources of energy. Natural gas, oil and coal are nonrenewable.

Urban area is a city area. There're many banks, cafes, restaurants and tall buildings.