Wider World 4

one of the large groups of stars that make up the universe

a bad effect on something

the planet that we live on

the vehicles that are on a road at a particular time

waste paper, cans etc that people have thrown away and left on the ground in a public place

a container for putting waste in

any group of planets that all move around the same star

a curved path followed by a planet or an object as it moves around another planet, star, moon, etc.

to add dirty or harmful substances to land, air, water, etc.

the act of using something in a careless or unnecessary way

things that you throw away because you no longer want or need them

one that may soon no longer exist because there are so few of them

a vehicle that is able to travel in space

machine that has been sent into space and goes around the Earth, Moon etc, used for radio, television, and other electronic communication

the round object that moves around the earth

to treat things that have already been used so that they can be used again

the force that causes something to fall to the ground or to be attracted to another planet