Lesson 5.5 listening and vocabulary

The force which stops things on Earth floating away. Newton discovered it when an apple fell on his head

Children have these on special occasions. You blow them up and hang them for decoration.

A power which causes an object to move or change the way that it moves.

The part of a spacecraft in which people travel.

The layer of gases surrounding the Earth or other planets.

To break the sound ______, you have to go faster than the speed of sound.

This means the journey downwards from a higher point to a lower point, for example from space to the surface of the Earth.

People can jump out of planes wearing one because it makes them fall more slowly

All elements are either solid, liquid or a ______ .

The gas that we need to survive.

A very light gas.

A machine with moving parts that converts power into motion, for example in a car.