fuel such as coal or oil that was formed over millions of years from parts of dead animals or plants
fossil fuels
a person who has been trained in medical science, whose job is to treat people who are ill or injured
doctor
to make something fall down by cutting it at the base
cut down
very tired
exhausted
a group of people who play a particular game or sport against another group of people
team
a period of unusually hot weather
heatwave
something that is done to cure an illness or injury, or to make somebody look and feel good
treatment
to stop existing
die out
feeling pleased and satisfied about something that you own or have done, or are connected with
proud
a flat piece of metal, usually like a coin in shape, that is given to the winner of a competition
medal
animals at risk of no longer existing
endangered species
a change in your body or mind that shows that you are not healthy
symptom
to consume all of something
use up
feeling or showing thanks because somebody has done something kind for you or has done as you asked
grateful
the official who controls the game in some sports
referee
a thin part of the Earth's atmosphere that absorbs almost all of the sun's harmful ultraviolet light
ozone layer
to stop somebody from doing something; to stop something from happening
prevent
to defend verbally or physically
stand up for
feeling happy because something unpleasant has stopped or has not happened
relieved
a person who competes in sports
athlete
a change in the properties of ocean water that can be harmful for plants and animals
ocean acidification
unwanted feelings or problems caused by medicine
side effects
to be faced with a problem or opposition
come up against
feeling or showing a lot of excitement and interest about somebody/something
enthusiastic
a person who takes part in a sporting event
competitor