Level 8 Level 10
Level 9

The Natural World

25 words 0 ignored

Ready to learn       Ready to review

Ignore words

Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.

All None

a hole or tunnel in the ground made by animals such as rabbits for them to live in
a room in a house where people go to relax, watch television, etc. | the hidden home of some types of wild animals | a place where people meet in secret, especially for some illegal or immoral activity
the lion's den
a difficult situation in which you have to face a person or people who are unfriendly or aggressive toward you
ecological balance
a term describing how ecosystems are organized in a state of stability where species coexist with other species and with their environment.
all the animals living in an area or in a particular period of history
the plants of a particular area, type of environment, or period of time
the place where a particular type of animal or plant is normally found
a chemical used for killing pests, especially insects
a chemical that is poisonous to plants, used to kill plants that are growing where they are not wanted
an animal, a bird, etc. that is hunted, killed, and eaten by another
an indirect and usually bad result of an action or event, which may happen some time afterward
plants in general, especially the plants that are found in a particular area or environment
wild animals or birds that destroy plants or food, or attack farm animals and birds
(of land or a climate) having little or no rain; very dry | with nothing new or interesting in it
a sudden event that causes many people to suffer | an event that causes one person or a group of people personal suffering, or that makes difficulties
involving or causing sudden great damage or suffering | extremely unfortunate or unsuccessful
very bad, harmful, or unsuccessful
to make a wild animal used to living with or working for humans
not affected by something; able to resist something | opposing something and trying to stop it from happening
(of land or climate) dry; with little rain
weak and easily hurt physically or emotionally
to change something in order to make it suitable for a new use or situation | to change your behavior in order to deal more successfully with a new situation
to destroy or get rid of something completely, especially something bad
(of animals) to spend the winter in a state like deep sleep
to allow someone to do something that you do not agree with or like | to accept someone or something that is annoying, unpleasant, etc. without complaining | to be able to be affected by a drug, difficult conditions, etc. without being harmed