Unit 1
the skin of a fruit or vegetable
peel
to reach a goal
achieve
a natural event that shakes the ground
earthquake
a set of bones from a single creature
skeleton
a place where bodies are put after death
tomb
to eat or drink
consume
electricity that moves in the brain
brain wave
a pattern made from small pieces of stone or glass
mosaic
the slow development of something
evolution
These are the 2 categories of sleep.
REM and non-REM sleep
very important or necessary
essential
a series of events that repeat
cycle
Petra is a city in this country.
Jordan
an early animal others have evolved from
ancestor
pesticide
a chemical used to kill harmful insects
____________ can help prevent heart disease and cancer.
Antioxidants
Teenagers are recommended to get ___________ hours of sleep per night.
7 to 9
The Nabateans were originally a group of ____________ people who traveled the deserts.
nomadic
Lucy is considered an ancestor of ____________.
humans
The ___________ people built a theater, columns, and mosaics in Petra.
Roman
Bananas, oranges, and grapefruits have this in common.
They are fruits that we usually peel before we eat them.
A full sleep cycle lasts around _______ minutes.
90
Petra is believed to be at least ________ years old.
2,000
Australopithecus lived around _____________ years ago in East Africa.
3.7 million