existing naturally in an environment
The travelers found the natives to be very friendly and helpful.
population
the total number of people who live in a particular area, such as a city or country
My home town has a population of about 60,000 people.
ethnic
relating to groups of people sharing culture, religion, race, etc.
The Maori people are a cultural and ethnic minority in New Zealand.
minority
a part that is less than half of the whole; a small part
The Maori people are a cultural and ethnic minority in New Zealand.
unique
the only one
She always stands out in class; she has a very unique voice.
particular
distinguished or different from others or from the ordinary
The dress shop didn't have the particular dress she was looking for.
detail
a small piece of information or fact
The tattoos have lots of details, shapes, and patterns.
impressive
excellent
The ice skating show was impressive.
fascinating
very interesting, incredible
The view of Rome is absolutely fascinating.
born
brought into being by birth
My sister’s baby was born last night.
expect
to believe that something is probably going to happen
I expected Joe to win because he was the champion last year!
pass
to give something to someone else
People expect its population to pass China’s soon.
adult
a person who is legally responsible for himself or herself
You become an adult when you are 18 years old.
shrink
make smaller
Be careful not to wash your sweater in hot water because it could shrink.
crisis
a dangerous situation that needs serious attention
The airport workers’ strike led to a crisis at the airport.
support
to like it and help it be successful
These days, many mothers support the family as much as the father.
climate
the general weather conditions and patterns of a particular region
The climate of Australia is generally dry.
century
a period of 100 years
We live in the twenty-first century.
trail
a path through the forest or a field trails were left behind by the moving rocks.
sheet
a thin flat piece of paper
On the desert floor, think sheets of ice form.
solve
to find the correct answer to a problem or mystery
Finally, a scientist solved the mystery.
scrape
to remove something from a surface by roughly brushing it off with another object
The man scraped the paint off the wall.
skate
to slide or move on a surface while wearing ice or roller skates
He learned how to skate when he was very young.
overnight
during or for the length of the night
She became famous overnight. Now she is a star!
solar system
the Sun, Earth, eight other planets, moons, comets that move around the sun
The solar system that we live in is called the Milky Way.
sustain
to keep up
There’s no other place, besides Earth, that can naturally sustain human life.
condition
the state of something
We also need other conditions, like appropriate temperatures.
suitable
appropriate
He wants a suitable location for a new factory.
atmosphere
a cover of cloud, made by gases, that surrounds a planet
The Earth is surrounded by a layer of gases called the atmosphere.
essential
being the most basic, primary, or significant quality of a situation or subject
Food, water, and air are essential to the well-being of a human.
appropriate
suitable; well-matching, fitting
Taking appropriate actions during an earthquake can reduce injuries and save lives.
surface
the outside limit or top layer of something
Scientists also believe Europa’s surface has water.
device
a tool or implement
You can use a device called an e-book reader to read e-books.
carry
to have or hold something on or near your body
Third, you can carry e-books easily.
text
the written part of a book or other work
I am sending a text message to my girlfriend.
brightness
The quality of being bright.
You can also change the brightness of the screen.
screen
to test or examine someone or something to discover if there is anything wrong with them
You look at the screen of the computer.
increase
to grow in size or amount
E-book sales in the US are increasing every year.
expert
someone with special skill in a certain area and knows a lot about that area
Some experts say that e-books will sell more than paper books.
predict
to state that something will happen in the future
They predict this will happen in the US by 2018.
survey
poll
We took a survey to see how kids reacted to the new standard.
choice
the act of choosing or selecting
There were many different choices we could make.
puzzling
hard to understand; confusing
This is a very puzzling question.
result
a consequence of an action
I gathered the results of my survey.
bar graph
Synonym of bar chart
I gathered the results of my survey. Then I drew a bar graph.
pie chart
A pictorial graph in the shape of a circle, with segments representing related proportions
A pie chart makes a circle when all the parts are put together.
series
a group of similar things or events
The Harry Potter series took first place.
tie
to end a game, contest or vote with the same number of points as another person or group
The two teams tied each other during the contest.
benefit
a good thing
There are many benefits to exercise.
sick
being in a condition of poor health or disease
You need a strong body so you don't get sick easily.
heart
the muscle that pumps blood through a body
Your heart pumps blood around your body.
pump
to extract liquid from the ground by using a specific device
Your heart pumps blood around your body.
blood
the red liquid that flows in the bodies of living humans and animals without which we cannot live
I cut my finger and got blood on my shirt.
brain
the organ in your head that lets you think
The brain is responsible for all of the body’s activity.
memory
the ability to remember things that have happened in the past
The more blood that goes through your brain, the better your memory gets.
stress
a strong feeling of worry caused by problems in life, work, etc.
Exercise is a great way to reduce stress.
habit
a repeated behavior
Good habits are important for living a healthy life.
list
a series of items, written, stated , or memorized in order
My mom makes a list of groceries to buy.
occasionally
in an irregular manner
Eat junk food, like chips and cookies, only occasionally.
polite
showing respect and consideration for the needs or feelings of other people
Always be polite and kind.
floss
to clean between the teeth using a special string
I brush and floss my teeth every night.
dentist
a person whose job is to take care of people's teeth
I visit the dentist regularly.
sneeze
to quickly force air out through the nose and mouth
Florence always sneezes when a cat is nearby.
elbow
the area of the arm that bends where the upper and lower halves are joined
The joints in our elbows and knees only move one way.
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