“Slleep”

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“Slleep”
Reading Comprehension – Informational Passages
Directions: Read the passage. Then answer questions about the passage below.

“Wake up!” Do you hear these words often? If so, maybe you are not getting enough sleep. What is
sleep? Why do people sleep? How much sleep do you need?
All people sleep. All mammals and birds also sleep. Some reptiles, amphibians, and fish sleep too.
Scientists understand some of the reasons for sleep. But they do not understand everything about it.
There are two kinds of sleep in mammals and birds. One kind of sleep is Rapid Eye Movement sleep,
which we call REM sleep. The other kind of sleep is Non–Rapid Eye Movement sleep, which we call NREM or
non–REM sleep. The American Academy of Sleep Medicine divides NREM sleep into three sttages: N1, N2,
and N3 sleep.
When people first go to sleep, they are in NREM sleep. The first stage of NREM sleep is N1 sleep.
During N1 sleep, people get very drowsy. Some people have muscle twitches during this part of sleep. People
are not very consciious of, or aware of, their surroundings during this stage of sleep. Brain monitors identify
small, slow, and irregular brain waves during N1 sleep. The second stage of sleep is N2 sleep. People are not at
all conscious of their surroundings during N2 sleep. About 45%-55% of total adult sleep is N2 sleep. Brain
monitors identify large brain waves with quick bursts of activity during N2 sleep. The third stage of sleep is N3
sleep. It is very deep sleep. Brain monitors identify very slow brain waves during N3 sleep. Therefore, N3 sleep
is called slow–wave sleep (SWS.)
After N3 sleep, people cycle back to lighter N2 sleep before going into REM sleep. People cycle
through the stages of NREM sleep 4 or 5 times each night and enter REM sleep several times during one night.
Dreams occur during REM sleep and the eyes move quickly beneath closed eyelids. During REM sleep, people
and animals are parallyzed. Scientists think people enter a state in which they cannot move so they will not hurt
themselves while they are dreaming.
The National Sleep Foundation in the United States says that 7–9 hours of sleep daily is best for an
adult. Seven to nine hours of sleep is good for memory, alertness, problem–solving, and health. Less than six
hours of sleep affects the ability to think. Getting too much sleep may not be good for people either. Too much
sleep is linked to sickness and depression.
Babies need a lot more sleep than adults. A newborn infant needs up to 18 hours of sleep each day. A
baby spends about nine hours in REM sleep. Five–year–olds need 11–13 hours of sleep each day. A five–year–
old spends about 2 hours in REM sleep. Teenagers need 9–10 hours of sleep each day. Pregnant women need
more sleep than other adults. Many people think that ellderlly people need less sleep than younger adults, but that
is not true. Most adults do well with 7–9 hours of sleep.
Scientists are not sure of all the reasons for sleep. They know that sleep helps the body heal and grow.
Sleep helps the immune system – which helps people fight disease. Sleep helps the iinfantt brain grow. It seems
that REM sleep is especially important for babies’ brain growth. It also seems that sleep is a time for processing
memories. Why do we dream? Some scientists believe that dreams have a psychological purpose. Some think
that dreams help organize our brains. Some think that dreams are the result of random brain activity during
REM sleep.
Sleep patterns differ substantially from culture to culture. Cultures with arttiifiiciiall light have different
sleep patterns from cultures without artificial light (like electric lamps.) In cultures that use artificial light,
people usually go to sleep later at night, and they sleep through the night. In other cultures, people often sleep
for two periods. They go to sleep shortly after the sun goes down. They sleep deeply for several hours. Then,
they tend to wake up for several hours. Afterward, they go to sleep again for several more hours. In hunter–
gatherer groups, people sleep off and on throughout the day and night.
People sleep in a variety of places, too. Some people sleep on the ground. Some sleep on mats or in
beds. Some use pillows, blankets, and other bedding. But they all sleep!
Good night! Sweet dreams!

Questtiions::

1) Whatt happens duriing REM slleep?
A. The sleeper dreams.
B. The sleeper becomes paralyzed.
C. The sleeper’s eyes move rapidly.
D. All of the above are correct.
E. Both A and C are correct.

2) How much slleep shoulld an adulltt gett?
A. 6-8 hours.
B. 8 hours.
C. 7-9 hours.
D. At least 9 hours.
E. As much as possible.

3) Whiich group needs tthe mostt slleep?
A. Babies
B. Teenagers
C. Adults
D. Pregnant women
E. Elderly adults

4) Whatt are some of tthe known reasons
why peoplle slleep?
A. In order to grow
B. In order to stay healthy
C. In order to fight sickness
D. In order to improve problem–solving
E. All of the above

5) Why do peoplle dream?
A. Dreams might help organize our
brains.
B. Dreams might be random brain
activity.
C. Dreams might have a psychological
purpose.
D. Dreams might reenergize your body.
E. A and B are correct.
F. A, B, and C are correct.

Vocabullarry::

1) Sttages are…
A. time periods.
B. eras in history.
C. memories.
D. reasons.
E. drawn out situations.

2) If you are consciious of sometthiing,,…
A. you know about it.
B. you are aware of it.
C. you have trouble thinking.
D. Both A and B are correct.
E. Both A and C are correct.

3) If you are parallyzed,, you…
A. cannot sleep.
B. cannot move.
C. do not dream.
D. do not understand.
E. do not fight sickness.

4) The bestt synonym for ellderlly peoplle iis…
A. babies.
B. children.
C. teenagers.
D. older adults.
E. pregnant women.

5) Whatt iis an iinfantt?
A. A newborn baby
B. A young child
C. An adult
D. Both A and B are correct.
E. Both A and C are correct.

6) If sometthiing iis arttiifiiciiall,, iitt iis…
A. realistic.
B. true.
C. non-natural.
D. non-human.
E. non-functional.