Science news.

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DIRECTIONS: Read the Science News section on pages 4 to 7.
Then, test your knowledge by filling in the letter of the correct
answer below.

1. Scientists found that yawning
in chimps, like in humans,

(A) suggests boredom.
(B) is contagious.
(C) only happens at night.
(D) is addictive.

2. Humans most likely yawn at
the same time because

(A) they are usually bored at the
same time.
(B) people enjoy copying each
other.
(c) people have social instincts to
do things as a group.
(D) yawning together is more
effective than yawning alone.

3. The Xavix interactive system
uses optical sensors to
measure the -- and -- of the
player's swing.

(A) angle, velocity
(B) mass, speed
(C) force, mass
(D) distance, height

4. The pterosaur was a type of

(A) fossilized animal.
(B) flying reptile.
(C) bird.
(D) dinosaur.

5. The discovery of a fossilized
pterosaur in China revealed that
the animal

(A) laid eggs.
(B) lived in water.
(C) lived inside volcanoes.
(D) was a marsupial.

6. Which food listed below
contains the most antioxidants?

(A) raspberry
(B) strawberry
(C) artichoke
(D) blueberry

7. Which of the following
statements about antioxidants
is false? They

(A) help prevent cancer.
(B) are chemical compounds.
(C) are found in fruits.
(D) are free radicals.

8. The small earthquakes that
preceded the recent Mount
Saint Helens
eruptions signified

(A) underground
magma was pushing
its way up toward
Earth's surface.
(B) magma was reaching boiling
point.
(C) a chunk of the volcano
collapsed.
(D) the volcano was no longer
active.

9. An active stage defines

(A) the period of time when lava is
actively spewing from a
volcano.
(B) the moment when earthquakes
begin shuddering beneath a
volcano until the moment the
volcano stops erupting.
(C) a long period of time during
which a volcano sporadically
erupts.
(D) the period of time when a
volcano is erupting ash.

10. Mount Saint Helens lies in a
chain of volcanoes called the

(A) Rocky Mountains.
(B) Pacific Rim.
(C) Washington Heights.
(D) Cascade Range.

1.b 2. c 3. a 4. b 5. a 6. d 7. d 8. a 9. c 10. d