Science

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Science
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If a scientist wanted to find out how tall a
plant grows each day, the scientist would A.
give the plant a half-cup of water each day. B.
put the plant in a sunny place each day. C.
measure the plant with a ruler each day. D. put
the plant on a scale each day and weigh it.
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C.
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A student is investigating plant growth. The
student can change the amount of light, heat and
water and the richness of the soil. During the
investigations, the amounts of light, heat, and
water remain the same. Only the richness of the
soil changes. What is the independent variable in
this experiment? A. Light B. Water C. Heat D.
Soil
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D.
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Nine bean plants were grown in varying amounts of
light. What conclusion can be drawn from the
graph?
A. Bean plants grow best in low light. B. Bean
plants grow best in high light. C. Bean plants
grow best in moderate light. D. Bean plants grow
the same in all light.
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C.
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To find the depth of the ocean, some ships send a
sound wave to the ocean floor and record the time
it takes it to return to a detector. The kind of
wave used by this detector is the same as that
used by A. bats to detect objects in the dark. B.
snakes to detect warm-blooded prey such as
mice. C. police cars to detect the speed of
motorists. D. airports to detect the location of
airplanes in the sky.
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A.
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Which electrical appliance will use the most
energy when operating for five minutes?A.
ToasterB. Light BlubC. RadioD. Clothes Dryer
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A.
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To save the most energy, where should the home
have the most insulation? A. 1, ceilingB. 2,
floorC. 3, east wallD. 4, west wall
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A.
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Which pair best matches this pair of
words? TADPOLE --- FROG A. COCOON - MOTH B. WORM
- SNAKE C. BRANCH - TREE D. EGG - SEED
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A.
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The fish, dog, and bird are alike in many ways.
One way is that they all haveA. legs.B.
hair.C. lungs.D. backbones.
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D.
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What will probably happen if the plant is turned
around so that it faces the opposite direction?
A. It will stand up straight.B. Its leaves will
fall off.C. It will bend back toward the
sunlight.D. Its leaves will turn yellow.
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C.
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Decomposers are helpful to the food chain because
they A. provide nutrients for the soil.B. prey
on carnivores.C. use photosynthesis to make
food.D. are food for carnivores.
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A.
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What happens if the habitat of white-tailed deer
decreases in size? A. White-tailed deer will
have more food.B. The number of white-tailed
deer the habitat can support will decrease.C.
The number of white-tailed deer will increase.D.
Weaker white-tailed deer will survive longer.
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B.
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Which is an example of a chemical change? A. The
grinding of salt crystals to powderB. The
evaporating of water from a puddleC. The melting
of iceD. The burning of wood
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D.
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Removing which organism will destroy the food
web? A. InsectsB. SnakesC. HawksD. Plants
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D.
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Which word is under the wrong heading? A.
SteamB. PencilC. MilkD. Ice cube
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D.
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Each picture shows a battery, a bulb, and a
switch. Which bulb will light when the switch is
closed?
A. B.
C. D.
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B.
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An object is placed on a table. A magnet is
slowly moved toward it. The object moves away
from the magnet. The object is most likely
Learning A. another magnet.B. a piece of
glass.C. a copper coin.D. an iron nail.
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A.
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Pat found a wooden box in his grandparent's
garage. The top was nailed shut. He used a
crowbar to pry off the top. What type of simple
machine did Pat use? A. PulleyB. LeverC.
Inclined planeD. Wedge
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B.
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This rock was brought to school. The class found
fossils of water plants and shells in the rock.
What does this tell us about the rock?
A. The rock needs to be washed off.B. The rock
was once at the bottom of the sea.C. The rock is
heavier than most rocks.D. The rock is gray and
brown.
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B.
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Why is car exhaust seen more often on winter days
than on summer days? A. Cars use more gasoline
in the winter than in the summer.B. The cold air
condenses the warm exhaust air from the car.C.
Chemicals added to the gasoline during the winter
are easier to see.D. The sun is at a different
angle in the sky during the wintertime.
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B.
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A match will not burn on the moon because there
is A. not enough water.B. not enough oxygen.C.
not enough carbon dioxide.D. not enough gravity.
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B.
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Since stars give off their own light, they are
like the A. moon.B. Earth.C. planets.D. sun.
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D.
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Students in a laboratory have observed their
classmates switching the labels on the liquids
used in the lab. What is the most important
reason the students should report this to their
teacher? A. It will affect the experiment if the
wrong liquid is used.B. Using the wrong liquid
may cause someone to be injured.C. Rules that
are broken should be reported.D. Teachers are
the only people allowed to use the liquid.
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B.
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A hiker returning from a backpacking trip in the
Oregon Cascades tells you he has just seen the
abominable snowman or 'Big Foot.' As a scientist,
you would probably A. suggest that he is
lying.B. accept his report without question.C.
ask for more evidence.D. argue that 'Big Foot'
does not exist.
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C.
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Ann did an experiment in class. The results Ann
got were not what she predicted. What should she
do? A. Report her results exactly as she
observed them.B. Make up new results that prove
her prediction to be true.C. Make up a new
prediction to fit the results.D. Change
experiments.
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A.
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Which was invented first? A. TelegraphB.
TelephoneC. RadioD. Television
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A.
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Rosa's class took a field trip to the courthouse
where she noticed that small holes were starting
to form in the marble steps and statues. Which is
the most likely source of the damage? A. Acid
rainB. WindC. SunlightD. Worms
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A.
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If a city wants to improve the natural
environment of a park, what is the best thing to
do? A. Construct a flower garden with park
benches around it.B. Build a clay baseball
diamond with bleachers.C. Plant a variety of
trees and shrubs that are native to the area.D.
Build swings, slides, and seesaws for small
children.
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C.
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Which will tell the most about the mass of an
object? A. Touching itB. Lifting itC. Looking
at itD. Taking it apart
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B.
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Dana raised two kittens. After 8 months, Dana
noticed that the female cat was not as big as the
male cat. Because the male cat is bigger, Dana
thought that the male cat must eat more food than
the female cat. To test this, Dana should
measure A. the amount of food the female cat
eats.B. the amount of food the male cat eats.C.
the amount of food each cat eats.D. the total
amount of food both cats eat.
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C.
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A girl found the skull of an animal. She did not
know what the animal was, but she was sure that
it preyed on other animals for its food. Which
clue led to her conclusion? A. The eye sockets
faced sideways.B. The skull was much longer than
it was wide.C. There was a projecting ridge on
the front of the skull.D. Four of the teeth were
long and pointed.
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D.
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Which group is in the correct order for a food
chain? A. Grasshopper, grass, snake, toad,
hawkB. Grass, grasshopper, snake,toad, hawkC.
Grass, grasshopper, toad, snake, hawkD.
Grasshopper, toad, hawk, snake, grass
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C.
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John's bedroom windows shake when a jet flies
over his house. Which of these scientific facts
explains why this happens? A. Sound waves
transmit energy.B. Heat waves transmit
energy.C. Radar waves transmit energy.D. Radio
waves transmit energy.
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A.
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A force that slows down or stops the motion of a
bicycle is A. sound.B. heat.C. friction.D.
electricity.
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C.
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Clouds are formed when A. the air is too dry.B.
moist air rises and is cooled.C. the weather is
very hot.D. the wind blows too hard.
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B.
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If all the planets started out together on their
trips around the sun, which one would finish the
trip last? A. MercuryB. JupiterC. PlutoD.
Saturn
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C.
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The goal of a good scientist is to A. describe
and explain nature.B. make lots of money.C.
obey the boss.D. agree with what most scientists
say.
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A.
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Some cities have passed laws stating that leaves
cannot be burned. What is the most important
reason? A. To make more work for home ownersB.
To reduce the number of calls to the fire
departmentC. To prevent injuriesD. To reduce
air pollution
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D.
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Which of the following instruments do scientists
today depend on the most to solve problems? A.
TelephonesB. ComputersC. Fax machinesD. VCRs
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B.
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All of the following are needed for a fish to
live in an aquarium except A. food.B. sand.C.
water.D. oxygen.
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B.
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In a student's lunch bag, which item would
decompose the quickest? A. Fruit canB. Apple
coreC. Plastic bagD. Wooden spoon
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B.
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The same amount of water is poured into each of
the containers shown below, and they are left
uncovered in a warm room. After a day, which
container will have the least amount of water
left in it?
A. B. C.
D.
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C.
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Which of these is a renewable resource? A. Wood,
because trees grow againB. Coal, because more
can be made in about 100 yearsC. Petroleum,
because it can be refined into gasolineD. Gold,
because more can be made very easily
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A.
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Each year Earth moves once around A. Mars.B.
Venus.C. the sun.D. the moon.
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C.
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An ozone layer surrounds Earth and protects our
atmosphere. What happened to the ozone layer over
polar areas? A. Holes developed in the ozone.B.
The ozone layer got thicker.C. The ozone layer
changed colors.D. There has been no change in
the ozone layer
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A.
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The graph shows outdoor daily temperatures for
one week. What were the temperatures like during
this week? A. Mostly above freezingB. Mostly
below freezingC. Mostly below 20D. Mostly
below 0
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B.
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Which color of roofing material would be best to
help keep a house cool? A. WhiteB. BlackC.
GrayD. Green
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A.
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Why is it cooler to wear white-colored clothes in
the summer? A. White-colored clothes let in more
air.B. White-colored clothes prevent
sweating.C. White-colored clothes are not as
heavy as black-colored clothes.D. White-colored
clothes reflect more sunlight than black-colored
clothes
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D.
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John has a red apple in his lunch. Why does the
apple look red to him? A. Only red light waves
are absorbed by the apple.B. John's eye is only
able to sense red light waves.C. Only red light
waves are reflected by the apple.D. Red light
waves travel faster so they reach John's eye
first.
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C.
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At noon one day, Sam noticed the position of the
sun in the sky. At noon two weeks later, Sam
discovered that the sun had moved to a point
directly overhead. Why did the sun seem to change
its position? A. The seasons were changing from
summer to fall.B. The seasons were changing from
fall to winter.C. The seasons were changing from
winter to spring.D. The seasons were changing
from spring to summer.
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D.
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How does freezing water cause the weathering of
rocks? A. It holds them in place.B. It makes
them longer.C. It cracks them.D. It makes them
thicker
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C.
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Someone concerned about the environment would
prefer to buy A. drinks in glass bottles.B. eggs
in a plastic carton.C. boxes covered with wax
paper.D. books made of nonrecycled paper.
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A.