Quiz about MCA Science Prep

Question 1

Which of the following is an example of a decomposer at work in the food web?

Accepted Answer

A fungus growing on a log

Answer

A seagull catching a fish

Answer

A tree growing in a field

Answer

A grasshopper eating leaves

Question 2

Energy from the Sun is distributed around Earth by

Accepted Answer

radiation and convection

Answer

subduction and rift zones

Answer

solar flares

Answer

tectonic plates

Question 3

Which of these best describes the niche of a lion?

Accepted Answer

Predator

Answer

Parasite

Answer

Prey

Answer

Producer

Question 4

Because zinc can combine with other substances but cannot be changed into a simpler substance by an ordinary chemical process, zinc is classified as -

Accepted Answer

an element

Answer

an acid

Answer

a mixture

Answer

a compound

Question 5

According to this chart, which of these animals is a sea lion?

Accepted Answer

Option A is correct

Answer

B.

Answer

C.

Answer

D.

Question 6

Which of these populations is most likely to increase if the number of grasshoppers decreases?

Accepted Answer

Plant

Answer

Owl

Answer

Frog

Answer

Praying Mantis

Question 7

A plant's green color is due to the presence of which organelle?

Accepted Answer

Chloroplast

Answer

Nucleus

Answer

Vacuole

Answer

Mitochrondria

Question 8

In the food web shown, which of the following consumers eats only producers?

Accepted Answer

Mouse

Answer

Hawk

Answer

Owl

Answer

Fox

Question 9

During the process of evaporation, liquid water becomes -

Accepted Answer

molecules of water vapor

Answer

atoms of hydrogen and oxygen

Answer

separate atoms of water

Answer

tiny drops of water

Question 10

Which of the following materials is composed of only one kind of atom?

Accepted Answer

helium

Answer

air

Answer

sugar

Answer

water

Question 11

Mendel proposed that traits observed in pea plants resulted from a combination of "factors" inherited from each parent. His description of these "factors" can be considered the first scientific definition of the role of -

Accepted Answer

genes

Answer

meiosis

Answer

ribosomes

Answer

cell nuclei

Question 12

As a supplement to some diets, iron is taken in tablet form. The mass of iron in these tablets is often measured in -

Accepted Answer

milligrams

Answer

calories

Answer

centimeters

Answer

milliliters

Question 13

Plants release oxygen into the air as a result of photosynthesis. Which of these do plants need for photosynthesis?

Accepted Answer

carbon dioxide

Answer

methane

Answer

nitrogen

Answer

hydrogen

Question 14

The chart shows the results of an experiment to test the effects of different plant lights on plant seedling growth. Which group of plants showed the greatest gain in height?

Accepted Answer

Group 3

Answer

Group 1

Answer

Group 2

Answer

Group 4

Question 15

Which of the following does not use metric units to measure the density of a solution?

Accepted Answer

1.56 pounds/fluid ounce

Answer

1050 kilograms/cubic meter

Answer

10.5 grams/millimeter

Answer

1.05 grams/cubic centimeter

Question 16

Which of the following traits of a corn plant is least influenced by the environment?

Accepted Answer

Color of kernels

Answer

Height

Answer

Number of ears produced

Answer

Root structure

Question 17

The location on the track where the train has the greatest potential energy is -

Accepted Answer

1

Answer

2

Answer

3

Answer

4

Question 18

The Earth is warmed by solar energy. How is this energy transferred from the sun to the Earth?

Accepted Answer

radiation

Answer

conduction

Answer

convection

Answer

ultrasonic

Question 19

Which level of organization below is the most basic or primary level of organization?

Accepted Answer

Cell

Answer

Organ System

Answer

Organ

Answer

Tissue

Question 20

According to the chart, which set of conditions represents the process of photosynthesis?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 21

An example of kinetic energy continuously being changed to potential energy and back again might be -

Accepted Answer

a girl swinging on a swing

Answer

a train moving down a track

Answer

a plate sitting on the edge of a table

Answer

electric charges moving in a straight path

Question 22

Students measured the amount of an unknown substance that dissolved in water at different temperatures. What was the variable in this investigation?

Accepted Answer

water temperature

Answer

Amount of substance dissolved

Answer

unknown substance used

Answer

water volume

Question 23

Which of these is best classified as a mixture?

Accepted Answer

soil

Answer

water

Answer

carbon dioxide

Answer

iron

Question 24

Laundry in a clothes dryer often becomes charged with static electricity while drying. Which of these best explains why a clothes dryer often generates static electricity?

Accepted Answer

Electrons are transferred as clothes rub against each other in the dryer.

Answer

Heat from the dryer charges the air and produces lightning.

Answer

Clothes with metal pieces conduct electricity in the dryer.

Answer

Short circuits in the dryer charge the laundry.

Question 25

According to this chart, which planet will most likely have the highest temperatures?

Accepted Answer

Mercury

Answer

Venus

Answer

Earth

Answer

Mars

Question 26

Which diagram shows the refraction of light as it enters water from the air?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 27

Physical and chemical weathering processes are responsible for breaking down rocks. Which of these is an example of chemical weathering by water?

Accepted Answer

Limestone reacts with acid rain and dissolves.

Answer

Moss collects and grows on the surface of rocks.

Answer

Mineral crystals form as water evaporates from rocks.

Answer

Water freezes in rock cracks and causes the rock to split.

Question 28

Which of these processes in the water cycle causes dew to form in the morning?

Accepted Answer

Condensation

Answer

Transpiration

Answer

Evaporation

Answer

Precipitation

Question 29

Between points 4 and 5, energy is being used to change water from a -

Accepted Answer

liquid to a gas

Answer

solid to a gas

Answer

solid to a liquid

Answer

liquid to a solid

Question 30

Asexual reproduction involves only one parent. The offspring of this type of reproduction have -

Accepted Answer

DNA identical to the DNA of the parent

Answer

DNA that is different from the parent

Answer

DNA that is incomplete

Answer

One-half of the DNA of the parent

Question 31

A metal spoon was placed in a dish of ice cream and became cool. Which correctly describes the heat transfer process that resulted in the cooling of the spoon?

Accepted Answer

Conduction, because the spoon was in contact with the cold ice cream

Answer

Convection, because the spoon was in contact with the cold ice cream

Answer

Convection, because cold air currents affected the temperature of the spoon

Answer

Conduction, because cold air currents affected the temperature of the spoon

Question 32

Which facility relies on a nonrenewable source of energy?

Accepted Answer

A power station that burns coal

Answer

A wind farm that uses wind turbines

Answer

A solar farm that collects sunlight

Answer

A dam that uses the power of water

Question 33

Which statement correctly describes a difference between the mesosphere and the stratosphere?

Accepted Answer

The mesosphere contains fewer oxygen molecules than the stratosphere.

Answer

Air pressure is lower in the stratosphere than in the mesosphere.

Answer

The mesosphere has more active weather than the stratosphere.

Answer

Temperatures decrease with altitude only in the stratosphere.

Question 34

Which characteristic is common to the four outer planets in our solar system?

Accepted Answer

Gaseous composition

Answer

Low mass

Answer

Fast revolution

Answer

High density

Question 35

On a small island, scientists observed and graphed changes in wolf and moose populations. From 1965 to 1970, which data pattern did scientists observe?

Accepted Answer

A drop in wolf population and an increase in moose population

Answer

An increase in wolf population and a drop in moose population

Answer

A drop in wolf population and a drop in moose population

Answer

An increase in wolf population and an increase in moose population

Question 36

Students performed several trials using the laboratory setup shown. Students were also given this hypothesis: If friction increases, then the rolling distance of a marble will decrease. What should be changed to best test this hypothesis?

Accepted Answer

Roughness of the ramp surface

Answer

Height of the ramp

Answer

Height of the ramp and roughness of the ramp surface

Answer

Height and length of the ramp

Question 37

A student recorded the temperature of an aquarium each hour for 8 hours. Which of these will best display the data the student collected?

Accepted Answer

Line Graph

Answer

Picture graph

Answer

Circle Graph

Answer

Bar Graph

Question 38

Question 38.

Accepted Answer

Option C is correct

Answer

A.

Answer

B.

Answer

D.

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