Download MockFCAT2.0_MJSci3_Answer Key

Performance Matter
Answer Key (ABCD-FGHI)
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FCAT 2.0
SCIENCE
Search Tag- Science
MV- 80
TV-60
Grade 8 Sample Test
School District of Lee County
The intent of these sample test materials is to orient teachers and students to the types of questions on
FCAT 2.0 tests. By using these materials, students will become familiar with the types of items and
response formats that they will see on the actual test. The sample questions and answers are not intended
to demonstrate the length of the actual test, nor should student responses be used as an indicator of
student performance on the actual test. Additional information about test items can be found in the FCAT
2.0 Test Item Specifications at http://fcat.fldoe.org/fcat2/itemspecs.asp.
The FCAT 2.0 Science tests and sample questions and answers are based on the 2008 Next Generation
Sunshine State Standards.
Directions for Students for the Science Sample Questions:
TEACHER SAYS: We will be taking a Mock Science FCAT: You will mark all answers on the
Mock FCAT 2.0 Performance Matters bubble sheet. If you don't understand a question please
raise your hands and ask for clarification. During the assessment, you may use the space in this
booklet to do your work on the multiple-choice questions, but be sure to put your answers on the
Performance Matters bubble sheet. You will have 90 minutes (recommended) to complete the
Mock FCAT Science.
1) Ethan is observing chemical and physical properties of a substance. He heats a substance and
observes that the substance turns from a brown solid to a black powder. He refers to several
chemistry journals that claim this represents a chemical reaction. From his observation and
research, he concludes that the substance goes through a chemical change when heated. How
can Ethan best defend his conclusion?
A. by demonstrating that the substance will eventually melt if the temperature
continues to increase
B. by verifying that the substance is now made up of different molecules than
before it was heated
(SC.8.N.1.1)
C. by verifying that the substance is made up of only one type of element
D. by demonstrating that the substance is less dense after it is heated
2) Mr. Roberts drives his car away from his house at a constant speed. Which of the following
graphs best shows the relationship between the distance traveled and the time spent driving?
F.
H.
(SC.6.P.12.1)
G.
I.
3) Ice forms in the cracks of a basalt rock formation and breaks some rock into smaller pieces.
The diagram below shows part of the rock cycle.
At which point in the cycle shown above would the process of breaking down
rocks occur?
A. J
B. K
C. L
D. M
(SC.7.E.6.2)
4) An object moves through space with balanced forces acting on it. Which statement best
describes the speed and direction of the object as long as the forces acting on it remain
balanced?
F. The speed and direction of the object will both change.
G. The speed and direction of the object will remain constant. (SC.6.P.13.3)
H. The speed will change, but the direction will remain constant.
I. The speed will remain constant, but the direction will change.
5) A scientist performs an experiment and asks other scientists around the world to replicate it.
Why would other scientists most likely try to perform the same experiment?
A. to find out if weather of various regions of the world would affect the results
B. to see if the experiment would be less expensive in another part of the world
C. to confirm the results of the experiment conducted by the scientist (SC.6.N.1.2)
D. to verify that the hypothesis of the experiment is a scientific law
6) Food webs show feeding relationships among different types of organisms. Those organisms
each have a specific niche. Which of the following best describes a function of decomposers
in food webs?
F. to recycle nutrients into soil
(SC.7.L.17.1)
G. to convert solar energy into food
H. to provide food for secondary consumers
I. to compete with secondary consumers for oxygen
8
7) The interaction between the cryosphere and hydrosphere can have an impact on Earth’s
oceans. Which of the following is an example of an interaction between the cryosphere and
hydrosphere?
A. evaporation of water from oceans at the equator
B. release of fresh water into ocean water as icebergs melt (SC.6.E.7.4)
C. decomposition of organic matter at the bottom of oceans
D. release of large amounts of salt from icebergs into the ocean
8) Scientific knowledge may change as new evidence or information is discovered. Which of
the following would NOT be a result of new scientific research and information?
F. Binomial nomenclature is assigned to a recently identified plant species.
G. An endangered monkey species is put in a reserve for protection from extinction.
H. A newly discovered chemical element will be added to the periodic table of the
elements.
I. A nonnative plant species will begin to reproduce rapidly after being introduced into a
swamp ecosystem.
(SC.6.N.2.2)
9) Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr)
are in the same column in the periodic table. Why are these elements in the same column in
the periodic table?
A. They are the same size.
B. They react with each other.
C. They have similar properties.
(SC.8.P.8.6)
D. They have the same number of protons.
10) Students in Ms. Alvarez’s eighth grade science class are investigating how temperature, in
degrees Celsius (˚C), affects the solubility of a compound in 100 milliliters (mL) of water.
Ms. Alvarez provides the students with a graph that shows the solubility of a certain
compound, as shown below.
She then tells the students that she will demonstrate how many grams (g) of the compound
will dissolve in 100 mL of water at 40˚C. Based on the information in the graph, which of the
following is the best prediction of how many grams of the compound will dissolve at 40˚C?
F. 40 g
G. 65 g
H. 85 g
I. 100 g
(SC.8.N.1.1)
11) When a candle is lit, the wick burns, the wax melts, the candle changes shape, and the air
around the candle heats up. Which of the following is an example of a chemical change?
A. the wick burning
(SC.8.P.9.2)
B. the wax melting
C. the candle changing shape
D. the air around the candle heating up
12) Several factors can cause weather patterns in the atmosphere. The diagram below
shows how air movement near the equator can form thunderstorms.
Which process is the main source of this movement?
F. movement of ocean currents
G. decrease in relative humidity
H. heating by energy from the Sun (SC.6.E.7.5)
I. warming in the upper atmosphere
13) One physical property of a star is apparent magnitude. Which of the following is used in
determining the apparent magnitude of a star?
A. the constellation the star is in
B. the distance the star is from Earth
(SC.8.E.5.5)
C. the number of times the star rotates
D. the number of prominences the star makes
14) Deforestation occurs when large areas of trees are cut down. Which of the following impacts
on the environment would result from deforestation?
F. increased erosion
G. colder temperatures
H. excess ground moisture
I. greater oxygen production
(SC.7.E.6.6)
15) The graph below compares the density, in grams per cubic centimeter (g/cm3 ), of
four different substances.
Based on information from the graph, which of the following best compares the physical
properties of two of the substances?
A. Substance X has less mass than substance Y has.
B. Substance W has less volume than substance X has.
C. Substance Y would have less mass than substance Z would have if they had the
same volume.
(SC.8.P.8.4)
D. Substance Z would have less mass than substance W would have if they had the
same volume.
16) Keesha did an experiment to study the rate of photosynthesis in the water plant Elodea. She
placed a piece of Elodea in a beaker of water and set the beaker 10 centimeters (cm) from a
light source. Keesha counted the bubbles released from the plant every minute for five
minutes (min). She repeated the process two more times. First, she moved the light to 20 cm
from the beaker, and then she moved the light to 30 cm from the beaker. Keesha’s setup and
data are shown below.
What is the outcome variable (dependent variable) in this experiment?
F. the number of bubbles produced
(SC.7.N.1.4 )
G. the type of plant placed in the beaker
H. the distance of the light source from the plant
I. the amount of time the bubbles were counted
17) The following statements were taken from the procedures of four different investigations.
The statement from which investigation is an example of repetition?
A. Investigation 1
B. Investigation 2
C. Investigation 3
D. Investigation 4
(SC.7.N.1.2)
18) The surface of Mercury has many more craters than the surface of Earth has. Which of the
following statements best explains why Mercury has many more craters than Earth has?
F. Mercury rotates faster than Earth does.
G. Mercury has a smaller mass than Earth has.
H. Mercury is much closer to the Sun than Earth is.
I. Mercury has a thinner atmosphere than Earth has.
(SC.8.E.5.7)
19) The water level at the beach changes during the day. What causes the different water levels?
A. Earth’s revolution
B. the Moon’s rotation
C. Earth’s magnetic field
D. the Moon’s gravitational pull
(SC.8.E.5.9)
20) Two types of models that can be used to show details of the structures of cells are shown
below.
Which of the following describes a limitation of the drawing but NOT the clay model?
F. It does not represent the main parts of a cell.
G. It does not contain the correct number of nuclei.
H. It cannot represent a living cell, since a true cell is three-dimensional. (SC.7.N.3.2)
I. It cannot represent a living cell, since the cytoplasm should be in constant motion.
21) A timeline of some models of atoms throughout history is shown below. These models have
contributed to the formation of the atomic theory.
Which statement best summarizes the development of the atomic theory over time?
A. Advancements in atomic models proved the atomic theory was accurate.
B. The discovery of new evidence resulted in changes to the atomic theory. (SC.8.N.3.2)
C. With the discovery of every new element, the atomic theory was modified.
D. Changes in atomic models showed that the atomic theory was based on opinion.
22) The oldest rock formation identified on Earth is found on the shoreline of Hudson Bay in
Canada. This rock formed 4.28 billion years ago. What information does a scientist need to
more accurately determine the age of a rock?
F. the percentage of each mineral that makes up the rock
G. the thickness of younger rock layers that cover the rock
H. the amount of each radioactive element present in the rock
I. the amount of weathering present on the surface of the rock
(SC.7.E.6.3)
23) The climate of an area can be different from its weather. Which of the following statements
describes the climate of an area?
A. There should be heavy rains tomorrow morning.
B. The rains next week are expected to cause some flooding.
C. The average temperature from 1930–1996 was 23°C (74°F).
(SC.6.E.7.6)
D. The high temperature on September 4, 2009, was 32°C (89°F).
24) The points labeled on the chart below represent the approximate size of Earth, the Milky
Way, the Moon, and the Sun. The approximate size of the solar system is also shown.
Which point on the chart best represents the approximate size of the Sun?
F. W
G. X
H. Y
I. Z
( SC.8.E.5.3)
25) In order to maintain homeostasis, the systems of the human body work together to keep a
constant internal temperature. Which of the following statements describes how the human
body responds in a cold environment?
A. The nervous system moves the jaw bones and causes the chattering of teeth.
B. The nervous system signals the muscles of the muscular system to contract and warm
the body.
(SC.6.L.14.5)
C. The circulatory system delivers less carbon dioxide to the muscular system, resulting
in stiffening of the muscles.
D. The skeletal system produces more blood cells that circulate through the blood
vessels, increasing the warmth of the body.
26) Interactions between layers of Earth cause convection currents to move crustal plates. The
diagram below shows four layers of Earth.
In which layer of Earth are the convection currents that directly result in tectonic plate motion
found?
F. 1
G. 2
(SC.7.E.6.1)
H. 3
I. 4
27) Matthew has six cubes of different materials. Each cube has a mass of 10 grams (g).
Matthew sorts the cubes into two groups using one physical property.
Which physical property did Matthew most likely use to sort the cubes into two groups?
A. density
B. magnetism
C. melting point
D. electrical conductivity
(SC.8.P.8.4)
28) The arrows in the picture below show several ways heat is transferred from the Sun as it
strikes sand on the surface of a beach.
Which arrow shows convection?
F. 1
G. 2
H. 3
I. 4
(SC.6.E.7.1)
29) Sunlight is composed of energy that is visible to humans and energy that is not visible to
humans. Which statement describes how the visible energy from the Sun is different from the
nonvisible energy?
A. It travels at a different speed.
B. It travels a different distance.
C. It has different wavelengths.
D. It has different amplitudes.
(SC.7.P.10.1)
30) Luis rubbed a balloon on his hair and held the balloon next to the wall. He observed the
balloon stick to the wall. Which of the following is responsible for the balloon sticking to the
wall?
F. friction
G. gravity
H. electric force
I. magnetic force
(SC.6.P.13.1)
31) The diagram below demonstrates how a magnifying lens can make a penny appear larger.
What property of the magnifying lens is most responsible for allowing it to magnify the
penny?
A. It can reflect light.
B. It can refract light.
(SC.7.P.10.2)
C. It can increase the intensity of light.
D. It can increase the wavelength of light.
32) Emma constructed a simple motor. When connected correctly, the coil of copper wire spins.
Which of the following best describes the energy transformation that takes place between the
paper clips and the spinning coil?
F. Chemical energy transforms into electrical energy.
G. Mechanical energy transforms into electrical energy.
H. Electrical energy transforms into mechanical energy.
I. Mechanical energy transforms into chemical energy.
(SC.7.P.11.2)
33) Structures in the human body work together to perform specific functions. The diagram
below shows the organization of structures found in the human body.
A picture of which of the following structures belongs in the box above?
A. cell
B. organ
C. organelle
D. tissue
(SC.6.L.14.1)
34) Mrs. Aldaco added a copper (Cu) cube that is at room temperature and an aluminum (Al)
cube that she just removed from the freezer to a beaker of boiling water.
She left the cubes in the water for three hours. Which of the following describes a heat flow
that took place during those three hours?
F. from the aluminum cube to the beaker
G. from the copper cube to the boiling water
H. from the aluminum cube to the copper cube
I. from the boiling water to the aluminum cube
(SC.7.P.11.4)
35) The diagram below shows forces acting on a model airplane. Both its speed and height above
the ground are constant.
Which of the following conditions would cause the model airplane to descend toward the
ground?
A. The lift is equal to the drag.
B. The lift is less than the weight.
C. The thrust is equal to the weight.
D. The thrust is greater than the drag.
(SC.6.P.13.3)
36) The cell theory applies to all organisms, including the five shown below.
Which of the following statements describes how these organisms are an example of the
cell theory?
F. The organisms have cells that lack a nucleus.
G. The organisms are made of one or more cells. (SC.6.L.14.2)
H. The cells of the organisms undergo photosynthesis.
I. The cells of the organisms are identical to each other.
37) Mushrooms, bread molds, and yeasts are classified together in the fungi kingdom. Specific
characteristics are used to classify these organisms. Which of the following is a characteristic
used to classify these organisms as fungi?
A. They are parasites.
B. They are unicellular.
C. They are prokaryotes.
D. They are heterotrophs.
(SC.6.L.15.1)
38) A certain reptile species is a herbivore and exists only on an isolated island. Which of the
following would most likely result in the extinction of the reptile species over a period of
twenty thousand years?
F. The reptile species produces many offspring with many unique traits, and the
vegetation remains constant.
G. The reptile species produces few offspring with some unique traits, and the vegetation
remains constant.
H. The reptile species produces few offspring with no unique traits, and the vegetation
changes quickly.
(SC.7.L.15.3)
I. The reptile species produces many offspring with some unique traits, and the
vegetation changes slowly.
39) Plant cells are different from animal cells. The diagram below identifies four different
structures in a plant cell.
Compared to the structures in an animal cell, which of the following structures is found only
in a plant cell?
A. Mitochondrion
B. Cell Wall
C. Cytoplasm
D. Nucleus
(SC.6.L.14.4)
40) Mangrove trees are common to the Florida Everglades. The tree roots serve as a place for
freshwater oysters to attach when the tide is high, as shown in the picture below. The oysters
are protected from predators when attached to the roots underwater.
The oysters do not harm the trees nor do they provide any benefit to the trees. Which of
the following relationships is most similar to the relationship between the mangrove
trees and the oysters?
F. African ants living in acacia trees feed on leaf-eating insects found on the tree.
G. Spider crabs are camouflaged by the green-brown algae growing on their shells.
H. A whale is unaffected by the attached remora fish feeding on the whale’s leftover
food.
(SC.7.L.17.2)
I. Bees fly from one flowering plant to another gathering nectar and pollinating the
flowers.
41) The gene for curled ears (C) is dominant over the gene for straight ears (c). The picture
below shows a cat with curled ears (Cc) and a cat with straight ears (cc).
What percent of the offspring are expected to have curled ears as a result of a cross between
the cats shown?
A. 100
B. 75
C. 50
D. 25
(SC.7.L.16.2)
42) A diagram of the carbon cycle is shown below.
Each arrow represents a process in the cycle. Which of the following best describes the
process that occurs at arrow X?
F. Bacteria break down molecules in animals into carbon-based soil nutrients.
(SC.8.L.18.3)
G. Animals release oxygen that is used by bacteria to produce carbon dioxide.
H. Animals release carbon dioxide that is used by bacteria for growth and reproduction.
I. Bacteria combine carbon-based nutrients from plants and animals to produce glucose.
INSTRUCTIONS: Use the information and figures below to answer the next three questions.
The Indian River Lagoon
An estuary is a body of water in which fresh water draining from the land mixes with salt
water from the ocean. The result of this mixture is an environment with abundant plant and
animal life. The Indian River Lagoon is a 156-mile-long estuary on Florida’s east coast. It is a
diverse estuary, supporting thousands of species of plants and animals.
The food web and food pyramid shown below are examples of the relationships that exist
in the Indian River Lagoon ecosystem.
43. Which of the following has the largest population in the Indian River Lagoon ecosystem?
A. crab
B. egret
C. flounder
D. sea grass
(SC.7.L.17.3)
44. Which of the following statements most accurately describes the energy transfer between
the levels of the food pyramid in the Indian River Lagoon?
F. Energy stays in the phytoplankton at the lowest level.
G. Energy is released into the environment only from the egret.
H. Energy travels up from the phytoplankton to the clam worm. (SC.7.L.17.3)
I. Energy moves from the flounder to both the clam worm and egret.
45. In the Indian River Lagoon ecosystem, many organisms compete with one another for
food sources. Which organism in the food web competes with the egret for food?
A. clam worm
B. crab
C. flounder
D. heron
(SC.7.L.17.3)