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Grade 8 TCAP Test 2
Test Description: 8th grade TCAP practice
Instructions: Answer all questions to get your test result.
1) Which two items are BEST to use to determine the combined volume of 3 small rocks?
A
electric scale and ruler
B
graduated cylinder and water
C
hot plate and beaker
D
meter stick and eye dropper
2) Which properties MOST LIKELY indicate that a substance is a base?
A
turns blue litmus paper red and conducts an electric current
B
has a pH below 7 and corrodes a nail
C
releases hydrogen gas and reacts with metal
D
turns red litmus paper blue and conducts an electric current
3) Wire coils spinning between 2 magnets will produce
A
chemicals
B
steam
C
electricity
D
cold
4) Student records the speed of blue cars vs red cars. The avg speed of red cars was 70 mph, avg speed of blue cars was 68 mph. The student concludes that red paint makes cars go faster. Which statement identifies an error in the student's conclusion?
A
the observation shows information for several times of day
B
the conclusion was made based on two types of cars
C
the conclusion claims that there is a cause and effect without evidence
D
the observation was made on several highways
5) A student coils a copper wire around a bar magnet. Which action will cause the device to generate electricity?
A
the student insulates the copper wire with plastic
B
the student connects the copper wire to a light bulb
C
the student uses a horseshoe magnet instead of a bar magnet
D
the student moves the bar magnet through the copper wire coils
6) Which keeps Earth in its orbit?
A
the gravity of the moon
B
the revolution of the moon
C
the gravity of the sun
D
the rotation of Earth
7) A nuclear power plant has recently been built to generate electricity for a town located near several small lakes. Which is NOT a benefit of this nuclear power plant being built?
A
the cost of the electricity will decrease
B
the nuclear power plant will provide jobs
C
the loss of habitat for local wildlife
D
the heating of homes will be easier
8) A student wants to test how the concentration of phosphorous in a fertilizer affects plant growth. In designing this experiment the independent variable would MOST LIKELY be the
A
type of each plant used
B
type of phosphorous used
C
amount of phosphorous used per plant
D
height each plant grows after given fertilizer
9) A student designs as experiment to test the acidity of the water in several ponds near an industrial area. Which tool would BEST help a student obtain accurate data?
A
pH indicator
B
heat sensor
C
oxygen probe
D
metric ruler
10) A student observes a tree with small, needle-like leaves that stay green year round. Which conclusion can the student draw from the shape of the leaves?
A
the leaves of the tree have an illness that stunts their growth
B
the leaves of the tree do not perform photosynthesis
C
the leaves of the tree are intended to reduce water loss
D
the leaves of the tree are nonfunctional
11) Bob investigated how the mass of a plastic disk affected its motion. He pushed five disks, each with different mass, across a wooden floor, recorded the distance of each and repeated this 5 times. He concluded there was no relationship. Error?
A
the student performed too few trials
B
the student failed to control the amount of force applied
C
the student should have used disks that were the same mass
D
the student should have pushed the disks across different surfaces
12) Which statement BEST describes what the planet Saturn, a lizard, and a steaming kettle have in common?
A
all are multicellular organisms
B
all produce their own energy without help
C
all are made of atoms
D
all are at the same internal temperature
13) A student observes that a gas is formed when chemical Y is added to chemical Z in a lab. The student's observation of a new product being formed is the common outcome of all
A
physical changes
B
mass changes
C
phase changes
D
chemical changes
14) A combination of salt and sugar grains is BEST classified as a mixture because
A
no new chemical bonds are formed between the salt and sugar grains
B
both the salt and sugar grains are in the same state of matter
C
the grains taste different from one another
D
a new product is formed when the salt and sugar grains are combined
15) Which elements make up MOST of the earth's atmosphere?
A
nitrogen and helium
B
water vapor and helium
C
oxygen and water vapor
D
oxygen and nitrogen
16) A 5 gram sample of water occupies 5 mL of space in a beaker. Using the formula D=M/V (density=mass/volume), what is the density of the water sample?
A
5 gram/mL
B
1 gram/mL
C
25 grams/mL
D
10 grams/mL
17) Which statement BEST describes a physical change?
A
burning carbon releases the gas carbon dioxide
B
salt added to a cup of water makes salt water
C
an iron nail exposed to the atmosphere forms rust
D
a process separates water into hydrogen gas and oxygen gas
18) Which of these occurs during all chemical changes?
A
temperature increases
B
phase changes from solid to liquid
C
new elements are formed
D
new bonds form between atoms
19) Which statement describes a possible consequence if biodiversity were to decrease in the arctic due to the extinction of polar bears?
A
a decrease in the number of herbivores due to natural predators being gone
B
changes in the food web, leading to a loss of food resources for native people
C
an increase in the number of producers after a herbivore population boom
D
a disturbance in weather patterns, leading to a higher average water temperature.
*select an answer for all questions
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