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Question 1
Coal is usually found underground, compressed in a layer between other types of rock.
Coal is produced by what rock-forming process?
A. crystallization from melted rock
B. formation of sediment from weathering
C. deposition and burial of dead plant matter
D. eruption of volcanic ash followed by settling in a layer
Question 2
What is the major process of surface rock formation on volcanoes?
A. Rock cools quickly from melted rock.
B. Rock is recrystallized by extreme pressure.
C. Rock solidifies slowly deep underground.
D. Rock is formed from deposited sediment.
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 3
Which cell structure carries out a function for a cell that is similar to the function that bark
carries out for a tree?
A. cell wall
B. nucleus
C. chloroplast
D. mitochondrion
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 4
The diagram below represents a cross section of a lagoon and some of its aquatic organisms.
A magnified view (400X magnification) of each organism is shown.
Lagoon
Structure Z serves the same function in each of the organisms.
What is the function of structure Z in the water lily, fish and paramecium cells?
A. to move the cells
B. to control cellular activities
C. to carry out photosynthesis
D. to allow nutrients to enter and exit the cells
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 5
The diagrams below show the digestive systems of an earthworm and a bird.
Earthworms and birds have strong muscular gizzards. The gizzard grinds food into small bits
before it passes on to the intestine. Mammals, in contrast, do not have gizzards.
Why do earthworms and birds need to have gizzards but mammals do not?
A. Earthworms and birds are not equipped to chew food.
B. Earthworms and birds eat food that is difficult to digest.
C. Earthworms and birds have intestines that work inefficiently.
D. Earthworms and birds do not have stomachs to mix moistened food.
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 6
Which is an example of a group of cells with a common structure and function?
A. stomach
B. muscle tissue
C. mitochondria
D. digestive system
Question 7
What is the relationship between tissues and organs?
A. Organs are made from one type of tissue.
B. Tissues are made from one type of organ.
C. Tissues are made from different types of organs.
D. Organs are made from different types of tissues.
Question 8
What is the role of the mitochondrion in cells?
A. It converts sunlight to energy.
B. It controls all functions of the cell.
C. It transports water throughout the cell.
D. It breaks down sugar to release energy.
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 9
Extinction
A paleontologist was studying the evidence of extinction of organisms in the fossil record.
Data were collected at several work sites. The paleontologist developed the drawing below of
eight layers at one work site. Other data used included the graph below that shows changes in
sea level from 490 million years ago to 60 million years ago. Asterisks on the graph indicate
times of mass extinction of marine organisms.
The paleontologist examined 10 sites in all. She made detailed drawings of these sites and
removed sample fossils. She labeled the sample fossils with the site number, location and
layer in which the fossil was found. The paleontologist returned to the lab and discovered
that some of the fossil samples were missing labels.
In your Answer Document, describe two different ways the lack of labels for these samples
will affect the interpretation of the data. (2 points)
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 10
The illustration below shows how a strawberry plant reproduces by asexual reproduction to
form a new plant.
In your Answer Document, describe how the new plant compares genetically with the parent
plant.
Describe one advantage that asexual reproduction might offer the strawberry plant. (2 points)
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Use the information below to answer questions 11-14.
Density Experiment
The two graduated cylinders pictured can hold the same amount of water and use the same
scale. A student measures the masses of two metal balls. One ball is made of aluminum and
the other ball is made of lead. The student adds 50 mL of water to each graduated cylinder
and then drops one metal ball into each graduated cylinder.
Question 11
Which tool did the student use to measure the mass of each metal ball?
A. ruler
B. timer
C. balance
D. graduated cylinder
Question 12
The student includes the sentence below in the write-up of this investigation.
The lead ball has a measured mass of 113 grams.
Which kind of scientific statement is this sentence?
A. inference
B. prediction
C. explanation
D. observation
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 13
The teacher asks the student to use the information she collected to compare the density of
the two metal balls. The mass of the lead ball is 113 grams and the mass of the aluminum ball
is 27 grams.
What can be concluded about the density of these metal balls based on this investigation?
A. The density of both metal balls is the same.
B. The density of both metal balls is less than the density of the water.
C. The density of the lead ball is less than the density of the aluminum ball.
D. The density of the lead ball is greater than the density of the aluminum ball.
Question 14
In repeating the investigation, the student accidentally drops and steps on the lead ball. This
action changes its shape from a sphere to an egg-shaped solid. The lead ball is placed back
into the graduated cylinder.
In your Answer Document, predict what effect, if any, this change has on the amount of
water displaced by the lead ball. Explain your prediction. (2 points)
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 15
A student studying rock densities needs to measure the volume of a small rock sample to the
nearest milliliter (mL). The student knows that the rock sample has a volume of at least 5
mL.
Which tool should the student use to get the most accurate measure of the volume of water
displaced by the rock?
A.
B.
C.
D.
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 16
Use the following information to answer question #.
The table below lists the densities of several materials.
Which material will float in water?
A. limestone
B. magnesium
C. sulfur
D. wax
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 17
Students do an investigation on the reaction of baking soda with vinegar. They create a data
table to record the mass (grams) and temperature (degrees Celsius) of the mixture every 5
seconds. Several pieces of data are missing from the table.
In your Answer Document, give one example of how the incomplete data make it difficult
for the students to draw conclusions about the changes that occur when baking soda reacts
with vinegar.
Explain how the incomplete data will affect the ability of other students to reproduce the
experiment. (2 points)
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Baking Soda and Vinegar Reaction
Students perform a chemistry experiment by mixing baking soda with vinegar. They mix 4
grams of baking soda with 50 grams of vinegar in a 6-gram plastic cup as shown below. The
cup is left uncovered. The students record the mass and temperature of the mixture every 5
seconds. They continue these observations until 10 seconds after they see the mixture stop
bubbling. Their data are shown in the table below.
Question 18
The data show that the mass of the cup and its contents decreases while the mixture is
bubbling.
In your Answer Document, explain why the mass of the cup and its contents at 25 seconds is
less than the initial total mass of the cup, baking soda and vinegar.
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 19
Most electric power is generated by burning fossil fuels. A family living in central Ohio uses
electric appliances for cooking and air conditioning. They use fuel oil for heating.
What change could this family make to conserve fossil fuels?
A. convert to natural gas as a fuel for cooking
B. switch to the use of less expensive coal for heat
C. lower the temperature setting on the air conditioner
D. install solar roof panels to generate additional electricity
Question 20
Why is coal considered to be a nonrenewable energy source?
A. Sunlight is the original source of energy for coal.
B. The burning of coal could cause environmental pollution.
C. Once coal is mined, it can take millions of years to be replaced.
D. Coal is abundant, but it is very expensive to mine from underground.
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 21
A class is studying electricity and how it is produced in Ohio. The students make the table
below to share information about energy sources.
Which statement identifies a nonrenewable energy source from the table and correctly
explains why this source is considered nonrenewable?
A. Biomass is nonrenewable because once the waste material is used up, there is no way
to produce additional waste material.
B. Petroleum is nonrenewable because there is a fixed amount of oil underground and
new petroleum takes millions of years to form.
C. Solar energy is nonrenewable because there is only one sun in the solar system and
there is no replacement when the sun is used up.
D. Wind energy is nonrenewable because the air pressure difference required to produce
wind is not available at all times at all locations.
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 22
The energy of blowing wind can be harnessed to create electricity.
Why is wind considered a renewable energy source?
A. Wind does not cause destruction of the environment.
B. Wind turns the blades of a windmill that creates electricity.
C. Wind provides only a very small amount of electricity to the United States.
D. Wind comes from atmospheric conditions that are available indefinitely.
Question 23
Why are fossil fuels called nonrenewable resources?
A. They make waste products.
B. They are buried far underground.
C. They take a very long time to produce.
D. They are more expensive than nuclear fuels.
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 24
Use the charts and information below to answer question #.
The two charts below show percentages of production methods for generating electricity in
Ohio and in the entire United States in 2002.
The charts show some differences in the amount of electricity produced by different methods
in the United States and in Ohio. Various constraints, such as geographic, social or economic
factors, influence the method used for electricity production in a region.
In your Answer Document, choose one method of electricity production used in Ohio.
Give two reasons or factors that support using this method in Ohio, and give two reasons or
factors that can be used to argue against using this method in Ohio. (4 points)
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009
Question 25
Highways allow people to travel between towns and cities. These highways also divide
ecosystems into smaller pieces. Animals can become separated from lakes they use for
breeding. For example, tiger salamanders travel long distances to breed at lakes.
How could highway systems affect animals such as the tiger salamander?
A. Tiger salamander habitats may be exposed to less pollution.
B. Tiger salamanders may be cut off from important resources.
C. Tiger salamanders could improve their ability to remember roads.
D. Tiger salamander habitats within ecosystems could become larger.
Question 26
The instructions for an experiment direct the students to put a liquid into a beaker and use a
hot plate to heat the liquid to 50 C.
o
In your Answer Document, describe two safety precautions the students need to take while
heating the liquid. (2 points)
6th Grade OAT items
Created by Brice Harris TCESC, Dec 2009