Q 1/16
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Use the drawing below to answer the question. A student was unable to lift a rock using the lever setup shown. The student moved the location of the fulcrum closer to the rock until he was able to lift the rock. The student concluded that as the length of the effort arm increased, less effort force was needed to lift the rock. Which graph BEST represents the student's conclusion?
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16 questions

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Q1
Use the drawing below to answer the question. A student was unable to lift a rock using the lever setup shown. The student moved the location of the fulcrum closer to the rock until he was able to lift the rock. The student concluded that as the length of the effort arm increased, less effort force was needed to lift the rock. Which graph BEST represents the student's conclusion?
60s
S8.A.1.1.4
Q2
Use the graph below to answer the question. A scientific technique can be used to determine the presence and concentration of a chemical compound in a sample. A light source is directed at samples of known concentrations and the amount of light each absorbs is measured. Based on the graph, which statement best describes the relationship between concentration and light absorption?
The concentration of the chemical compound in a sample remains steady as the light absorption increases.
The light absorption of a sample is independent of the concentration of the chemical compound.
An increase in the concentration of the chemical compound in a sample is accompanied by an increase in the light absorption.
A decrease in the light absorption of a sample is accompanied by an increase in the concentration of the chemical compound.
60s
S8.A.2.1.1
Q3
Which statement BEST describes the mass of an apple?
Mass is the amount of matter in the apple.
Mass is the measure of the apple's ability to resist changes in motion.
Mass is the amount of space the apple occupies
Mass is the force applied to the apple by another object.
60s
S8.A.2.1.2
Q4
Use the drawings and table below to answer the question. A student used the smallest screen that could be used to completely sift the soil sample. Which conclusion BEST matches the student's investigation?
Soil samples X and Y are most similar in size.
Soil sample Y has the smallest average particle size.
Soil sample X has the most uniform particle size.
Soil samples Y and Z are most similar in size
60s
S8.A.2.1.5
Q5
60s
S8.A.2.2.2
Q6
An engineering team developed a new airplane body design that uses less fuel while flying. The team built a model to test the new design. How does using a model MOST LIKELY help the engineering team?
It allows them to safely fly an airplane in dangerous conditions.
It allows them to save money by never test-flying a full-size airplane.
It can be tested and changed more easily than a real airplane.
It can be made to higher quality standards than a real airplane.
60s
S8.A.3.2.2
Q7
Which inference about the process of making maple syrup from maple tree sap is BEST supported by these data?
A decrease in the boiling point of the liquid causes an increase in sugar concentration.
As the concentration of sugar in the liquid increases, the boiling point decreases.
As the concentration of sugar in the liquid increases, the boiling point increases.
A decrease in the boiling point of the liquid causes a decrease in sugar concentration.
60s
S8.A.1.1.3
Q8
60s
S8.A.1.3.1
Q9
Use the graph below to answer the question. A student applies identical forces to a block placed on three different surfaces. The student compares the acceleration of the block for each surface. Which inference about surface 1 is BEST supported by the results?
It has the steepest downward tilt.
It helps the block accelerate the greatest.
It produces the greatest friction with the block.
It increases the effect of the force of gravity
60s
S8.A.1.1.3
Q10
What is an unintended negative effect that long-term pesticide use can have on the targeted environment?
The pests that survive can develop resistance to the pesticides.
The number of animals that compete for resources with the pests can increase.
The amount of pesticide needed to eliminate the pests will be reduced over time
The amount of food the pests need to survive will be reduced.
60s
S8.A.1.2.2
Q11
During the Carboniferous period, which occurred about 300 million years ago, the oxygen content of Earth's atmosphere was much higher than it is today. Which organisms were MOST LIKELY responsible for the atmospheric conditions 300 million years ago?
fungi
decomposer bacteria
plants
land animals
60s
S8.A.1.3.3
Q12
Many bird species in Pennsylvania, such as the bluebird and golden-winged warbler, thrive in younger forests and open spaces. How would timber harvesting MOST LIKELY affect the sustainability of these bird species?
It would increase the number of favorable habitats.
It would remove debris that provides protection from predators
It would reduce the number of edible insect species
It would produce forests that contain mostly mature trees
60s
S8.A.1.3.4
Q13
A student designs an experiment to determine the spectrum of color produced by different light sources. Which variable should be held constant in the student's experiment?
the colors produced by each light source
the prism through which the light passes
the light source used
the brightness of the spectrum
60s
S8.A.2.1.3
Q14
Use the graph below to answer the question. The graph shows a relationship between the number of carbon atoms in different alcohol molecules and the boiling point of each alcohol molecule. Which statement BEST describes this relationship?
Increasing the boiling point causes the number of carbon atoms per molecule to decrease.
Increasing the number of carbon atoms per molecule causes the boiling point to increase.
Increasing the number of carbon atoms per molecule causes the boiling point to decrease.
Increasing the boiling point causes the number of carbon atoms per molecule to increase
60s
S8.A.2.1.4
Q15
Use the diagram below to answer the question. The diagram shows a type of hand pump used to bring water up from below the ground. Which flaw in the pump keeps it from functioning properly?
The connecting rod is not attached to the pump stand.
The handle is disconnected from the connecting rod.
The connecting rod is not located above the spout.
The handle gives too small of a mechanical advantage.
60s
S8.A.2.1.6

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