WorksheetsScience & Engineering Practices w. DCI (v.2)
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Based on trophic levels, which classification of organisms is one degree of order higher than herbivores? [S8.A.3.1.2]
a)
primary producers
b)
tertiary consumers
c)
primary consumers
d)
secondary consumers
2.
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?
[S8.A.1.1.4]
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
3.
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? [S8.A.2.1.1]
a)
The light absorption of a sample is independent of the concentration of the chemical compound.
b)
The concentration of the chemical compound in a sample remains steady as the light absorption increases.
c)
An increase in the concentration of the chemical compound in a sample is accompanied by an increase in the light absorption.
d)
A decrease in the light absorption of a sample is accompanied by an increase in the concentration of the chemical compound.
4.
Which statement best describes the mass of an apple? [S8.A.2.1.2]
a)
Mass is the amount of matter in the apple.
b)
Mass is the amount of space the apple occupies.
c)
Mass is the force applied to the apple by another object.
d)
Mass is the measure of the apple’s ability to resist changes in motion.
5.
A student used the smallest screen that could be used to completely sift the soil sample. Which conclusion best matches the student’s investigation?
[S8.A.2.1.5]
a)
Soil sample X has the most uniform particle size.
b)
Soil sample Y has the smallest average particle size.
c)
Soil samples Y and Z are most similar in size.
d)
Soil samples X and Y are most similar in size.
6.
Which unit should a student use when measuring the change in the amount of space taken up by a liquid as it is heated? [S8.A.2.2.2]
a)
g
b)
°C
c)
mL
d)
mm
7.
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?
[S8.A.3.2.2]
a)
It can be tested and changed more easily than a real airplane.
b)
It allows them to safely fly an airplane in dangerous conditions.
c)
It can be made to higher quality standards than a real airplane.
d)
It allows them to save money by never test-flying a full-size airplane.
8.
A student learns that pure water freezes at 0°C. The student wants to find out how much salt needs to be added to the water to lower the freezing temperature by two degrees. Which statement explains why this question can be answered through scientific inquiry?
[S8.A.1.1.2]
a)
The question likely has more than one answer.
b)
The question has already been answered by scientists.
c)
The question can be investigated through a group of experiments.
d)
The question can be answered through mathematical calculations.
9.
Scientists recently discovered that firing low-energy particles at potatoes keeps the potatoes from developing unwanted sprouts. They observed that these energy particles prevent cell division in the sprouts. This stops the potatoes from sprouting for up to 120 days. How will this development most likely affect the potato industry?
[S8.A.1.2.4]
a)
by allowing food engineers to improve the ways potatoes can be prepared
b)
by allowing potatoes to ripen over a longer period of time to improve flavor
c)
by allowing potatoes to be stored longer so they can be sold during winter months
d)
by allowing faster transportation to supermarkets so they never run out of potatoes
10.
A student predicts that a solution of ethanol (C2H5OH) and water will have a lower density at room temperature than that of pure water. Which tools would most help the student test this prediction? [S8.A.2.2.1]
a)
a meter stick and a balance
b)
a hot plate and a thermometer
c)
a thermometer and a stopwatch
d)
a balance and a graduated cylinder
11.
Which statement explains why populations in upper trophic levels tend to have less total mass than populations in lower trophic levels? [S8.A.3.1.2]
a)
Populations in upper trophic levels are more complex than populations in lower trophic levels.
b)
Populations in upper trophic levels have less available habitat than populations in lower trophic levels.
c)
Populations in upper trophic levels have less available energy than populations in lower trophic levels.
d)
Populations in upper trophic levels have more nutrient requirements than populations in lower trophic levels.
12.
Which statement best explains why the carbon cycle is classified as a closed-loop system? [S8.A.3.1.4]
a)
Carbon levels are monitored and maintained by plants in a system.
b)
The flow of carbon occurs only in nonliving components of a system.
c)
Earth’s atmosphere traps all carbon once it passes through living organisms in a system.
d)
A fixed amount of carbon flows between the living and nonliving components of a system.
13.
A mouse’s habitat is a grassland containing rocks, soil, and grass. The mouse lives in a burrow underground. Based on this information, which statement best describes how the mouse interacts with its environment? [S8.A.3.1.5]
a)
The mouse uses soil for food and shelter.
b)
The mouse gets energy from its predators.
c)
The mouse changes its environment to create food.
d)
The mouse gets energy and shelter from its environment.
14.
Which relationship would a scientist most likely model using calculations based on the law of universal gravitation? [S8.A.3.2.1]
a)
the motion of planets within the solar system
b)
the internal structure and position of the Moon
c)
factors that affect Earth’s atmosphere and climate
d)
natural events that change the shape of Earth’s surface
15.
A scientist measured dissolved oxygen (O2) levels in a pond over time. A graph showing the results of the measurements is shown. Which statement is the most accurate description of the events occurring in the pond during the time shown? [S8.A.3.3.2]
a)
Aquatic plants consume O2 in the pond through respiration at a constant level.
b)
Aquatic plants consume O2 in the pond through respiration mostly during the early morning.
c)
Aquatic plants provide additional O2 for the pond through photosynthesis from late afternoon to early morning.
d)
Aquatic plants provide additional O2 for the pond through photosynthesis from early morning until late afternoon.
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