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Test Description: SOL Review - Experiments
Instructions: Answer all questions to get your test result.
1) Which question cannot be answered scientifically because the quantity cannot actually be measured?
A
How happy is a chimpanzee when it finds its favorite food?
B
How much food does a water buffalo consume in one day?
C
How heavy is a mature female elephant?
D
How fast can a tiger swallowtail butterfly fly?
2) Which of these would be measured to determine the density of the polar bear population in Canada?
A
The mass of the bears at the Arctic Circle
B
The number of bears per square kilometer
C
The total number of bears minus the juvenile bears
D
The total number of bears seen per day
3) A scientist designed an experiment to test the effect of temperature on bacterial growth. He grew three different cultures of the bacterium E. coli under three heat lamps at different temperatures. What was the independent variable in this experiment
A
Length of the experiment
B
Temperature
C
Reproduction rate
D
Number of bacteria
4) Data about the climate in an ecosystem were collected for 30 years. Which hypothesis about a population of eagles could be made based on the climate data collected?
A
An outbreak of disease in 1987 killed 82% of the eagle population.
B
Eagle chick survival is directly related to annual rainfall amounts.
C
Eagles remain with the same mate throughout their lifetime.
D
Mortality of eagles from pesticides after 1992 was less than 5%.
5) A student’s experiment showed that earthworms move away from light. This statement should be classified as —
A
an inference
B
a conclusion
C
a prediction
D
a hypothesis
6) In an experiment, the height of several plants was recorded daily in millimeters. Which tool would be the most accurate and appropriate for this measurement?
A
Graduated cylinder
B
Yardstick
C
Digital scale
D
Metric ruler
7) A biology class of 24 students decides to measure the height of each student and then calculate the average height for the class. Which of these is a possible source of error in this activity?
A
The accuracy of making and recording measurements
B
The total number of students in the class
C
The number of males and females in the class
D
The difference in the ages of the students in the class
8) A student wanted to study the effect of temperature on algae levels in a local stream. Which items are most useful for gathering data and most appropriate for communicating the results of her observations?
A
Research on the Internet and videotapes of water samples
B
pH strips and written observations of stream water
C
Microscopes and written descriptions of weather patterns
D
Test tubes, thermometers, and graphs of results
9) A student wanted to look at plant growth in five different soil samples. He planted the same type of seeds under identical conditions and charged their growth. What is the IV in this experiment?
A
Seeds
B
Light
C
Soil
D
Container
10) Orchids were studied to determine if the amount of humidity affected the flowering of these plants. Which of these was the independent variable in this study?
A
The percentage of humidity
B
The length of time required for flowering
C
The amount watered
D
The number of flowers on each plant
11) Which sentence best states the importance of using control groups?
A
Control groups eliminate the need for large sample sizes, reducing the number of measurements needed.
B
Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.
C
Control groups provide a method by which statistical variability can be reduced.
D
Control groups eliminate the need for statistical tests and simplify calculations.
*select an answer for all questions
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