- Which sentence best states the importance of using control groups?
Your answer:
Control groups eliminate the need for large sample sizes, reducing the number of measurements needed.
Control groups make sure that factors remain the same.
Control groups provide a method of comparison for the experiment.
Control groups eliminate the need for statistical tests and simplify calculations.
- Which question is this apparatus most likely designed to answer?
Your answer:
Does turgor pressure affect the absorption of water?
Does absorbed light increase the environmental temperature?
Does gravity affect the direction of plant growth?
Does atmospheric pressure affect transpiration?
- The graph shows the relationship between environmental temperature and the pumping rate of an earthworm’s aortic arches. If this trend continues, what will most likely be the earthworm’s pumping rate at an environmental temperature of 12°C?
Your answer:
9 beats per minute
8 beats per minute
7 beats per minute
10 beat per minute
- The diagram shows two germinating seeds that have been placed in identical bottles kept in the dark. Bottle A was rotated 90 degrees each day for the next six days. Bottle B will not be rotated. What is a constant in this experiment?
Your answer:
water-soaked cotton
Bottle A that is being rotated.
Bottle B that is not being rotated.
90 degree rotation
- Bob decides to see if fertilizer affects the growth of plants. He has 10 plants total - 5 with fertilizer and 5 without fertilizer. Both plants receive 1/2 cup of water everyday and both receive the same amount of sunlight everyday. The plants without fertilizer are called the:
Your answer:
constant
control
dependent variable
independent variable
- The data on right supports the hypothesis that a planarian moves away from --
Your answer:
food
plants
rocks
light
- According to this information, the sex of developing sea turtle is determined by --
Your answer:
incubation temperature
sand composition
clutch size
available seawater
- What is the first step of a scientific investigation?
Your answer:
analyze the experimental data
formulate a hypothesis
state the problem
perform the experiment
- The results of one experiment carried out by a research team would be considered valid if:
Your answer:
the experiment was repeated and the same results were obtained each time
the experiment had no control setup
all the members of the research team came to the same conclusion
the experiment had more than one variable
- When a test tube of water containing Elodea (an aquatic plant) is placed near a bright light, the plant gives off gas. When the light is placed at different distances from the plant, the rate of bubbling is affected. The experimental variable demonstration is the:
Your answer:
type of aquatic plant in the test tube
concentration of gas in the water
distance of the plant from the light
amount of water in the test tube