WorksheetsQuizizz #4 (2021) Living Enviornment
Total questions: 21
Worksheet time: 1hrs 3mins
How much water should be added to the graduated cylinder shown below to increase the volume to 15 milliliters?
3 mL
4 mL
10 mL
11 mL
If a control group is not included in an experiment, it would be difficult to
formulate a hypothesis for the experiment
make observations about the experimental group
record data in a data table
draw a valid conclusion
An experiment was set up to determine the effect of nitrates, a pollutant, on the number of chloroplasts present in euglena. Five tanks were set up, each with euglena and a different concentration of nitrate solution: 0%, 0.5%, 1.0%, 1.5%, and 2.0%.
The tanks were placed in a sunny location where each tank received the same amount of light.
Which statement is a possible hypothesis for this experiment that could be supported by the results of this experiment?
If the average number of chloroplasts in euglena decreases, will less nitrate be needed in each tank?
If the nitrate concentration is increased, then the euglena will have a lower average number of chloroplasts.
If the number of euglena in a tank increases, will more nitrates be produced?
If the nitrate concentration is decreased, then more light will reduce the average number of chloroplasts in euglena.
An experiment was set up to determine the effect of nitrates, a pollutant, on the number of chloroplasts present in euglena. Five tanks were set up, each with euglena and a different concentration of nitrate solution: 0%, 0.5%, 1.0%, 1.5%, and 2.0%.
The tanks were placed in a sunny location where each tank received the same amount of light.
Which statement correctly identifies a variable in this experiment?
The independent variable is the concentration of nitrate solution used.
The dependent variable is the number of euglena placed in the tanks.
The independent variable is the amount of sunlight.
The dependent variable is the number of tanks used.
Which statement is best supported by the data in the chart?
After exercise, the nonathletic students had a lower heart rate than the athletic students.
After exercise, the heart rates of the athletic students returned to resting pulse in four minutes.
During exercise, both groups of students had the same increase above their resting pulse.
During exercise, the athletic students had a higher heart rate than the nonathletic students.
Which graphed line best represents this data?
Students were asked to determine if they could squeeze a clothespin more times in a minute after resting than after exercising. An experiment that accurately tests this question should include all of the following except
a hypothesis on which to base the design of the experiment
a large number of students
two sets of clothespins, one that is easy to open and one that is more difficult to open
a control group and an experimental group with equal numbers of students of approximately the same age
The histogram shows data from how many students?
6
7
10
27
Which sentence represents a hypothesis?
Environmental conditions affect the pollination of plants
Boil 100 milliliters of water, let it cool, and then add 10 seeds to the water.
Is water depth in a lake related to available light in the water?
A lamp, two beakers, and elodea plants are selected for the investigation.
An experimental design included references from prior experiments, materials and equipment, and step-by-step procedures. What else should be included before the experiment can be started?
a set of data
a conclusion based on data
safety precautions being used
an inference based on results
A biologist plans to spend a year investigating the mating behavior of a certain species of frog. To make meaningful observations, the biologist should observe
a small number of frogs in their natural habitat
a large number of frogs in their natural habitat
several groups of frogs maintained in different temperatures in the laboratory
several groups of frogs maintained on different diets in the laboratory
Based on experimental results, a biologist in a laboratory reports a new discovery. If the experimental results are valid, biologists in other laboratories should be able to perform
An experiment with a different variable and obtain the same results
the same experiment and obtain different results
the same experiment and obtain the same results
an experiment under different conditions and obtain the sam results
In an experiment, what should be the relationship between the control group and the experimental group?
they should be different in size
they should resemble each other in at least two respects
they should not be similar in any respect
they should be identify in all respects except on
A new concept that is tested in a scientific investigation is known as
a theory
the hypothesis
an inference
an observation
A student was observing cells with a microscope and noted that four cells fit across the diameter of the field of view. If the diameter was 1.6 millimeters, what was the approximate length of a single cell?
1.6 μm
400 mm
400 μm
200 μm
The analysis of data gathered during a particular experiment is necessary in order to
formulate a hypothesis for that experiment
develop research plan for that experiment
design a control for that experient
draw a valid conclusion for that experiment
