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General Educational Development
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Question 1 of 15
1. Question
To perform his experiment, a scientist must follow a predetermined method. What steps must he take? Choose correct order…
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Question 2 of 15
2. Question
The scientist has an idea as to what the results will be. What is this idea called?
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The hypothesis is the experimenter’s educated guess as to what the results will be. The experiment will then prove or disprove this hypothesis.
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Question 3 of 15
3. Question
In this experiment, which part is the independent variable?
A scientist is studying the effects high levels of processed grains have on the mind by feeding them to rats. The scientist has an idea in his head as to what the results will be, but he would like to confirm this. His idea is that rats fed with highly processed grains will not think as clearly as those fed a healthier diet. To perform his experiment, he feeds a specific amount of highly processed grains to one sample of rats for a set amount of time, while the others are fed a diet of plant-based foods. Each set of rats is then sent through a maze individually and timed to determine the speed at which they are able to solve the maze.
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The diet is the one piece that the scientist is changing, which makes it the independent variable. Everything else stays the same.
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Question 4 of 15
4. Question
Which part is the dependent variable?
A scientist is studying the effects high levels of processed grains have on the mind by feeding them to rats. The scientist has an idea in his head as to what the results will be, but he would like to confirm this. His idea is that rats fed with highly processed grains will not think as clearly as those fed a healthier diet. To perform his experiment, he feeds a specific amount of highly processed grains to one sample of rats for a set amount of time, while the others are fed a diet of plant-based foods. Each set of rats is then sent through a maze individually and timed to determine the speed at which they are able to solve the maze.
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The dependent variable is the outcome of the change in the independent variable. When the independent variable (diet) is changed, the dependent variable (speed) should change as well.
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Question 5 of 15
5. Question
What could be considered the control?
A scientist is studying the effects high levels of processed grains have on the mind by feeding them to rats. The scientist has an idea in his head as to what the results will be, but he would like to confirm this. His idea is that rats fed with highly processed grains will not think as clearly as those fed a healthier diet. To perform his experiment, he feeds a specific amount of highly processed grains to one sample of rats for a set amount of time, while the others are fed a diet of plant-based foods. Each set of rats is then sent through a maze individually and timed to determine the speed at which they are able to solve the maze.
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The control is the part that is “normal” and is not being tested; the part that has been left alone
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Question 6 of 15
6. Question
The test results show that the rats that were fed with highly processed grains solved the maze at a slightly slower pace than those fed with a plant-based diet. Based on these results, is the experiment finished?
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Experiments can be affected by many conditions, which is why they must be repeated multiple times to ensure accuracy.
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Question 7 of 15
7. Question
Which method would be the best to display the results of the experiment?
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A pie chart is best for displaying information as percentages of a whole, which these are not. A line chart is best for displaying a linear change. A bar chart is best for this situation because it shows a quantitative amount (the percentages the rash has reduced) for several different samples (each individual).
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Question 8 of 15
8. Question
The individual who does not apply skin cream during this experiment would be what?
A scientist is trying to determine the effects of certain creams on skin rashes. He has a sample of four different individuals. Three individuals take three different creams (Creams A, B, and C) and one does nothing. After three days, Cream A has reduced the rash by 50%, Cream B has reduced the rash by 70%, Cream C has reduced the rash by 30%, and the individual who did nothing had the rash reduced by 15%.
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The control would be the sample that was left alone. The person who did nothing to their skin would have a healing process unaided by the skin creams.
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Question 9 of 15
9. Question
Using the scientific method, what would be the next step after analyzing these results?
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In the scientific method, the conclusion is the final step following analysis
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Question 10 of 15
10. Question
What is the broadest classification an animal can have?
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Animals (and humans) are classified into categories, the broadest of which is the kingdom.
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Question 11 of 15
11. Question
What is the name of the process in which plant leaves lose water and it becomes a vapor?
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Evapotranspiration is similar to evaporation, but also includes the added component of plant transpiration.
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Question 12 of 15
12. Question
The scientist should find his sample of surface water from which source?
A scientist is conducting an experiment involving water. He is studying surface water, groundwater, and surface runoff. The experiment he is conducting specifically pertains to the process by which plant leaves lose water and it becomes a vapor.
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Surface water is found above ground in lakes, rivers, and streams.
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Question 13 of 15
13. Question
Surface runoff refers to what type of water?
A scientist is conducting an experiment involving water. He is studying surface water, groundwater, and surface runoff. The experiment he is conducting specifically pertains to the process by which plant leaves lose water and it becomes a vapor.
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Surface runoff is water runoff that flows into water bodies such as rivers, lakes, streams, ponds, or creeks. This typically comes from rain.
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Question 14 of 15
14. Question
In this example, which is the producer?
A blade of grass absorbs the rays of the sun and converts them into food. A rabbit then eats the grass to sustain its life. A coyote then captures and eats the rabbit to survive. Eventually, the coyote dies. The coyote’s body breaks down and slowly turns back into soil for the plants.
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The producer is the one that creates its own food. The grass creates its own food by using photosynthesis.
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Question 15 of 15
15. Question
In this example, which is the secondary consumer?
A blade of grass absorbs the rays of the sun and converts them into food. A rabbit then eats the grass to sustain its life. A coyote then captures and eats the rabbit to survive. Eventually, the coyote dies. The coyote’s body breaks down and slowly turns back into soil for the plants.
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The consumer cannot create its own food, and so it consumes the producer, or the plant. The secondary consumer is carnivorous and consumes the primary consumer. For example, the coyote eats the rabbit that ate the plant; therefore, the coyote is the secondary consumer.
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