Honors Biology Quiz 1

2.

You design an experiment to test the effectiveness of commercial fertilizers. You plant 4 tomato seeds. One seed you plant in regular potting soil. The other three you plant in potting soil each with a differnt type of commerical fertilizer. You water and keep it under light the same amount. You measure each plant every day after it germinantes to record the height. You do this every day for a month. Which of the following is the dependent variable in this experiment?

The height of the plants
The plants in the different types of fertilizer
The plant in the potting soil
The soil type

Correct Answer

A. The height of the plants

Explanation

The dependent variable in this experiment is the height of the plants. This is because the height of the plants is being measured and recorded as a result of the different types of commercial fertilizers used. The height of the plants is directly influenced by the independent variable, which is the type of fertilizer used.

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3.

You design an experiment to test the effectiveness of commercial fertilizers. You plant 4 tomato seeds. One seed you plant in regular potting soil. The other three you plant in potting soil each with a differnt type of commerical fertilizer. You water and keep it under light the same amount. You measure each plant every day after it germinantes to record the height. You do this every day for a month. Which of the following is the control (group) in this experiment?

The height of the plants
The plants in the different types of fertilizer
The plant in the potting soil
The soil type

Correct Answer

A. The plant in the potting soil

Explanation

The control group in this experiment is the plant in the potting soil. This is because the control group is the group that does not receive any treatment or manipulation. In this case, the plant in the potting soil is the baseline group that is used to compare the effects of the different types of commercial fertilizers on the other plants. By keeping one plant in regular potting soil without any fertilizer, it allows for a comparison to be made between the height of the plants that received different types of fertilizers and the plant that did not receive any fertilizer.

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4.

You design an experiment to test the effectiveness of commercial fertilizers. You plant 4 tomato seeds. One seed you plant in regular potting soil. The other three you plant in potting soil each with a differnt type of commerical fertilizer. You water and keep it under light the same amount. You measure each plant every day after it germinantes to record the height. You do this every day for a month. Which of the following is the independent variable in this experiment?

The height of the plants
The plants in the different types of fertilizer
The plant in the potting soil
The soil type

Correct Answer

A. The soil type

Explanation

The independent variable in this experiment is the soil type. This is because the researcher is manipulating and controlling the different types of commercial fertilizers that are being used for each plant. The height of the plants is the dependent variable, as it is being measured and recorded to see the effect of the different soil types on the growth of the plants.

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1

5.

You design an experiment to test the effectiveness of commercial fertilizers. You plant 4 tomato seeds. One seed you plant in regular potting soil. The other three you plant in potting soil each with a differnt type of commerical fertilizer. You water and keep it under light the same amount. You measure each plant every day after it germinantes to record the height. You do this every day for a month. Which of the following is ther experimental group in this experiment?

The height of the plants
The plants in the different types of fertilizer
The plant in the potting soil
The soil type

Correct Answer

A. The plants in the different types of fertilizer

Explanation

The experimental group in this experiment refers to the group of plants that are exposed to different types of commercial fertilizer. The other variables, such as the height of the plants, the plant in the potting soil, and the soil type, are not the focus of the experiment and are considered control variables or factors that are kept constant throughout the experiment. The purpose of the experiment is to test the effectiveness of different types of commercial fertilizers on the growth of tomato plants, making the plants in the different types of fertilizer the experimental group.

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6.

Students are conducting an experiment to determine if sugars are present in foods. They heat a test tube containing a sugar solution in a beaker of water. Which of these is an unsafe laboratory practice in this experiment?

Heating the sugar solution in a closed test tube
Rinsing hands with water after handling the materials
Using a test tube clamp to hold the test tube
Wearing safety goggles while heating the sugar solution

Correct Answer

A. Heating the sugar solution in a closed test tube

Explanation

Heating the sugar solution in a closed test tube is an unsafe laboratory practice in this experiment because it can lead to a build-up of pressure inside the test tube, potentially causing it to explode.

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7.

To test the effectiveness of a new medicine, a drug company performed a study. Researchers from the company gave pills that contained the new medicine to one group of patients; they gave pills that did not contain any medicine to another group of patients. Why were the patients not told which type of pill they were taking?

To keep patients from becoming angry
To prevent bias when collecting data
To prevent errors when collecting data
To keep patients from dropping out of the study

Correct Answer

A. To prevent bias when collecting data

Explanation

The patients were not told which type of pill they were taking in order to prevent bias when collecting data. If the patients were aware of whether they were taking the new medicine or a placebo, their expectations and beliefs about the effectiveness of the medicine could influence their perception of its effects. By keeping the patients unaware, the researchers can collect more objective and unbiased data on the effectiveness of the new medicine.

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8.

The ability of water to heat up and cool down slowly. It's responsible for coastal towns having a more even temperature and coastal sea/land breezes.

Surface tension
Cohesion
Capillary action
High heat capacity

Correct Answer

A. High heat capacity

Explanation

High heat capacity refers to the ability of a substance to absorb and store heat energy without a significant change in temperature. In the case of water, it has a high heat capacity due to the strong hydrogen bonding between its molecules. This means that water can absorb a large amount of heat energy before its temperature increases, and it can also release heat energy gradually when it cools down. This property of water is responsible for its ability to heat up and cool down slowly, which in turn contributes to the more even temperatures in coastal towns and the formation of coastal sea/land breezes.

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9.

One of the properties of water shown in the James Bond demo.

Surface tension
Cohesion
Capillary action
High heat capacity

Correct Answer

A. Cohesion

Explanation

Cohesion refers to the attraction between molecules of the same substance. In the context of water, cohesion is responsible for the formation of water droplets and the ability of water molecules to stick together. This property is demonstrated in the James Bond demo, where water droplets are shown to stick to surfaces and form cohesive shapes.

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10.

The propery of water that allows animals, such as the water strider and Jesus Christ lizard, to walk on water.

Surface tension
Cohesion
Capillary action
High heat capacity

Correct Answer

A. Surface tension

Explanation

Surface tension is the property of water that allows animals like the water strider and Jesus Christ lizard to walk on water. Surface tension is the result of cohesive forces between water molecules at the surface, causing it to behave like a stretched elastic sheet. This creates a strong surface that can support the weight of small objects, such as the legs of these animals, without breaking or sinking.

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Honors Biology Quiz 1

I tell you that a plant should take 7 days to sprout in your experiment. This is a form of bias.

Quiz Preview

Students are conducting an experiment to determine if sugars are present in foods. They heat a test tube containing a sugar solution in a beaker of water. Which of these is an unsafe laboratory practice in this experiment?

The ability of water to heat up and cool down slowly. It's responsible for coastal towns having a more even temperature and coastal sea/land breezes.

One of the properties of water shown in the James Bond demo.

The propery of water that allows animals, such as the water strider and Jesus Christ lizard, to walk on water.