Question 1

Which of the following best describes the difference between qualitative and quantitative data, as illustrated by Jane Goodall's research on chimpanzees (see $$image_1$$)?

Accepted Answer

Qualitative data are recorded descriptions, while quantitative data are numerical measurements.

Question 2

A scientist observes that a certain plant grows faster when exposed to blue light compared to red light. She proposes that blue light increases the rate of photosynthesis. What is this proposed explanation called?

Accepted Answer

A hypothesis

Question 3

In the experimental design shown in $$image_3$$, what is the independent variable?

Accepted Answer

The amount of water given to each pot

Question 4

Which of the following is a requirement for a good scientific hypothesis?

Accepted Answer

It must be testable through experiments or observations.

Question 5

A researcher wants to test the effect of fertilizer on plant growth. She uses three groups: one with no fertilizer, one with 100g, and one with 200g of fertilizer. What is the control group in this experiment?

Accepted Answer

The group with no fertilizer

Question 6

Which of the following best explains why replication is important in scientific experiments?

Accepted Answer

It ensures that the results are consistent and reliable.

Question 7

In a controlled experiment, which variable is measured as the outcome?

Accepted Answer

The dependent variable

Question 8

A student claims that 'ghosts cause the lights to flicker.' Why is this not a valid scientific hypothesis?

Accepted Answer

It cannot be tested through scientific methods.

Question 9

Which of the following is an example of a standardized (constant) variable in an experiment testing the effect of fertilizer on plant growth?

Accepted Answer

The type of plant used in all groups

Question 10

A scientist sets up an experiment with two groups of mice: one group receives a new drug, and the other receives a placebo. The scientist measures the change in blood pressure in both groups. What is the dependent variable?

Accepted Answer

The change in blood pressure

Question 11

Which of the following best describes the process of hypothesis-based science?

Accepted Answer

It involves making predictions based on a general statement and testing them through experiments.

Question 12

If a scientist wants to test the effect of temperature on enzyme activity, which of the following would be a proper way to set up the experiment?

Accepted Answer

Keep all variables constant except for temperature, which is varied among groups.

Question 13

Which of the following is an example of quantitative data?

Accepted Answer

The number of seeds that sprout in each pot

Question 14

A researcher repeats an experiment several times and gets similar results each time. What does this demonstrate?

Accepted Answer

Replication increases the reliability of the results.

Question 15

In the context of scientific inquiry, what is the main purpose of making observations?

Accepted Answer

To gather information that can lead to hypotheses and experiments.

Question 16

Which of the following best describes a control group in an experiment?

Accepted Answer

The group that does not receive the experimental treatment.

Question 17

A scientist is testing the effect of sunlight on plant growth. She keeps the amount of water, type of soil, and type of plant the same for all groups. What are these variables called?

Accepted Answer

Standardized (constant) variables

Question 18

Which of the following is NOT a step in the process of scientific inquiry?

Accepted Answer

Ignoring data that does not fit the hypothesis

Question 19

A scientist wants to know if a new medication lowers blood sugar levels. She gives the medication to one group and a placebo to another, measuring blood sugar after one week. What is the independent variable?

Accepted Answer

The medication given

Question 20

Which of the following statements about scientific experiments is correct?

Accepted Answer

A well-designed experiment changes only one independent variable at a time.

The Process of Science: Scientific Inquiry and Experimental Design

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