Question 1

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

Accepted Answer

A group where the independent variable is not manipulated at all.

Question 2

In a study testing the effect of sunlight exposure on plant growth, which of the following would be considered a quantitative data point?

Accepted Answer

The average height of the plants in centimeters.

Question 3

Why is it important to include a control group in a scientific experiment?

Accepted Answer

To provide a baseline for comparison to determine the effect of the independent variable.

Question 4

Which of the following is an example of qualitative data?

Accepted Answer

The description of a solution as 'cloudy' or 'clear'.

Question 5

A researcher changes the temperature in an experiment to observe its effect on enzyme activity. What type of treatment is this?

Accepted Answer

Experimental treatment

Question 6

Which of the following statements about data collection is correct?

Accepted Answer

Data collection involves performing the experiment and gathering observations.

Question 7

In an experiment, the independent variable is:

Accepted Answer

The variable that is manipulated or changed by the researcher.

Question 8

A scientist records the number of bacterial colonies on a petri dish after applying different antibiotics. This type of data is:

Accepted Answer

Quantitative

Question 9

Which of the following best illustrates the use of both qualitative and quantitative data in an experiment?

Accepted Answer

Measuring the mass of a sample and recording its color.

Question 10

If a hypothesis is not supported by the data collected in an experiment, what is the most appropriate next step?

Accepted Answer

Repeat the experiment and consider revising the hypothesis.

Question 11

Which of the following is NOT a characteristic of a controlled experiment?

Accepted Answer

It does not include any data collection.

Question 12

A student describes the taste of a solution as 'bitter' and records its pH as 8.2. What types of data are these?

Accepted Answer

'Bitter' is qualitative and 8.2 is quantitative.

Question 13

Which of the following best explains why experiments should be repeated?

Accepted Answer

To ensure the reliability and accuracy of the data collected.

Question 14

In a clinical drug trial, the group receiving a placebo is an example of:

Accepted Answer

Negative control

Question 15

Which of the following is a correct statement about the relationship between independent and dependent variables?

Accepted Answer

The independent variable is manipulated to observe changes in the dependent variable.

Scientific Inquiry: Experimental Design and Data Collection

Study Guide - Practice Questions