Quiz: The Scientific Method

Question 1

A student notices that plants near the window in their classroom grow taller than plants placed in the corner. What is the BEST next step in the scientific method?

Accepted Answer

Form a hypothesis about why the difference exists

Question 2

A hypothesis must be proven true before a scientist can move forward with an experiment.

Accepted Answer

false

Question 3

The variable that a scientist deliberately changes in an experiment is called the _____ variable.

Accepted Answer

independent

Question 4

Which of the following is the BEST example of a scientific question?

Accepted Answer

Does the amount of water a bean plant receives affect how tall it grows?

Question 5

Explain the difference between an observation and an inference. Give one example of each.

Accepted Answer

An observation is something you directly notice using your senses, such as seeing that the sky is cloudy. An inference is a conclusion or explanation you draw based on an observation, such as concluding it might rain because the sky is cloudy.

Question 6

In an experiment testing whether fertilizer helps tomato plants grow taller, a scientist grows two groups of plants: one group receives fertilizer and the other does not. Both groups receive the same amount of water, light, and soil. What is the purpose of the group that receives NO fertilizer?

Accepted Answer

It serves as the control group so results can be compared

Question 7

Repeating an experiment multiple times and getting the same result makes the data more reliable.

Accepted Answer

true

Question 8

The variable that is measured and recorded as the result of an experiment is called the _____ variable.

Accepted Answer

dependent

Question 9

A student writes: 'If plants are given more sunlight, then they will grow taller, because sunlight provides energy for plant growth.' Which part of this statement is the reason, or scientific reasoning?

Accepted Answer

Because sunlight provides energy for plant growth

Question 10

A student conducts an experiment to see if the type of soil affects how fast seeds sprout. They plant seeds in sand, clay, and potting mix. They water each pot with the same amount of water and place all pots in the same sunny window. Explain why it is important that the student keeps the amount of water and the location the same for all three pots.

Accepted Answer

Keeping the water amount and location the same ensures that these factors do not affect the results. If one pot received more water or more sunlight, it would be impossible to know whether the soil type or the water or light caused any difference in sprouting. These are called controlled variables, and they make the experiment fair and the results trustworthy.

Question 11

A conclusion should only be based on the data collected during the experiment, not on what the scientist hoped would happen.

Accepted Answer

true

Question 12

A scientist records the following measurements of plant height after two weeks: What can the scientist BEST conclude from this data?

Accepted Answer

Plants given fertilizer grew taller than plants without fertilizer in this experiment

Question 13

Before designing an experiment, scientists research what is already known about a topic. This step is called gathering _____ information.

Accepted Answer

background

Question 14

Which of the following BEST describes why scientists share their results with other scientists?

Accepted Answer

So other scientists can review, repeat, and verify the findings

Question 15

Qualitative data describes measurements using numbers, such as recording a temperature of 24°C.

Accepted Answer

false

Question 16

A student hypothesizes that mold will grow faster on bread kept in a warm place than on bread kept in a cool place. After the experiment, the student finds that mold grew faster in the warm location. What should the student write in the conclusion?

Accepted Answer

The data supports the hypothesis that mold grows faster in warm conditions

Question 17

A _____ is a well-tested explanation supported by a large body of evidence from many experiments over time.

Accepted Answer

scientific theory

Question 18

A student's experiment results do NOT support their hypothesis. The student thinks they must have made a mistake because the hypothesis should have been right. Explain why it is still valuable in science when a hypothesis is not supported by the data.

Accepted Answer

When a hypothesis is not supported, it is still valuable because it tells scientists what did not work, which helps narrow down possible explanations. Scientists learn from unexpected results and can use them to refine their hypothesis and design a new experiment. Not supporting a hypothesis is not a failure — it is useful scientific information.

Question 19

Which of the following is an example of quantitative data?

Accepted Answer

The caterpillar measured 4.2 centimeters in length

Question 20

Using only one trial in an experiment is enough to draw a reliable scientific conclusion.

Accepted Answer

false

Question 21

The step in the scientific method where a scientist asks 'What do I want to find out?' is called identifying the _____.

Accepted Answer

problem

Question 22

A scientist wants to test whether music affects how quickly students solve math problems. Which of the following would be an appropriate controlled variable in this experiment?

Accepted Answer

The difficulty level of the math problems given to all students

Question 23

A bar graph is an appropriate way to display data when comparing results from different groups in an experiment.

Accepted Answer

true

Question 24

A student records observations about an ice cube melting on a plate in a warm room: Based on this data, what pattern can the student identify?

Accepted Answer

The ice cube decreased in width at a steady rate over time

Question 25

Describe what a procedure is in a scientific experiment and explain why it should be written in enough detail that another person could follow it exactly.

Accepted Answer

A procedure is the step-by-step plan that describes exactly how an experiment will be carried out. It should be written in enough detail so that another scientist could repeat the experiment in the same way. This is important because if another person can follow the same steps and get the same results, it shows that the results are reliable and not just due to how one person set up the experiment.

Quiz: The Scientific Method

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