Understanding Living Things and Variables (Unit 1 Review)

Which of the following is NOT one of the 8 characteristics of living things?

• Growth and development

• Ability to move

• Response to stimuli

• Reproduction

What is the main difference between an observation and an inference?

• An observation is a guess, while an inference is a fact.

• An observation is a fact, while an inference is a guess.

• An observation is a prediction, while an inference is a measurement.

• An observation is a measurement, while an inference is a prediction.

Which of the following is an example of a qualitative observation?

• The plant is 15 cm tall.

• The liquid has a pH of 7.

• The sky is blue.

• The temperature is 25°C.

In a scientific experiment, what is the purpose of the control group?

• To test the effect of the independent variable

• To serve as a standard for comparison

• To ensure the experiment is valid

• To manipulate the dependent variable

Identify the independent variable in the following scenario: A scientist is testing the effect of different amounts of sunlight on plant growth.

• Amount of sunlight

• Type of plant

• Growth of the plant

• Soil type

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which of the following is a quantitative observation?

• The solution is clear.

• The metal is shiny.

• The mass of the sample is 5 grams.

• The flower smells sweet.

In the scientific method, what is the next step after forming a hypothesis?

• Conducting an experiment

• Making an observation

• Drawing a conclusion

• Analyzing data

Which of the following is a constant in an experiment?

• The variable that is changed

• The variable that is measured

• The variable that remains the same

• The variable that is predicted

Tags

NGSS.MS-PS2-2

In a study to test the effect of temperature on enzyme activity, what is the dependent variable?

• Temperature

• Enzyme activity

• Type of enzyme

• Time of reaction

Which of the following best describes a hypothesis?

• A proven fact

• A testable prediction

• A random guess

• A detailed observation