Understanding Science and Variables

What is the primary goal of science?

• To collect data

• To understand and explain natural phenomena

• To create new technologies

• To memorize facts

Tags

NGSS.MS-LS2-3

Which of the following best describes the scientific method?

• A fixed set of steps that must be followed in order

• A flexible process used to investigate questions and test hypotheses

• A method used only in laboratory settings

• A process that guarantees correct results

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

In an experiment, what is the role of an independent variable?

• It is the variable that is measured

• It is the variable that is changed or controlled by the experimenter

• It is the variable that remains constant

• It is the variable that is used as a control

Tags

NGSS.MS-PS2-2

Which of the following is an example of a dependent variable in an experiment?

• The amount of sunlight a plant receives

• The growth rate of a plant

• The type of soil used

• The temperature of the room

How does a hypothesis differ from a theory in science?

• A hypothesis is a proven fact, while a theory is a guess

• A hypothesis is a tentative explanation, while a theory is a well-substantiated explanation

• A hypothesis is more complex than a theory

• A hypothesis is always correct, while a theory can be disproven

Which of the following best illustrates the concept of a control variable?

• A variable that is intentionally changed to observe its effect

• A variable that is kept constant to ensure that the effect of the independent variable can be measured

• A variable that is measured to determine the outcome of an experiment

• A variable that is irrelevant to the experiment

Why is it important to have a control group in an experiment?

• To ensure that the experiment is conducted in a laboratory

• To provide a standard for comparison against the experimental group

• To increase the number of variables being tested

• To guarantee the experiment's success

Which of the following statements is true about scientific theories?

• They are guesses that scientists make

• They are unchangeable facts

• They are well-supported explanations based on evidence

• They are the same as hypotheses