Lab Design and Scientific Method Refresher

What step does every scientific experiment begin with?

• hypothesis
• question/problem
• procedures
• conclusion

A testable question should include what two things?

• A hypothesis and question

• A question and a dependent variable

• An independent variable but no dependent variable

• An independent variable and a dependent variable

Possible explanation for an observation that can be tested.

• Hypothesis

• Scientific Law

• Scientific theory

• Critical Thinking

Choose the correct hypothesis for "How will exercising affect your health?"

• IF you have better health, THEN you will exercise.

• IF you exercise, THEN you will have better health.

• Exercising means you're healthy.

A student was doing an experiment using the scientific method. Every three days the student plans to count the green leaves. Which would be a good hypothesis for this experiment?

• If plants are placed in direct sunlight, then they will grow more green leaves.

• If plants are places in bright light, then they will grow more green leaves than in dim light.

• If plants are place in clay pots, then they will grow more green leaves than plastic pots.

• If plants are in warmer temperatures, then they will grow more green leaves.

Which of the following is NOT a rule when writing a hypothesis?

• It is testable

• It is an if/then statement

• it should restate the question

• It is a prediction.

What is an independent variable?

• What a scientist changes in an experiment to test their hypothesis

• What scientist measure to see if it responded to a change

• What happens when you do an experiment

• What you keep the same throughout all experimental groups

How many independent variables should you have in an experiment?

• two

• as many as possible

• four

• one

Molly investigated if the age of students caused them to be better drivers. What is the independent variable?

• Type of car
• Age of student

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...

• type of plant

• the amount of sunlight

• the type of music

• the type of liquid