What is an observation?

• information you notice and record using your five senses

• scientific idea with a lot of evidence

• something in your experiment that can change

What is an variable?

• information you notice and record using your five senses

• scientific idea with a lot of evidence

• something in your experiment that can change

What is your favorite flavor of ice cream?

What is a scientific hypothesis?

• scientific idea with a lot of evidence

• educated guess/prediction for a single experiment

What is an independent variable in a scientific experiment?

• the variable that changes

• the variable that doesn't change

• the variable that the scientist manipulates/changes

• the variable that the scientist measures/the data collected

What is the independent variable in the following hypothesis?

HYPOTHESIS: If I get more sleep at night, I will be more attentive in science class.

• attentiveness in science class

• amount of sleep

• seat location in class

• what the teacher is teaching that day

In an experiment, a scientist wants to see the effect of types of music on plant growth. What factors should remain constant in the experiment?

• All plants in all groups should be the same species (type of plant).

• All plants in all groups should receive the same type of music.

A student creates a research question, "How does the chemical RTA affect the number of seeds that hatch?" Which of the following is a strong hypothesis?

• If RTA increases, then the numbers of seeds that hatch decrease.

• As RTA increases, then the numbers of seeds that hatch decrease.

• If the numbers of seeds that hatch increases, then RTA decreases.

• As the numbers of seeds that hatch increases, RTA decreases.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

To increase validity of an experiment, a scientist can

• revise the hypothesis

• make-up data

• repeat the experiment to collect more data

A reliable news or information source

• can be trusted to provide true information

• sometimes provide false information

• is not useful in understanding the world

• is always the first choice in a Google search