Bio 137 Semester 1 Review

What is a hypothesis?

• A hypothesis is the right answer to an experiment.
• A hypothesis is the wrong answer to an experiment.
• A hypothesis is an educated guess.
• I don't know.

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable
• independent variable
• data
• control group

Tags

NGSS.MS-PS2-2

What step does every scientific experiment begin with?

• hypothesis
• question/problem
• procedures
• conclusion

How many variables should be tested at a time?

• Three
• Zero
• Two
• One

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

Tags

NGSS.MS-LS1-1

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

Tags

NGSS.MS-PS2-2

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

What is a constant variable?

• factors you keep the same in the experiment

• the group that receives the normal treatment

• scientific idea with a lot of evidence

• educated prediction of what the results will look like

Which of these describes the control group? (Select two)

• The group that receives no independent variable or the normal version of the independent variable.

• The group that receives no dependent variable or the normal version of the dependent variable.

• The purpose is to provide a group to compare to the experimental groups.

• The purpose is to collect more data about the independent variable to increase validity.

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control
• Compound