week 2 review

In any experiment, the independent variable ______________.

• remains the same to not mess up the experiment

• is purposely changed to test the hypothesis

• is known by the scientist before doing the experiment

Tags

NGSS.MS-PS2-2

HYPOTHESIS: Does study time affect the student's score on an test?

Use the table to answer questions 5 and 6.

Suppose you collected this data from students in your school. What is the independent variable in the study?

• The Students

• The Study Time

• The Grade on the Quiz

What part of the experiment changes as a result of the independent variable?

• The students

• The study time

• The grade on the quiz

Hypothesis: Does study time affect the student's score on an test?

In your opinion what part of the experiment is being controlled?

• The student responses

• The time students study

• The speed students answer questions

• The questions on the test

Which of the following is an example of quantitative data?

• Observing

• Measurements

• Descriptions

Another definition for hypothesis is

• independent variable

• dependent variable

• an educated guess

• control variable

The independent variable is the ONE thing you _____.

• change
• keep the same
• experiment with
• investigate

A student wants to test the effects of type of exercise on heart rate.  What is the dependent variable?

• heart rate
• type of exercise
• amount of exercise
• time of day exercise occurs

How many variables can be tested in a controlled experiment?

• one
• two
• three
• as many as possible

Plant A did not receive any water, it is "untested" and only used for comparison. Plant A is known as the...

• Independent Variable

• Control Group

• Experimental Group

• Controlled Variables