Name ____________________________ Date ______________________ Period ________________
Hypothesis Practice
Hypothesis Writing Review
The format for writing a hypothesis is…
If (then describe what you will do in the experiment)
then (predict the outcome of the experiment),
because (what is your reasoning, or what does the research say?).
For each problem or question write a hypothesis, circle the independent variable, and
underline the dependent variable.
1. Does the amount of time watching T.V. affect the reading scores of fourth graders?
2. Are there more bacteria on the toilet handle or on my science desk?
3. Does wing length affect the distance a paper airplane flies?
4. Hypothesis Bob predicted that giving detentions for missing homework would increase the
amount of homework turned in his local middle school. He recorded the number of missed
homework for 30 days, and then the school agreed to assign detentions for each missed
homework assignment. He then compared the numbers to see if the policy had any effect.
5. Hypothesis Bob wants to see if different smells travel at the same speed. He sprays a can of
hairspray, peppermint air freshener, and insect repellant at the same time. Six friends stand
around him in a large circle, five feet from the center of the circle where Bob stood.
Created by G.Baker 2016 www.thesciencequeen.net
Variable Practice
INDEPENDENT
DEPENDENT
CONTROL
I Change
I Measure
What stays the
same
Directions:
Identify the independent, dependent, and control variables in the following experiments.
6. If you increase the amount of blood in the water, then you will increase the number of sharks
in the area.
a. Independent : ________________________________________________
b. Dependent: __________________________________________________
7. If you increase the amount of milk you drink, then you will increase the strength of your bones.
a. Independent: ________________________________________________
b. Dependent: __________________________________________________
8. Mario studied how far room temperature water would spurt out of a plastic milk carton when
3mm holes were punched at different heights from the bottom of the container.
a. Independent ________________________________________________
b. Dependent ________________________________________________
c. Control
________________________________________________
9. Nick wanted to see how high an ice cube would float in different temperatures of water.
a. Independent ________________________________________________
b. Dependent ________________________________________________
c. Control
________________________________________________
10. Mr. Eary wanted to see how different types of music affected students' pulse rates. He played
different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music.
a. Independent ________________________________________________
b. Dependent ________________________________________________
c. Control
________________________________________________
Created by G.Baker 2016 www.thesciencequeen.net