Variables and Hypothesis Review
Presentation
•
Science, Biology
•
9th - 10th Grade
•
Practice Problem
•
Medium
+2
Standards-aligned
Laura Rodriguez
Used 201+ times
FREE Resource
3 Slides • 5 Questions
1
Variables and Hypothesis Review
Practice with components of scientific investigations
2
Variables
The Independent variable (IV) is the factor that the investigator changes
The Dependent variable (DV) is the factor that changes in response to the IV
The constants are the factors that are kept the same
3
Multiple Choice
What is the IV in this question: How does the distance from an eye chart affect the number of letters that are recognized on a line
The eye chart
The distance from the eye chart
The line
The number of letters recognized
4
Multiple Choice
Amari wants to test the effect of the amount of light energy on plant growth. What is the dependent variable?
Type of plant
Plant container
Amount of light
Plant growth
5
Multiple Choice
Kay wants to determine if the length of the string affects the number of times a pendulum will swing back and forth in 10 seconds? What is the IV and the DV
IV: pendulum, DV: number of seconds
IV: length of string, DV: times the pendulum swings
IV: times the pendulum swings, DV: number of seconds
IV: length of string, DV: number of seconds
6
Hypothesis
A hypothesis is a suggested solution to a problem
Written as an "If... then... " statement
Example: If the amount of water given a plant is increased, them the plant will increase in height
7
Multiple Choice
Which is a valid hypothesis for this example: Ahleayah wants to investigate if the amount of fertilizer used on a field will affect the number of earthworms found there.
If there are earthworms, then there will be fertilizer.
If the amount of fertilizer is increased, then the number of earthworms will decrease
Can earthworms live in fertilized fields?
Fertilizer kills earthworms
8
Multiple Choice
What is a valid hypothesis for this example: Dante wants to investigate if the amount of oxygen in the water will have an effect on the oyster population.
If the amount of oxygen in the water is decreased, then the number of oysters will decrease.
Can oysters breathe oxygen in the water?
Oysters will turn blue when exposed to oxygen.
If there are oysters in the water, then there will be less oxygen.
Variables and Hypothesis Review
Practice with components of scientific investigations
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