Variables and Hypothesis Review

Presentation

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Science, Biology

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9th - 10th Grade

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Practice Problem

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Medium

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NGSS

MS-LS1-5, MS-LS2-1, MS-PS2-2

Standards-aligned

Laura Rodriguez

Used 192+ times

FREE Resource

3 Slides • 5 Questions

Variables and Hypothesis Review

Practice with components of scientific investigations

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

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

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

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

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

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

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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