NGSS 2-LS2-1
The Standard
Plan and conduct an investigation to determine if plants need sunlight and water to grow.
Next Generation Science Standards
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students set up a fair plant test that changes either light or water, but not both. They observe, measure, and record growth, then use the evidence to make a conclusion.
What Mastery Looks Like
- Students can plan a fair comparison with the same seeds, soil, containers, and care. They record growth over time and use the results to explain what affected the plants.
Common Misconceptions
- Students may change both light and water, making the results hard to explain. They may also assume more water always means more growth or count seed sprouting as continued plant growth.
How to Assess It
- Exit ticket: Draw two setups that test light only, then label what stays the same, what changes, and what you will measure.
Lesson moves
Ways to Teach It
Grow matching bean seedlings under different light conditions, keeping water, soil, containers, and observation time the same.
Ask students to write: How can we prove that light, rather than water, caused a difference in growth?
Give groups experiment cards to sort into fair tests and unfair tests, then have them explain each choice.
Compare classroom findings with care labels on garden plants, then plan where each plant should be placed and watered.
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Printable 2-LS2-1 Worksheet
A ready-to-print activity worksheet aligned to 2-LS2-1, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- HS-ESS2-5
Plan and conduct an investigation of the properties of water and its effects on Earth materials and surface processes.
- 2-PS1-1
Plan and conduct an investigation to describe and classify different kinds of materials by their observable properties.
- K-PS3-1
Make observations to determine the effect of sunlight on Earth's surface.
- 1-PS4-3
Plan and conduct an investigation to determine the effect of placing objects made with different materials in the path of a beam of light.
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