NGSS 3-LS3-2

Science3rd GradeHeredity: Inheritance and Variation of Traits

The Standard

Use evidence to support the explanation that traits can be influenced by the environment.

Next Generation Science Standards

Teacher's field guide

What Students Need to Do: Students compare organisms exposed to different environmental conditions. They use observations or measurements to explain how water, food, light, temperature, or exercise affected a trait.
What Mastery Looks Like: Students can identify the environmental condition, name the affected trait, and cite an observation or measurement. They connect the evidence to a clear cause-and-effect explanation.
Common Misconceptions: Students may think every trait difference is inherited or that environmental changes are passed to offspring. They may also claim one factor caused a difference when several conditions changed.
How to Assess It: Exit ticket: Two bean plants are the same type. One received daily water and grew 18 cm; one received little water and grew 7 cm. Explain the height difference using evidence.

Lesson moves

Grow the same type of seedlings with different water amounts, then measure and graph their heights each week.
Ask students to write: How could food and exercise affect a dog's body size without changing its inherited breed traits?
Give pairs plant and animal evidence cards to match with claims about water, sunlight, food, temperature, or exercise.
Compare photos of sun-grown and shade-grown plants from the schoolyard, then list visible trait differences and possible environmental causes.

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A ready-to-print activity worksheet aligned to 3-LS3-2, with an answer key for the teacher on its own page. No account needed.

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Learning progression

Mastery here sets students up for these next.

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