Free Printable WorksheetScienceGrade 3Science CurriculumLS.3.30

3.30 Variation Can Provide Advantages Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 3 Science worksheet provides structured practice on 3.30 Variation Can Provide Advantages. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Variation Can Provide Advantages - Which explanation best describes how variations in traits can provide advantages in surviving, finding mates, and reproducing. (NGSS 3-LS4-2; CCC: Cause and Effect)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 3

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 3.30 Variation Can Provide Advantages skill assessments:

Problem 1Difficulty: Mastery

A population of ground-nesting birds varies in egg shell thickness. Thicker shells protect eggs from being crushed by small predators, but thicker shells take more calcium to make.In one area, calcium-rich food is common. In another area, calcium-rich food is rare, but egg-crushing predators are common.

Which explanation best describes how shell-thickness variation could lead to different reproductive success in the two areas?

APredators cannot affect eggs because eggs are not living.

BThicker shells always hurt chicks, so thin shells will always be best.

CBirds will make the same shell thickness everywhere because eggs are always the same.

DWhere predators are common, thicker shells may help more eggs survive, but where calcium is rare, thinner shells may be easier to make; different conditions can favor different shell thicknesses.

Solution & Explanation:Traits have costs and benefits. Environmental factors like resources and predators can change which variation leads to more eggs hatching and thus more reproduction.

Problem 2Difficulty: Mastery

A population of birds varies in feather thickness and migration timing.• Thick feathers help during cold snaps but add weight.• Early migration avoids cold snaps but risks arriving before food is ready.A sudden cold snap happens earlier than usual, and food starts late at the destination.

Which explanation best describes why multiple variations could each be advantageous in this complicated year?

ASome birds may survive best by having thick feathers even if they migrate later, while others may survive by migrating early even with thinner feathers; different combinations could work depending on conditions they face.

BAll birds will choose the same best combination once the cold snap starts.

CFeather thickness and migration timing cannot affect survival.

DEarly migration always works best no matter what happens with food.

Solution & Explanation:When there are multiple changing factors, there may be more than one successful strategy. Variation provides options that can lead to survival and reproduction for different individuals.

Problem 3Difficulty: Mastery

A fish population varies in how many young parents care for. Some parents guard a small number of eggs carefully; others do not guard but lay many eggs.A new predator eats unguarded eggs, but guarding uses time that could be used to find food.

Which explanation best describes how this variation could affect which fish leave more offspring?

AGuarding may help when predators eat eggs, but laying many eggs may work when food is plentiful; both strategies could succeed under different conditions.

BEgg predators cannot affect reproduction because eggs are not alive.

CNot guarding is always better because parents can find food.

DAll fish will start guarding eggs because predators exist, so variation ends immediately.

Solution & Explanation:Different reproductive strategies have costs and benefits. Environment decides which strategy leads to more surviving young, maintaining variation.

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 3 Science students. It aligns with educational standard LS.3.30 (Grade 3 science skill focused on Variation Can Provide Advantages.).