Interpreting Trait Data

3rd Grade ScienceInheritance and Variation5 pages

About this worksheet

Three data sets drive this 3rd grade science sheet on trait data. Students read a dog family table with fur color, ear shape, and tail length for two parents and three puppies. They then read a bar graph of purple and white pea plant flowers. A bird family table of yellow and orange beaks closes the sheet. The 12 questions build from reading single values to explaining evidence in writing, in line with NGSS 3-LS3-1. The answer key gives the pea plant totals as 14, 6, and 20.

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Curriculum objectives covered

3-LS3-1

โ€œAnalyze and interpret data to provide evidence that plants and animals have traits inherited from parents and that variation of these traits exists in a group of similar organisms.โ€

Questions 2 and 3 trace puppy traits to a parent, questions 6 to 10 read variation from the pea plant graph, and questions 11 and 12 use the bird table as written evidence.

What's inside this worksheet

Section 1: Dog Family Traits

A table lists the Mother Dog (brown, floppy, long), the Father Dog (black, pointy, short), and three puppies. Questions 1 to 5 ask students to read values, trace traits to a parent, and name one trait that varies.

Section 2: Pea Plant Variation

Students read a bar graph of flower colors to find how many plants are purple, how many are white, and the total. Question 10 asks what the data shows about variation.

Section 3: Evidence of Inheritance

A bird family table shows Parent 1 with a yellow beak, Parent 2 with an orange beak, and three babies. Questions 11 and 12 ask students to explain inheritance and variation using the table.

How teachers use it

After the parent matching lessons

Use this once students can name inherited traits. It moves them from pictures to tables and a bar graph, which is the step many 3-LS3-1 tests expect.

Math connection

Section 2 needs students to read a bar graph and add two bars for question 8. Do it during math time if your class is working on picture and bar graphs.

Writing about evidence

Model question 11 on the board with sentence starters. A strong answer names Baby 3's orange beak and links it to Parent 2.

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