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Questions at the Banner-Tag Table

Use craft-fair model observations to ask cause-and-effect questions about magnetic and electric forces across gaps.

Grade 3ScienceInteractive · Printable

Aligned to3-PS2-3

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What’s included

Single worksheet
Auto-graded online
1 NGSS standard
Printable answer key
15 questions
Classroom-ready

Details

Format: Interactive · Printable
Grade: Grade 3
Subject: Science
Question types: Fill in the blank, Multiple choice, Matching, Circle the answer, Sorting, Short answer

About this worksheet

What students practice

Students ask cause-and-effect questions about electric and magnetic forces between objects that are not touching.
Students use observations to identify testable questions and fair comparisons about noncontact forces.
Students support claims about noncontact forces with evidence from model tests.

How to use

Read the spoke-tag team's model notes together, then have students use the observations to choose, sort, and write testable cause-and-effect questions.

Curriculum

NGSS standard covered

3-PS2-3

Ask questions about cause and effect in electric and magnetic forces between objects that are not touching.

Preview

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Questions at the Banner-Tag Table

Use model observations to ask about forces across a gap.

Read the model notes

Read about the tests at the community craft fair. Use the observations to answer the questions.

A Banner-Tag Problem

At a community craft fair, Rowan and Keiko were designing small tags for a hanging banner. They made a model to study forces that might move a tag across a gap. Their model used a small steel washer on a cardboard lane and a bar magnet held near one end of the lane.

They kept the washer, lane, and magnet the same. When the starting gap was 2 centimeters, the washer slid toward the magnet before touching it in 5 out of 5 tries. When the gap was 5 centimeters, it slid toward the magnet in 1 out of 5 tries. The washer was not touching the magnet when motion began.

Next, the team held two small magnets 1 centimeter apart. With matching poles facing, the magnets moved apart in 4 out of 4 tries. With unlike poles facing, the magnets moved together in 4 out of 4 tries. The magnets began moving while a gap remained.

For an electric-force model, the team rubbed a plastic comb with wool 10 times. They held it 1 centimeter from a small paper square. The paper moved toward the comb before touching it in 4 out of 5 tries. With an unrubbed comb at the same gap, the paper moved in 0 out of 5 tries.

Which cause-and-effect question is investigated by comparing the two washer tests?

A. Does changing the starting gap affect whether the washer moves toward the magnet?
B. Does changing the washer's color affect how much it weighs?
C. Does changing the cardboard lane affect the magnet's color?
D. Does changing the banner's color affect the length of its string?