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No-Touch Questions at the Oxbow Survey Hut

Use model-boat observations and electric-force data at a lake survey hut to predict motion and plan questions about 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
14 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 testable cause-and-effect questions about electric and magnetic forces across gaps.
Students use observations to predict how objects may move without touching.
Students identify changes and controls for tests of noncontact forces.

How to use

Read the survey-hut notes together. Have students explain their predictions using the observations, then write questions that could guide new tests.

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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No-Touch Questions at the Oxbow Survey Hut

Use observations to predict motion and ask questions about its cause.

Model Boats in the Hut

Read the notes and results. Use them to predict what might happen and choose questions to test.

A Calm Place to Investigate

An oxbow lake is a curved lake beside a river. At a survey hut near its shore, visitors learn how researchers study the water. Inside the hut, Imani sets up two force investigations using small models. The windows are closed, and the fans are off.

For the first investigation, an adult fastens a bar magnet to each of two foam boats. The magnet ends are called poles, labeled north and south. The adult holds one boat still in a basin of calm water. The other boat can move. Before each try, the water settles and the boats start at the same marked gap. The adult changes which poles face each other, keeping the boats, magnets, and water level the same.

Imani watches which way the free boat first moves while the boats are still apart. Each tested pole pair gets six tries. Later, she uses a plastic spoon and tiny tissue specks for a second investigation. Rubbing plastic with a cloth can give it electric charge. She watches for motion before the spoon touches a speck.

Which cause-and-effect question do the boat tests investigate?