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Gliding Skaters and Cold Hands at Winter Camp

Grade 6 practice: skating glide tests and hand-rubbing data from a winter camp show energy moving whenever kinetic energy changes.

Grade 6ScienceInteractive · Printable

Aligned toMS-PS3-5

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What’s included

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

Details

Format: Interactive · Printable
Grade: Grade 6
Subject: Science
Question types: Fill in the blank, Multiple choice, Circle the answer, Sorting, Short answer

About this worksheet

What students practice

Students use glide data to argue that energy leaves a skater when the skater slows down.
Students identify where energy comes from when an object speeds up and where it goes when it slows.
Students use temperature data as evidence that the motion of rubbing hands is transferred to the skin.

How to use

Read paragraphs 1 to 3 together before Part 1. Before the open response, ask students which two tests in the hand table make the strongest pair of evidence.

Curriculum

NGSS standard covered

MS-PS3-5

Argue from evidence that when an object's kinetic energy changes, energy is transferred to or from the object.

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Gliding Skaters and Cold Hands at Winter Camp

Use evidence to track energy when moving things speed up or slow down.

Part 1: Glide tests on Larch Lake

Read the passage and the glide table, then answer the questions.

A Science Weekend on the Ice

1Every February, the outdoor club at Birchwood Middle School spends a weekend at a winter camp beside Larch Lake. Campers sleep in heated cabins, but they spend most of each day outside, skating, snowshoeing and building snow shelters. Camp leader Petteri Laine likes to turn the activities into science. This year he gave camper Ines Okafor a phone with a speed app and a small thermal camera, and asked her group to track what happens to things that speed up and slow down.

2The lake was frozen about 30 cm thick, and a park ranger had checked that the ice was safe. Three strips of it looked different: one was clear, dark ice, one had a thin dusting of new snow, and one lay under about 3 cm of snow. For each glide test, a skater pushed off until the app read 4 m/s, then stood still and glided without pushing until she stopped. Ines timed each glide and measured its length with a tape. Each strip had three glides, and the table shows the means.

3At the end of one glide, a skater coasted slowly into a soft snowbank at the edge of the clear ice. She stopped in less than a second. She left a dent about 20 cm deep, and loose snow sprayed out to the sides.

4Back in the warming hut, the group tested ways to warm cold hands. Each time, a camper's palms started at 21 °C on the thermal camera. The camper then did one thing with both hands for 20 seconds, and the camera checked the palms again. The group waited for the palms to cool back to 21 °C before each new test.