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Cooling Down on the Trail Crew

Grade 6 life science: use a trail crew member's heart rate, temperature and body mass data to argue how body systems work together to cool the body.

Grade 6ScienceInteractive · Printable

Aligned toMS-LS1-3

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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 heart rate, temperature and body mass data to show how body systems respond to heat.
Students argue that the nervous, circulatory, skin and excretory systems interact to keep body temperature steady.

How to use

Read the passage and the table together, then have students explain each change in the data before they write the argument at the end.

Curriculum

NGSS standard covered

MS-LS1-3

Argue how the body is a system of interacting subsystems, from cells to tissues, organs and organ systems.

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Cooling Down on the Trail Crew

Use a work-day health check to argue that body systems interact.

The work-day checks

Read the passage and study the table. Then answer the questions.

A Hot Morning on the Ridge Trail

1Every July, a youth conservation crew spends two weeks repairing trails in a state forest. On the hottest day of the first week, crew leader Ben Halvorsen, who is trained in wilderness first aid, asked 13-year-old Leilani Ortiz to help with a health check he uses to teach the crew about working in heat.

2At 8:00, before work started, he measured her body temperature with an ear thermometer, counted her heartbeats at her wrist for one minute and weighed her on a camp scale. Then Leilani spent an hour hauling buckets of gravel and raking it into the trail. At 9:00 he measured her again. During a 15-minute break in the shade she drank 0.5 L of water, which has a mass of 0.5 kg, and he took a third set of measurements at 9:15. After a second hour of work in hotter air, he measured her one last time at 10:15. She did not eat or drink during either work hour.

3Mr. Halvorsen also wrote down what he saw. By 9:00, Leilani's shirt was soaked and sweat was dripping from her forehead. The skin on her face and arms looked flushed red and felt hot to the touch. At 9:15 the redness had faded a little. Just after the last check, Leilani noticed that her urine was darker yellow and smaller in amount than it had been in the early morning.

4Back at camp, Mr. Halvorsen explained some of what goes on inside the body. Working muscle cells release heat as they use energy, and the blood carries that heat around the body. Nerve cells in the skin and in the brain sense temperature. A part of the brain compares these signals and sends messages through nerves to sweat glands in the skin and to the walls of small blood vessels. The kidneys filter the blood and control how much water leaves the body as urine.