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Clocks and Stopwatches

Clocks and Stopwatches

TEKS Objective

The student is expected to collect, record, and compare information using tools, including computers, hand lenses, rulers, primary balances, plastic beakers, magnets, collecting nets, notebooks, and safety goggles; timing devices, including clocks and stopwatches; weather instruments such as thermometers, wind vanes, and rain gauges; and materials to support observations of habitats of organisms such as terrariums and aquariums.


Essential Understanding

The student uses age-appropriate tools and models to investigate the natural world.

Science Background

Measurement of Time: Encyclopedia.com (website) - Includes history, origins, early instruments, clocks and time zones.

Measurement of Time
Encyclopedia.com

Time Units of Work: New Zealand Math (website) - Provides information on a measurement that cannot be seen or touched, yet effects all aspects of life.

Time Units of Work
New Zealand Math, www.nzmaths.co.nz

Signature Lesson

Elapsed Time in the Real World: National Security Agency (PDF) - Introduce students to the concept of elapsed time by having them use clocks to collect, record and compare information about how long it takes to complete everyday activities. This unit is broken into three lessons that develop the concept with increasing complexity. If time is limited, select Lesson 1 on page 2.

Elapsed Time in the Real World
National Security Agency, www.nsa.gov

Supporting Lessons

Ready, Set, Escape: Teach Engineering (website) - Students design simple yet accurate timing devices.

Ready, Set, Escape
Teach Engineering, www.teachengineering.org

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