STC Measuring Time: Goals
In this unit, students investigate the history of timekeeping and experiment with various timekeeping devices. From their experiences, they are introduced to the following concepts, skills, and attitudes.
- Time can be measured by observing the natural cycles of the sun and the moon.
- Shadows cast by the sun can be used to measure and predict the passage of time during a day.
- The phases of the moon follow a cycle that can be used to measure and predict the passage of time during a month.
- Mechanical devices can be constructed and used to measure specific intervals of time consistently.
- The accuracy of mechanical clocks is dependent on their design, the materials from which they are constructed, and their energy source.
- Observing and recording information about the natural cycles of the sun and the moon.
- Learning to plan and conduct experiments in which variables are controlled.
- Predicting and testing how changing a variable affects the outcome of an experiment.
- Interpreting test results to draw conclusions about how changing variables affects the outcome of an experiment.
- Communicating results through writing in notebooks; organizing information in charts, tables, and graphs; and discussion.
- Reading and researching science materials for more information.
- Applying previously learned concepts and skills to solve a problem.
- Developing an interest in exploring and investigating time.
- Recognizing the importance of repeating tests to validate results.
- Appreciating the advances people have made in measuring time and explaining natural phenomena.