What Is Air (pre-assessment)
The edge of Earth's atmosphere, as seen by astronauts on the ISS.
Courtesy of The Gateway to Astronaut Photography of Earth.
- Length: 30 Minutes
- Objectives and Standards
- Materials and
- Procedure and
- Handouts and
Air surrounds us, yet we rarely think about its composition or why it is important. It is a mixture of colorless, odorless gases, one of which, oxygen, is necessary for functions within cells. Another gas, carbon dioxide, is produced as waste by most living things and also is required for photosynthesis.
Gas molecules are in constant motion. Because heat makes the movement of gas molecules more pronounced, warm air rises and cool air sinks. Many tiny substances can be suspended in air. Some, such as pollen, dust or smoke, can lead to allergies or asthma in some people. Other substances in air, such as chemicals, can be toxic to everyone. Most people think of air pollution as being outdoors. But frequently, pollutants can become more concentrated in indoor environments because of limited fresh air circulation. Fortunately, there are many ways to improve the indoor air quality of homes, schools or offices.
This unit uses indoor air pollution as a unifying, real-world theme to teach students important physical and life science concepts about gases, air and the respiratory system. It also presents important environmental health concepts related to air quality and indoor spaces.
Objectives and Standards
Allows teachers to estimate students’ prior knowledge related to air, gases, breathing and respiration, and environmental health.
Science, Health and Math Skills
Applying prior knowledge to a new situation
Materials and Setup
Teacher Materials (see Setup)
Several sheets of chart paper to record and display student questions
Materials per Student
Copy of the student page
Have students work individually to complete the pre-assessment.
Procedure and Extensions
Ask students to think about the question, What questions do you have about air? Record students’ questions on a sheet of chart paper to be displayed in the classroom. Allow opportunities for students to answer their own questions as they complete this unit.
Have students complete the pre-assessment individually; then collect and save each student’s form. Students will refer back to their pre-assessment answers at the conclusion of this unit.
Handouts and Media
Students explore basic concepts related to air and the atmosphere, air quality, and associated issues, such as allergens in the places we live, study and work. (11 activities)
In The Science of Air: Explorations magazine, students learn about the properties of air, explore what can be found in dust, make a lung model, read about a pulmonologist, and more.
Rosie's cousin, Riff, comes to visit for the summer, and they are intrigued by the activities of Rosie's mysterious neighbor.
My Health My World: National Dissemination
Grant Number: 5R25ES009259
The Environment as a Context for Opportunities in Schools
Grant Number: 5R25ES010698, R25ES06932