The following is an example of how to assess proficiency of this student expectation (SE) or a portion of the SE.

Students might explain that they know that air is around us because they can feel the wind on their skin. They might also observe the leaves moving on a tree with nothing visible touching them and recognize that the air must be moving the leaves. Provide students with tools such as windsocks, ribbon, or pinwheels. Ask them to hold the object still in a space where there is little air movement and describe what is happening. Students should observe that the object doesn't move. Then take them outside or turn on a fan. Ask students what happens to the object. They should be able to explain that the object is moving and it is due to the wind (or moving air).
 

Evidence of air around us may be gathered through demonstrations of moving air. When items such as windsocks, pinwheels, and ribbons move in the wind, students may describe that motion as evidence that air is present. Another way students might observe evidence of air is to blow air into a balloon. When they blow into the balloon, it expands due to the air they blew into it.