Which statements describe a physical property of matter? check all that apply. a cumulus cloud is puffy and white. vinegar has a very sour odor. a mixture of baking soda and vinegar produces gas. iron rusts when exposed to water. water boils at 100 degrees celsius. each side of a cube measures 10 centimeters.

What is a traditional chinese touch therapy involving finger pressure applied to specific areas of the body to restore the flow of qi.

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.