SECTION 19.1 Forces Within Earth
In your textbook, read about the effects of stress and strain on rocks.
Answer the following questions.
Typical Stress-Strain Curve
Failure
Elastic limit
Stress
Strain
1. What is stress?
2. What is strain?
3. What is compression?

Galaxy whose shape seems different follow no set pattern are classified as

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.