Which of the following is involved in moving air in and out of the lungs?
A. the diaphragm
B. muscles between the ribs
C. the epiglottis
D. both A and B
Answer: D
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Determine where the phrase belongs and select that letter. Which letter best matches the phrase 4-6 km/s in crust
Determine where the phrase belongs and select that letter. Which letter best matches the phrase 4-6 km/s in crust.
Which of the following photographs depicts an igneous rock where the magma cooled slowly at first and then had fast cooling?
A. 
B. 
C. 
D. 
The most important process of cloud formation in the atmosphere is
What will be an ideal response?
Most nuclear power plants originally had a nominal design lifetime of up to 40 years, but recent engineering assessments have established that many plants can operate up to 60 years.
Answer the following statement true (T) or false (F)