Explain why our ears may "pop" with changes in elevation.
What will be an ideal response?
Answers may vary.
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The rare earth elements that are considered extremely important for widely used modern technologies include
a. scandium and yttrium b. scandium, yttrium and the 15 lanthanides c. yttrium, cobalt and the 15 lanthanides d. scandium, nobelium and the 15 lanthanides e. the 17 lanthanides alone
The distance between lines of longitude is equal across the globe
a. True
b. False
Indicate whether the statement is true or false
Briefly list and describe the stages of the demographic transition model
What will be an ideal response?
What mechanism is being used to gain new information regarding deep sea circulation?
A) Acoustic tomography B) ACDP systems C) Electromagnetic field detectors D) Drift cards