What are the major gaseous substances that make up Jupiter and Saturn?
A. carbon dioxide and water vapor
B. methane and ozone
C. nitrogen and oxygen
D. hydrogen, hydrogen-rich compounds, and helium
Answer: D
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The greater the mass of a star, the _______________ it moves through its life cycle
a. faster b. slower c. Neither of these; mass has no effect on the life cycle of a star.
If a tree's range can migrate 30 km in a century, and warming is expected to cause isotherms to move north- and southward 300 km in a century, what can be expected to occur? Explain. Would Scotch pine (200 km per century) be similarly affected?
What will be an ideal response?
As a scuba diver descends into the open ocean, pressure
A) increases and temperatures decrease. B) decreases and temperatures increase. C) and temperatures decrease. D) and temperatures increase.
What is a gluon?
a. A flavor of quark. b. The most newly discovered lepton. c. A combination of three complementary quarks. d. A particle exchanged by quarks. e. A particle exchanged by electrons to give electrical repulsion.