A vertical air current that is generated by temperature-induced density differences is an example of heat transfer by
A) advection.
B) convection.
C) conduction.
D) transmission.
E) diffusion.
B
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Passive solar heating systems involve
A. green roofs. B. pumping a heat-absorbing fluid through collectors on the roof. C. wind turbines with solar panels attached. D. foil sheets under the floor. E. adobe walls and windows that face the sun and store the collected solar energy.
If a widow's peak hairline is dominant and a straight hairline is recessive, then
A) all the children of two widow-peaked parents will have widow's peaks. B) some of the children of two widow-peaked parents will have straight hairlines. C) all the children of two straight-hairline parents will have straight hairlines. D) some of the children of two straight-hairline parents could have widow's peaks.
If there are over 100 elements on the periodic table of elements, it would stand to reason that there would be millions of ways these elements could combine to form minerals. However, there are only 4000 named minerals
Why might there be so few minerals on Earth when there are so many possible combinations? What will be an ideal response?
Experiments in which conditions are deliberately altered and all other variables are held constant are known as ________ experiments.
A. Natural B. Hypothetical C. Double-blind D. Probability E. Manipulative