Spots of sunlight on the ground cast through openings between leaves in trees above are actually
A. images of the Sun.
B. due to refraction of sunlight.
C. part of a solar eclipse.
D. all of the above
Answer: A
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Radioactive iodide gas released from the Chernobyl nuclear accident in 1986 has been linked to ________
A) lung cancer B) thyroid cancer C) pancreatic cancer D) teratogenic birth defects
The New Madrid and San Francisco earthquakes were of similar magnitudes, but the felt area of the New Madrid quakes was much smaller.
Answer the following statement true (T) or false (F)
Human-induced pollution enters the atmosphere from both ____
A) fixed and natural sources B) natural and secondary sources C) fixed and mobile sources D) natural and primary sources
Sometimes, people say that plants make energy from the sun. However, plants make sugars using sunlight. Stating that plants make energy is
A) a violation of the Law of the Conservation of Momentum. B) a violation of the First Law of Thermodynamics. C) a violation of the Law of Inertia. D) a violation of the Second Law of Thermodynamics.