The primary causes of acid deposition are ________
A) soil dust and sand
B) sulfur dioxide and nitrogen oxides
C) tropospheric ozone
D) radon gas and fuelwood smoke
E) carbon monoxide and formaldehyde
B
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What naturally-occurring material is composed of a mixture of rock particles, decaying plant and animal matter, water, air and microscopic organisms?
What will be an ideal response?
From quartz's hard physical property, what can be inferred of its bonding structure?
A) an interlocking three-dimensional framework of evenly spaced groups B) an interlocking three-dimensional framework of unevenly spaced groups C) two-dimensional sheets of hexagonally bonded groups, loosely bonded between sheets D) rhombically shaped ionic bonds between groups with even cleavage planes
Of the following substances, which are the common elements in igneous rocks?
Silicon, rubidium, nitrogen, carbon, sodium, manganese, hydrogen, oxygen, potassium, calcium, phosphorous, aluminum, iron, chlorine, magnesium, uranium, helium, gold What will be an ideal response?
Judge the following sentence according to the criteria given below: Reef-building corals are not able to survive in nutrient-poor tropical waters BECAUSE they receive most of their nutrition by capturing tiny planktonic food with their stinging
tentacles. A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.