Chemistry of Life (Quiz)

High specific heat

A lake's temperature remains fairly constant even as the air above it cools in the evening. This resistance to rapid temperature change is due to water's

B

All of the following are key components of the process in the Nitrogen Cycle EXCEPT: A) lightning B) factories C) dead plants and animals D) bean plants with nodules on roots

Can form bonds in up to 4 different directions

Carbon atoms are the foundation of many of life's building blocks. Carbon is able to form a wide variety of different compounds because it

C

How would you expect the negative effects of global warming to differ from what is currently observed if water was nonpolar instead of polar? The effects would: A) increase, because a loss of the polarity would lead to a higher specific heat for the oceans B) decrease, because a nonpolar water molecule would be able to absorb more heat without changing the ocean's temperature C) increase, because the loss of polarity would reduce water's ability to moderate temperature D) decrease, because a nonpolar water molecule would be less susceptible to temperature change

Most of their bonds are non-polar covalent, so they are not attracted to water

Hydrocarbons are not very soluble in water because

Covalent bonds

In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by

Carbon may be produced by: - factories, automobiles and other such things that burn fossil fuels. - exhaled by organisms - may come from decomposing fossils After it is produced, it may: - Be used by plants and turned into O - contribute to the acidification in the oceans - used in the calcification process - used in the make up of living organisms (and thus shared as one organism eats another)

It can be said that some of the carbon atoms in our amino acids and proteins may have been released into the atmosphere by animals across the globe. Summarize the process by which carbon can be cycled through the ecosystem from exhale to ingestion.

electrons shared in the covalent bonds spend more time around the oxygen atom

The partial negative charge in a water molecule occurs because the

C

What do water's properties of cohesion, surface tension, and adhesion have in common? A) All are caused by the low electronegativity of the oxygen atom. B) All have to do with the ionic bonds between water's atoms. C) All are properties related to the attraction between water molecules. D) All result from the bonding within the hydrogen atom.

C

Which of the following effects is a direct result of the high specific heat of water? A) Ice caps float on liquid water in the arctic because ice has a lower density than water. B) Lakes do not freeze solid in winter, even at below freezing temperatures. C) Cells resist temperature changes, even with internal processes that are exothermic. D) Evaporation of sweat from the skin helps keep people from overheating.