Human societies tend to come together precisely where water exists, of course. In places where it's plentiful, water seems less like a substance than an environment: People drink it, cook in it, bathe in it, wash wastes away in it, harness it for power, swim in it. Some 71 percent of Earth's surface is ocean water, and human bodies are about 66 percent water by weight, so that if we have, say, a 128-pound person, about 85 pounds of him or her will be water. If Earth amounts to a watery environment flecked by the landmasses we call continents, the human body amounts to a watery mass with significant proportions of other materials immersed in it.
The purpose of the paragraph is
a. to inform the reader how much water the human body contains.
b. to compare the amount of water in the human body to that of
the Earth's surface.
c. to evaluate how important water is to human societies.
The tone of the paragraph is
a. objective. b. subjective. c. judgmental.
Question 2
The hotness or coolness of the atmosphere is determined by how fast air molecules are moving. If the temperature is warmer, molecules move faster and have more energy. If the temperature is cooler, molecules move slower and have less energy. Temperature is a measure of the average energy of individual particles in a system. The system may be air molecules in the atmosphere, water molecules in the ocean, or iron atoms in molten metal. We measure temperature using a thermometer.
a. comparison-contrast
b. explanation and enumeration c. cause-effect and definition
Polarity of Water
Stereotaxic Surgery on a Human Patient
The arrangement of water molecules in (a) solid ice, and (b) liquid water.
DNA sequence variation in the human genome
Stable oxygen isotopes in water
Manhattan plots resulting from a genome-wide association study of seven common human disease