There are about _____ in 2018
A: 5.35 billion people on Earth (the same as for the past 6 years)
B: 9 billion people on Earth
C: 10 billion people on Earth
D: 7.5 billion people on Earth
D. 7.5 billion people on Earth
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A parcel of saturated air at 20°C would have approximately ________ times ________ water vapor than saturated air at 0°C.
A) 5; more
B) 20; more
C) 5; less
D) 20; less
More developed countries (MDCs) have high gross domestic products (GDPs) and high energy uses
a. True b. False Indicate whether the statement is true or false
The hydrogen bonding in water creates ________, a cohesive force that enables one to slightly overfill a glass with water or allows denser objects, such as a lengthwise steel needle, to float on water
A) surface tension B) capillary action C) friction D) heat exchange
Which of the following statements best describes how this object may have formed?
A. A star ejected its outer envelope of gas and plasma. B. Interstellar gas and dust accumulated due to gravity. Some pockets had enough mass to cause star formation. C. A supernova exploded, probably from the late-stage evolution of a high-mass star. D. Material accumulated into a sphere because of gravity, and it underwent nuclear fusion of hydrogen.