Which of the following statements BEST describes the process by which we have come to understand the age of the universe?
a. Scientists have worked independently to test and answer unique questions using only their own data.
b. Scientists have identified a single way to measure the age of the universe.
c. The age of the universe cannot be known through scientific means.
d. Over time, newer studies have built upon, revised, and improved our understanding of the age of the universe.
Answer is c. The age of the universe cannot be known through scientific means.
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Which of the following describes when the maximum daytime surface temperature typically occurs?
A. before the Earth receives its most intense solar radiation B. after the Earth receives its most intense solar radiation C. concomitantly with when the most intense solar radiation is received D. exactly when the Earth receives its most intense solar radiation
Where have the oldest dated sand grains been found on Earth?
A) Australia B) Canada C) The United States D) Africa
In the world today, there are many more extinct volcanoes than dormant and active ones. Indicate whether the statement is true or false
The effect of aerosols can be best described as ____
a. absorbing carbon dioxide b. emitting carbon dioxide c. reflecting sunlight and cooling the atmosphere d. absorbing sunlight and warming the atmosphere e. contributing to the formation of clouds