Estimate the answer by rounding the percent to the nearest ten and the second number to the nearest thousand. 20% of 9172

What is the result of the greenhouse effect? a. heat is deflected from the atmosphere. b. heat is released from the atmosphere. c. heat is kept in the atmosphere. d. plants are able to grow in the tropics where the air is the heaviest.

How can minerals crystallize from materials dissolved in water? check all that apply.

Scientists believe that differences in cause hot, plastic-like rock in the asthenosphere to rise toward earth's surface. a. density c. weight b. magnetism d. composition c. conduction. d. density.