Which of the following is a chemical property of water?
A) Ice floats.
B) Water boils at 100°C.
C) Water reacts violently with sodium.
D) All of these are chemical properties.
C
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Conditionally unstable air becomes positively buoyant once it reaches the ________
Fill in the blank(s) with the appropriate word(s).
A lava flow is an example of an effusive volcanic eruption
Indicate whether the statement is true or false
The ____ _____ _______is one of Africa's most spectacular physical features, with broad steep walled trough extending from the Zambezi Valley northward to the Red Sea and the valley of the Jordan River
Fill in the blank(s) with correct word
The polar jet stream flows in the tropopause, near the polar front and follows a curved path in the form of long waves
a. True b. False Indicate whether the statement is true or false