The theory of evolution was proposed by Darwin.
Condensation is the change in state of matter from gas to liquid.
Propane torch is lit inside a hot air balloon during pre-flight preparation because the heat from the touch is needed to heat the cold air inside the balloon, so that the air will expand and become less dense and rise, thus providing a lift for the balloon. This is line with charle's law, which states that, the volume of a fixed mass of ideal gas is directly proportional to the absolute temperature. This law implies that, as the temperature of the air inside the balloon increase, the volume of the balloon also increases.
Answer: A. It can identify the elements in the sample.
Explanation: on edge
There are 1000 meters in 1 Kilometer.
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