SCIENCE
EARTH SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cold
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cool
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warm
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hot
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Detailed explanation-1: -air has mass and density, and. cold air is denser than warm air.
Detailed explanation-2: -(a) Correct. Water is heavier than air because it is DENSER. This means that more water molecules are packed into a given volume.
Detailed explanation-3: -Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. Hot water is less dense and will float on room-temperature water. Cold water is more dense and will sink in room-temperature water.
Detailed explanation-4: -At IUPAC standard temperature and pressure (0 °C and 100 kPa), dry air has a density of approximately 1.2754 kg/m3.
Detailed explanation-5: -When water is cooled, the water molecules move slower and get closer together. This makes cold water more dense than room temperature water. Since cold water is more dense, it sinks in the room temperature water. When water is heated, the water molecules move faster and spread out more.