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Water Test

QuestionAnswer
What is a water molecule made up of? Two hydrogen atoms and one oxygen atom.
Why don't water drops break apart easily? Water molecules are attracted to each other.
Why do two water drops easily combine into one when they are brought near each other? Water molecules are attracted to each other.
Why does a drop of food coloring spread throughout water without stirring? Water molecules are in motion and cause the food coloring to spread. The food coloring molecules are also in motion.
What happens to water molecules when a sample of water is heated? The water molecules begin to move faster and spread further apart.
solid *Certain shape and size (volume) *Molecules arranged close together, usually in a pattern *Molecules vibrate while staying in position *Motion is slowest of all three states
liquid *Takes the shape of its container *Certain size (volume) *Molecules are close together, but randomly arranged *Molecules move faster than in a solid and slide past each other
gas *Takes the shape and size (volume) of its container *Molecules are spread apart (random) *Molecules move the fastest of all three states
humidity The amount of water vapor in the air. Air that contains a lot of vapor can feel damp. Your skin may also feel sticky and wet because of the amount of water vapor.
water vapor Water in the form of a gas.
evaporation The change of state from a liquid to a gas. Evaporation occurs when heat is added and molecules begin to move faster and spread apart.
condensation The change of state from a gas to a liquid. Condensation occurs when heat is removed and molecules begin to slow down and move closer together.
melting The change of state from a solid to a liquid. Melting occurs when heat is added and molecules begin to move faster and spread apart.
freezing The change of state from a liquid to a solid. Freezing occurs when heat is removed and molecules begin to slow down and move closer together.
Created by: mrsfrade