Lesson 2: Observing Properties
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What might be in the water that could have killed the animals? What can we observe about each of those dangerous materials?
Certain properties of matter can be directly observed. Mixing materials with water allows additional properties to be measured. Properties are any traits of a material that can be measured. Directly observable properties include state of matter, grain size, and color, among others. When matter is mixed together, mass is conserved even when matter seems to vanish.
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