Freezing and Melting of Water
PROBLEM: Will a decrease in heat energy cause water to freeze or melt?
BACKGROUND
• Freezing temperature of water is:
32 F or 0 Celsius
• Melting temperature of ice is:
32 F or 0 Celsius
• Explain how the freezing & melting temperatures of water are related.
They are both same temperatures because water can be all the states of matter
• What are the states of matter?
Solids, liquids, gas
• Explain what causes substances to change from one state of matter to the next.
The temperature that the object is in can affect the substance and make it change
• What happens during the freezing process?
The process when a liquid becomes a solid and the molecules contract/tighten
• What happens during the melting process?
The process when a solid becomes a liquid and the molecules expand
• What is meant by the term “lower state of matter”?
A solid
• What is meant by the term “higher state of matter”?
Plasma
BIBLIOGRAPHY:
Dictionary.com | Find the Meanings and Definitions of Words at Dictionary.com.
Web. 01 Oct. 2010. <http://dictionary.reference.com/>.
Trefil, James S., Rita Ann. Calvo, and Kenneth Cutler. McDougal Littell Physical
Science. Evanston, IL: McDougal Littell, 2006. Print
Define the following terms:
Physical Properties- any property used to characterize matter and energy and their interactions
Freezing- the process by which a substance changes from a liquid to a solid
Freezing point- the temperature where a specific liquid becomes a solid
Melting- the process by which a solid becomes a liquid
Melting Point- the lowest temperature when a substance melts
HYPOTHESIS- If the heat energy in the water decreases, then the water will freeze.
Independent variable- heat energy
Dependent variable- water
DATA & OBSERVATIONS
