Problem Analysis:
The task involves completing a worksheet about "Matter Changing State." The worksheet includes a diagram of the states of matter (solid, liquid, gas) and their transitions, along with several fill-in-the-blank questions. The goal is to understand how matter changes state and complete the blanks using appropriate scientific terms.
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Solution:
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1. Diagram Analysis:
The diagram shows the three states of matter (solid, liquid, gas) and the processes by which they change from one state to another:
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Solid → Liquid: Melting
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Liquid → Solid: Freezing
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Liquid → Gas: Evaporation
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Gas → Liquid: Condensation
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Solid → Gas: Sublimation
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Gas → Solid: Deposition
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2. Completing the Worksheet:
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Question 1:
"The type of evaporation that takes place below the surface of a liquid is called ______."
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Answer:
Evaporation
- Explanation: Evaporation occurs when particles at the surface of a liquid gain enough energy to escape into the gas phase. This process can also occur below the surface, but it is still referred to as evaporation.
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Question 2:
"A cloud of solid vapor is called a ______."
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Answer:
Fog
- Explanation: A cloud of solid vapor is typically referred to as fog. Fog forms when water vapor in the air condenses into tiny droplets, creating a visible mist or cloud.
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Question 3:
"The melting point of a substance is also the same as the ______ of freezing."
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Answer:
Freezing Point
- Explanation: The melting point of a substance is the temperature at which it changes from a solid to a liquid. The freezing point is the temperature at which a liquid becomes a solid. These two temperatures are the same for a given substance.
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Question 4:
"When matter changes from a gas to a liquid, it is called ______."
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Answer:
Condensation
- Explanation: Condensation is the process by which a gas changes into a liquid. This occurs when gas particles lose energy and come together to form liquid droplets.
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Question 5:
"The result of melting is a ______."
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Answer:
Liquid
- Explanation: Melting is the process by which a solid changes into a liquid. Therefore, the result of melting is a liquid.
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Question 6:
"Crystals dissolve when a solid becomes a ______."
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Answer:
Solution
- Explanation: When a solid dissolves in a solvent (like water), it forms a solution. Crystals dissolve when their particles separate and mix with the solvent.
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Question 7:
"Gas turns liquid when enough energy is removed to cause ______."
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Answer:
Condensation
- Explanation: When energy is removed from a gas, its particles lose kinetic energy and come together to form a liquid. This process is called condensation.
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Question 8:
"The opposite of sublimation is called ______."
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Answer:
Deposition
- Explanation: Sublimation is the process by which a solid directly changes into a gas. The reverse process, where a gas directly changes into a solid, is called deposition.
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Final Answers:
1.
Evaporation
2.
Fog
3.
Freezing Point
4.
Condensation
5.
Liquid
6.
Solution
7.
Condensation
8.
Deposition
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Final Answer Box:
\[
\boxed{\text{Evaporation, Fog, Freezing Point, Condensation, Liquid, Solution, Condensation, Deposition}}
\]
Parent Tip: Review the logic above to help your child master the concept of state of matter worksheet middle school.
