Evaporation, Condensation & a Wet Cold Cup — Drills · Grade 8 Science
Chapter: Phases of MatterWhat these drills covers
By the end of Evaporation, Condensation & a Wet Cold Cup you should be able to:
- I can account for water during evaporation and condensation using a boundary and a particle model.
- I can use a supplied dew point and plan a comparison that separates influential conditions.
4 questions, written answer, each with a worked explanation.
Vocabulary used: evaporation, condensation, water vapor, humidity, dew point, model, evidence, system boundary, assumption.
Problem 1
Answer and explanation
It helps test the role of cooling while keeping the cup construction similar. Clear outside water on the cold cup supports an air-water source rather than a colored leak.
It helps test the role of cooling while keeping the cup construction similar. Clear outside water on the cold cup supports an air-water source rather than a colored leak.
Response criteria
- Use the supplied conditions and relevant evidence.
- Explain the scientific mechanism or calculation.
- State a meaningful limitation or testable next step.
Problem 2
Answer and explanation
No. Surface evaporation occurs below boiling. Water transfers from the cloth into the air, rather than vanish.
No. Surface evaporation occurs below boiling. Water transfers from the cloth into the air, rather than vanish.
Response criteria
- Use the supplied conditions and relevant evidence.
- Explain the scientific mechanism or calculation.
- State a meaningful limitation or testable next step.
Problem 3
Answer and explanation
The 8 °C surface is below the supplied 12 °C dew point; the 18 °C surface is above it. The prediction depends on those air conditions.
The 8 °C surface is below the supplied 12 °C dew point; the 18 °C surface is above it. The prediction depends on those air conditions.
Response criteria
- Use the supplied conditions and relevant evidence.
- Explain the scientific mechanism or calculation.
- State a meaningful limitation or testable next step.
Problem 4
Answer and explanation
Area, illumination and possibly temperature differ. A comparison changing only intended area is needed to isolate its effect.
Area, illumination and possibly temperature differ. A comparison changing only intended area is needed to isolate its effect.
Response criteria
- Use the supplied conditions and relevant evidence.
- Explain the scientific mechanism or calculation.
- State a meaningful limitation or testable next step.