Let's solve the worksheet step by step and explain each answer.
---
Image Description:
The image shows two scenes:
-
Left: Clothes are spread out on a clothesline.
-
Right: Clothes are folded on the same type of line.
This visual comparison is used to illustrate how surface area affects evaporation.
---
Question 1:
"Wet clothes dry more quickly when they are ____________."
✔ Answer: *spread out*
🔹
Explanation: When clothes are spread out, more of the wet surface is exposed to air, allowing water to evaporate faster. Folding them reduces the exposed surface area, slowing down drying.
---
Question 2:
"A ____________ surface area helps to ____________ the rate of evaporation."
✔ Answer: *larger*, *increase*
🔹
Explanation: A larger surface area allows more water molecules to be exposed to the air, increasing the rate of evaporation. This is why spreading clothes out dries them faster.
---
Evaporation:
####
(a) It is the change of a _________ into a _________ at any temperature.
✔ Answer: *liquid*, *gas*
🔹
Explanation: Evaporation is the process where a liquid turns into a gas (vapor) at temperatures below its boiling point. For example, water on clothes turns into water vapor in the air.
---
####
(b) The rate of evaporation depends on the ____________, ____________, and ____________.
✔ Answer: *temperature of surroundings*, *presence of wind*, *the surface area*
🔹
Explanation:
-
Temperature of surroundings: Higher temperature increases kinetic energy of molecules, leading to faster evaporation.
-
Presence of wind: Wind carries away water vapor from the surface, allowing fresh air to come in and speed up evaporation.
-
Surface area: Larger surface area exposes more liquid to air, increasing evaporation rate.
---
✔ Final Answers:
1. Wet clothes dry more quickly when they are
spread out.
2. A
larger surface area helps to
increase the rate of evaporation.
Evaporation:
(a) It is the change of a
liquid into a
gas at any temperature.
(b) The rate of evaporation depends on the
temperature of surroundings,
presence of wind, and
the surface area.
---
✔ All answers match the provided word bank:
- presence of wind
- gas
- the surface area
- liquid
- temperature of surroundings
This worksheet teaches the concept of evaporation and factors affecting it using a real-life example — drying clothes.
Parent Tip: Review the logic above to help your child master the concept of evaporation worksheet.
