Blow Hot Blow Cold
16 solved questions from Class 5 EVS, each with the full working. Tap any question to see the step-by-step solution.
- 1 What is the fundamental scientific concept introduced in the chapter 'Blow Hot Blow Cold'? medium MCQ Key Concept & Definition
- 2 Which of the following is an important application or observation related to 'Blow Hot Blow Cold'? easy MCQ Practical Application
- 3 What primary question does the chapter 'Blow Hot Blow Cold' aim to answer? medium MCQ Core Scientific Inquiry
- 4 Why is the study of 'Blow Hot Blow Cold' essential for students in class-5? hard MCQ Importance & Significance
- 5 Which key practice is recommended while studying topics in 'Blow Hot Blow Cold'? medium MCQ Scientific Method
- 6 What is the primary topic or theoretical principle explored in 'Blow Hot Blow Cold' (Class 5 EVS)? medium MCQ Chapter Core Principle
- 7 Which key mechanism or analytical rule is highlighted in 'Blow Hot Blow Cold'? medium MCQ Key Analytical Mechanism
- 8 Why does water get cooler when you pour it into a glass covered with a wet cloth and leave it in a shaded place? easy 1 mark Evaporation cooling effect
- 9 A puddle of water covering 0.04 m² area evaporates 0.5 mm of water in one day. How much water (in millilitres) has evaporated from the puddle in that day? medium 2 marks Evaporation calculation
- 10 Which of the following is the best way to keep a 1‑litre bottle of water cool while playing outside on a hot day? medium MCQ 2 marks Heat transfer by evaporation
- 11 A puddle covers an area of 1.5 m² and evaporates 4 mm of water in a day. How many litres of water have evaporated? easy MCQ 1 mark Evaporation volume calculation
- 12 A puddle of area 0.05 m² evaporates 0.8 mm of water in 24 hours. Calculate the mass of water evaporated in kilograms. Show all calculations. hard 4 marks Volume‑mass conversion in evaporation
- 13 Explain how condensation on a cold glass leads to water droplets forming on its surface. Why does this happen even though the glass feels cold? medium 2 marks Condensation and dew point
- 14 A puddle has an area of 0.02 m² and evaporates 2.5 mm of water in 12 hours. What is the mass of water evaporated in kilograms? hard 2 marks Mass of evaporated water calculation
- 15 Which of the following processes explains why water droplets form on the outside of a cold glass of water? easy MCQ 1 mark Condensation process
- 16 A puddle covers an area of 2 m² and evaporates 3 mm of water in one day. How many litres of water have evaporated? medium 2 marks Evaporation volume calculation