Class 7ScienceHeat
Radiation
Heat transfer without any medium (works in vacuum). Energy travels as infrared waves (electromagnetic radiation). Sun heats Earth through radiation across empty space. Dark/dull surfaces absorb more radiation. Shiny/light surfaces reflect more. That's why we wear light clothes in summer and dark in winter. Thermocol and wool trap air โ excellent insulators (no convection).
10 examples
Concept check 1
For Class 7 Science, explain or solve a radiation question from the chapter "Heat". Focus on concept check and show the working clearly.
Definition to application 2
For Class 7 Science, explain or solve a radiation question from the chapter "Heat". Focus on definition to application and show the working clearly.
Formula warm-up 3
For Class 7 Science, explain or solve a radiation question from the chapter "Heat". Focus on formula warm-up and show the working clearly.
Reasoning practice 4
For Class 7 Science, explain or solve a radiation question from the chapter "Heat". Focus on reasoning practice and show the working clearly.
Board-style short answer 5
For Class 7 Science, explain or solve a radiation question from the chapter "Heat". Focus on board-style short answer and show the working clearly.
Mistake correction 6
For Class 7 Science, explain or solve a radiation question from the chapter "Heat". Focus on mistake correction and show the working clearly.
Visual interpretation 7
For Class 7 Science, explain or solve a radiation question from the chapter "Heat". Focus on visual interpretation and show the working clearly.
Applied word problem 8
For Class 7 Science, explain or solve a radiation question from the chapter "Heat". Focus on applied word problem and show the working clearly.
Revision challenge 9
For Class 7 Science, explain or solve a radiation question from the chapter "Heat". Focus on revision challenge and show the working clearly.
Exam recap 10
For Class 7 Science, explain or solve a radiation question from the chapter "Heat". Focus on exam recap and show the working clearly.