Class 4Environmental StudiesEar to Ear
How We Hear
Sound is a vibration that travels through air to our ears. The ear has: Outer ear (pinna) โ collects sound, like a funnel. Ear canal โ channels sound inward. Eardrum โ vibrates when sound hits it. Ossicles (3 tiny bones: malleus, incus, stapes) โ amplify vibrations. Cochlea (snail-shaped) โ converts vibrations to nerve signals. Auditory nerve โ sends signals to brain, which interprets them as sound.
10 examples
Concept check 1
For Class 4 Environmental Studies, explain or solve a how we hear question from the chapter "Ear to Ear". Focus on concept check and show the working clearly.
Definition to application 2
For Class 4 Environmental Studies, explain or solve a how we hear question from the chapter "Ear to Ear". Focus on definition to application and show the working clearly.
Formula warm-up 3
For Class 4 Environmental Studies, explain or solve a how we hear question from the chapter "Ear to Ear". Focus on formula warm-up and show the working clearly.
Reasoning practice 4
For Class 4 Environmental Studies, explain or solve a how we hear question from the chapter "Ear to Ear". Focus on reasoning practice and show the working clearly.
Board-style short answer 5
For Class 4 Environmental Studies, explain or solve a how we hear question from the chapter "Ear to Ear". Focus on board-style short answer and show the working clearly.
Mistake correction 6
For Class 4 Environmental Studies, explain or solve a how we hear question from the chapter "Ear to Ear". Focus on mistake correction and show the working clearly.
Visual interpretation 7
For Class 4 Environmental Studies, explain or solve a how we hear question from the chapter "Ear to Ear". Focus on visual interpretation and show the working clearly.
Applied word problem 8
For Class 4 Environmental Studies, explain or solve a how we hear question from the chapter "Ear to Ear". Focus on applied word problem and show the working clearly.
Revision challenge 9
For Class 4 Environmental Studies, explain or solve a how we hear question from the chapter "Ear to Ear". Focus on revision challenge and show the working clearly.
Exam recap 10
For Class 4 Environmental Studies, explain or solve a how we hear question from the chapter "Ear to Ear". Focus on exam recap and show the working clearly.