Question

What you have learned in science 9

Answer 1

In biology: digestion, respiratory system, photosynthesis, excretory system, cell division, heredity, transpiration, pollution

In physics: work, force and power, machines, refraction, sound, calorimeter, radioactivity, current electricity, magnetism.

In chemistry: periodic laws, hcl, hno3, chemical bonding, acid rain, h2so4

Hope it helps you:)

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