Write two examples for each of the following.
1. Rough materials.
2. Unicellular organisms
3. Reversible changes.
4. Scavengers
5. Rectilinear motion.
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rough material-cement sand paper
unicellular organisms - bacteria and protozoa
reversible changes - melting of candel and freezing of ice and then melting.
scarvangers- raccoon and coyote
rectilinear motion - The use of elevators in public places is an example of rectilinear motion.
Gravitational forces acting on objects resulting in free fall is an example of rectilinear motion
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