Archimedes Principle Why do we weigh less in water?
Newton's Third Law of Motion Why does a swimmer push the water backward?
Convex Mirror Why is a convex mirror used as a rearview mirror?
Heat Why do woolen clothes keep us warm?
Atmospheric Refraction Why do stars seem higher than they actually are?
Gravitational Force Why do you weigh less on the moon?
Pressure Why is it difficult to cut with a blunt knife?
Density Why do firemen crawl in smoke filled rooms?
Ultrasound Why is ultrasound used in sonar?
Refraction of Light Why does a pencil look bent in water?