A student looks at a pencil in a glass of water. The pencil appears broken at the water surface.
Two identical bar magnets are placed on a table. When the north pole of magnet X is brought near magnet Y, magnet Y moves away. psle 2012 science questions and answers
A cheek cell and an onion cell are observed. A student looks at a pencil in a glass of water
(a) Evaporation. (b) Increase temperature / blow air over the surface. psle 2012 science questions and answers