Chemical Change or Physical Change?

Question

A. Cracking an Egg

B. Using bleach to remove a stain from a shirt.

C. Burning a Candle.

D. Melting butter in the sun.

Answer 1

A: Physical - you are physically cracking the egg

B: Chemical - The beach reacts with the stain to either hide it or help it be removed

C: Chemical - the wax chemically combines with the Oxygen in air to produce heat and light

D: Physical - the butter goes from solid to liquid but is not changed chemically

A: generally volume over time ie litres per hour. Note sometimes other units are used eg Sverdrup which is kilolitres per second per square kilometre (used for measuring ocean currents)

B: distance over time ie kilometres per hour

C: volume: Generally cubic metres although sometimes referred to as litres 1 cubic meter = 1000 kilolitres or 1000 litres

Answer 2

physical

physical

chemical

chemical

rate=power,flow=force

m/s(metrepersecond)

(centimetrecube)

cm^3