Question

1st June 21

Std :7
Sub :Science
Students, some pictures and its names are given in the worksheet. Classify them in physical change and Chemical change. Make two columns in your notebook and write only names in respective column. No need to draw pictures.​

Answer 1

Chemical change:

lighting a match

mixing vinegar and baking soda

burning wood

digesting food

frying an egg

baking a cookie

a rusting bike

disolving sugar

Physical change:

cutting grass

freezing water

crushing a can

cutting an apple

melting ice

breaking a mirror

ripping paper

burning a candle is both physical and chemical change as it melts into wax(physical) , emits gasses while burning (chemical)