Question

FOCUS
ACTIVITY SHEETS
SCIENCE
CLASS 7 TERM 2
1
Chapter 3
CHANGES AROUND US
I. Analogy:
1. Physical change :
:: Chemical change : burning incense stick
: chemical change
2. Sawing a piece of wood : physical change ::
3. Exothermic process: condensation :: Endothermic :
4. Cow dung to biogas:
:: Melting of wax : reversible change
5. Physical change : change of state :: Chemical change : change of​

Answer 1

Answer:

When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.