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Answers
Answer: Question 1:
A) Chemical change
B) Burning of metal
C) Chemical change
Question 2:
A) freezes
B) irreversible
Question 3:
1) (a) mixing of salt in water is a change that can be reversed by heating and melting of salt.
(b) mixing of salt in water is a change that cannot be reversed.
2) Conversion of ice into water and water into ice.
Question 4:
Periodic Changes.
Non-periodic Changes.
Reversible Change.
Irreversible Change.
Temperature.
Question 5:
A physical change is a temporary and reversible change in which the physical properties of the substance changes without altering the composition of the substance.
A chemical change is a permanent, not easily reversible change in which the identity of the substance is altered to produce one or more new substances.
Explanation:
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Answer:
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