Science Homework
Do the following questions in science notebook
Q1 Identify the following changes as physical or chemical
a. Dissolving sugar in water.
b. Formation of rain from cloud.
c. Formation of acid rain.
d. Burning of candle.
e. Hammering a nail flat
Q2 What are physical properties? Give examples.
Q3 What are physical changes? Give examples.
Q4 What are chemical changes? Give examples.
Q5 Explain how burning of a magnesium ribbon is a chemical change?
Q6 What are the indications of a chemical change?
Answers
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1
Answer:
a physical
b physical
c chemical
d chemical
e physical
Q3 physical change means the change that can be reversed. eg melting ice, boiling water etc.
Q 4 chemical change means the change that cannot be changed or reversed. eg burning , formation of food etc
Q 5 once magnesium ribbon is burned it changes into ash and cannot to turned back into ribbon so it is a chemical change.
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