Changes and what allows an atom to change?

Which of the following is a example of physical change ?

• burning of wood

• photosynthesis

• melting of ice-cream

• ripening of fruit

What does the picture represent ?

• physical change

• chemical change

Observe the picture and choose the correct option.

• Irreversible physical change

• Reversible physical change

Choose the picture that shows chemical change.

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In physical change , the substance formed has different properties than the original substance.

• True

• False

A chemical change may involve

• Evolution of gas

• Change in temperature

• Change in colour

• All of the above

When a candle burns, both physical and chemical changes occurs.

• True

• False

Which of the following is an example of a physical change?

• a bike rusting

• toast burning

• butter melting

• food spoiling

Which of the following is an example of a chemical change?

• a penny tarnishing

• a mirror being scratched

• hair being cut

• water being boiled

Which of the following examples provides evidence of a PHYSICAL change?

• Wood is burned and releases ash and smoke

• Iron rusts over time

• When mixed, baking soda and vinegar form gas bubbles

• Boiling water bubbles when heated