Question

Take two identical cans with lids, paint one black and the other white. Fill the same
quantity of water in both cans. Make a hole at the centre of each led and cover the
cans with the lids. Insert a thermometer through the hole in each lids. Leave the
cans in the sun for an hour or two and note the temperature of the water in each
can.
Write any of the changes that heat causes in substances.
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Answer 1

Water is Hotter in Black painted can compared to white painted can.

Step-by-step explanation:

Taken two identical cans with lids, paint one black and the other white.

Filled both with same  quantity of water in both cans.

Made a Hole at the centre of each lid and placed thermometer through hole.

Leave the  cans in the sun for  2 hours

Noted down temperature

Observation : Temperature of water in Can painted Black is more than the water in can painted white

Reason : Black absorbs Sunlight

White reflect sun light

As Black absorb all sun light hence temperature is increased more

While white reflect sun light hence temperature increase in less

Water is Hotter in Black painted can

This is also the reason that in summer people prefer wearing white colour shirt and avoid black colour

Learn More:

In which can water is hotter and why

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