Page 33 - oxford_discover_2_student_book_Neat 2 1
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Things can change from one state to another
when we make them hot or cold.
When we make water When ice or snow When we heat
very cold, it freezes heats up, it melts and water, it boils and
and changes to ice. changes back to water. changes to steam.
Look at these three pictures of things changing
from one state to another.
The snow was a
solid and now
it's a liquid.
Think"
What’s the cause of
the snow melting?
What’s the effect?
The water was a
liquid and now The water was
it's a solid. a liquid and
now it's a gas.
T h in k T h in k
What’s the cause of What’s the cause of
the w ater freezing? the w ater boiling?
What’s the effect? What’s the effect?
