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Physical and Chemical Changes
Matter and Energy
INSTRUCTIONS:
Use the words in the box below to fill in the blanks based on what you have
learned about physical and chemical changes. Words may be used more than once or not used at all.
Word Bank
chemical
physical
size
freezing
broken
transformed digestive
combined
digestion
stomach
nutrients
melting
saliva
enzymes
separated
new
CLOZE 1
A(n) _________________ change is any change in shape, _________________,
_________________ or phase of matter of a substance. However, _________________
_________________ substances are not produced or formed during a physical change. An
example of a phase change would be the _________________ of water into ice. A(n)
_________________ change is a type of change where one substance is
_________________ into a different substance.
Physical and chemical changes in matter occur very frequently in the _________________
system. The entire purpose of eating food is so that it can be
down and transformed into
_________________ that can be used by the body. An example of a physical change during
_________________ is when teeth are crushing and cutting food into smaller pieces. Another
example of a physical change during_________________ would be when food is in the
_________________ and it is being churned and processed through the body. An example of a
chemical change during digestion includes large molecules of food being broken down into
smaller molecules by _________________ , which are proteins that are found in the
_________________ of the mouth, in the stomach, and in the small intestine.
1