Question

physical and chemical changes
complete the paragraph using words from the word bank.
word bank
appearance changes chemical cutting original physical transforms vinegar
__________ in matter can be grouped into two types:
physical changes and __________ changes. physical changes
involve changes in the __________ or form of a substance
without it becoming a different substance. examples include
__________ a piece of paper or bending a pipe cleaner. in
contrast, chemical changes occur when a substance
__________ into something new. mixing baking soda and
__________ to create bubbles is an example of a chemical
__________. other examples include rusting metal, burning wood, or
baking a cake. clues to differentiate between __________
and chemical changes include color changes, the production of
bubbles, heat, or light. in addition, the inability to revert the
substance back to its __________ form suggests a chemical
change.

Explanation:

The paragraph is about classifying changes in matter. The first blank needs a plural noun related to changes. "Changes" fits. The second blank is a type of change opposite to physical, so "chemical". Physical changes involve "appearance" (like cutting paper). "Cutting" is an example. When a substance "transforms" (chemical change). Mixing baking soda and "vinegar" (a common chemical reaction). The last blanks: differentiate between "physical" and chemical. Can't revert to "original" (chemical change property).

Answer:

1. Changes
2. chemical
3. appearance
4. cutting
5. transforms
6. vinegar
7. physical
8. original