Question

matter and its changes
a. changes of matter

1. matter changes with the season, including changes in the

__________________ of leaves and in the __________________ of
the air.

1. matter can change in many ways, including ____________________ changes

and ____________________ changes.
b. what are physical changes?

1. in a physical change, the ____________________ of the substance does not

change.

1. ____________________ one substance in another does not change the

identities of the substances.

1. the formation of ice on the surface of a lake is an example of

a(n) ____________________

1. changes in state involve changes in the amount of ____________________ that

the particles in a substance have.

1. the ____________________ at which one state of

Explanation:

Part A

1.

Step1: Analyze the context of leaves' seasonal change.

Leaves change color with seasons (e.g., green in summer, yellow/orange in fall). For air, its temperature changes with seasons.

Step2: Fill in the blanks.

So the first blank is "color" and the second is "temperature".

2.

Step1: Recall types of matter changes.

Matter changes are mainly physical (no new substance) and chemical (new substance formed).

Step2: Fill in the blanks.

The blanks are "physical" and "chemical".

Part B

1.

Step1: Recall definition of physical change.

In physical change, the chemical identity (or composition) of the substance remains same.

Step2: Fill in the blank.

The blank is "chemical identity (or composition)".

2.

Answer:

s:
A.1. color; temperature
A.2. physical; chemical
B.1. chemical identity (or composition)
B.2. Dissolving (or Mixing)
B.3. physical change
B.4. thermal energy (or kinetic energy)
B.5. temperature (assuming context)