Question

question 4
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anything that has mass or volume is called ______.
select one:
a. definite
b. mixtures
c. matter
d. homogeneous
question 5
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phase changes are classified as ______ changes.
select one:
a. heterogeneous
b. physical
c. observation
d. gas
question 6
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in the scientific method, ______ is the step in which experimental results are used to decide the validity of each hypothesis.
select one:
a. analysis
b. theory
c. physical
d. hypothesis

Explanation:

Question 4: Matter is defined as anything that has mass and occupies volume.
Question 5: Phase changes (like solid to liquid, liquid to gas) do not alter the chemical composition of a substance, so they are physical changes.
Question 6: In the scientific method, analysis is the step where experimental data is examined to evaluate if hypotheses are supported.

Answer:

Question 4: c. Matter
Question 5: b. Physical
Question 6: a. Analysis