Directions: Read the paragraph and identify the correct words that fit in the
given sentences in the box below.

constant
completely
solid
heterogeneous
Boiling point
different
distilled water
homogeneous
melting
pure substance
Melting point
liquid
mixture
Pure substances are (1)____
in appearance. During boiling, the
temperature of a (2)____
changes at the start then it becomes (3)_____
During melting, a substance melts (4)._____
within a short time.
To determine a (5)_____
sample if it is a pure substance, you should test
it using its boiling point; while if it is a (6)._____
sample, its melting point is the
best way to test.
In Enrichment A, the liquid A is (7)_____
since it has a fixed boiling point
while the water with salt is a mixture because it has a varying melting point.
What I Can Do​