Pure substance are 1.______in appearances. during boiling, the temperature of a _______ changes at the start then it becomes 3. ______. during melting a substances 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 meaning point is the best way to test
in enrichment A, the liquid a is 7. __________ since it has fixed boiling point
THE CHOICES
constant
completely
solid
heterogeneous
boiling point
diffenrent
distilled water
homogeneous
melting
pure substances
melting point
liquid
mixture