|•Which among the following samples are pure substance? Explain your answer according to their properties such as homogeneity, kind of matter, composition, boiling and melting points.


1. sugar in a sugar bowl
________________________________________________________________

2. soil
________________________________________________________________

3. coffee with milk and sugar
________________________________________________________________

4. copper in copper wire
________________________________________________________________

5. a chocolate chip cookie
________________________________________________________________


||• Design a procedure that will help identify which of the given samples below are the substance.

materials: rubbing alcohol, vinegar, gold earrings, and a tin can

Procedure:
1._______________________________________________________________

2._______________________________________________________________

3. ______________________________________________________________

4._______________________________________________________________

5._______________________________________________________________

|||•Look for the words in the box that is associated with pure substances to complete the statements below.

(words in the box:)
•physically combined
•physically separated
•chemically combined
•one phase/kind
•melting point
•elements
•chemically separated
•definite composition
•homogeneous
•boiling point
•compound
•matter


Pure substances are always 1._________ which has one 2._______only. It is also made up of only kind of 3.__________. Pure substances have definite 4._______________, 5._____________ and 6.____________.
There are two kinds of pure substances 7._____________ and 8.___________________.


paki sagot po Ng tama (╥﹏╥) please!! ​