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Grade 7 Science: Substances, Mixtures & Chemical Reactions Intro
Name
Date
1.
A ___ has fixed composition; element or compound.
2.
A ___ combines two or more substances not chemically bonded.
3.
___ mixtures look the same throughout.
4.
___ mixtures have visible different parts.
5.
A ___ reaction forms new substances with new properties.
6.
___ are starting materials in a reaction.
7.
___ are new substances formed.
8.
Evidence of chemical reaction: color change, gas, temperature change, ___.
9.
Substance vs mixture?
10.
What is a chemical reaction?
11.
Give three evidences of chemical reaction.
12.
What is conservation of mass?
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