Across
- 3. In a chemical reaction, we begin with substances called ………………………..
- 5. A chemical reaction is a process in which one or more substances undergo a chemical change. The ………………. of these substances rearrange to form new substances with different chemical properties.
- 6. Word equation is a representation of a chemical reaction using the …………….. of the substances involved.
- 7. The atoms are rearranged, new bonds are formed, and new substances, called ………………………., are created.
Down
- 1. When these reactants undergo a chemical change, the chemical …………… within them are broken.
- 2. …………………… of chemical change include gas production, temperature change, solid (precipitate) formation and colour change. These are observable signs that a chemical reaction is taking place.
- 4. Chemical equation is a representation of a chemical reaction using symbols and ………………………… of the substances involved.