chem Flashcards
1
Q
Physical Changes
A
the arrangement, location, and
speed of particles that make up the
substance may change.
2
Q
ex p
A
- Crushing or cutting an object
3
Q
ex p
A
Changing the state (solid, liquid, or gas)
of a substance
4
Q
ex p
A
- Dissolving a solid in a liquid
5
Q
Chemical Changes :
A
are changes in which
the identities of substances change and
new substances are formed.
6
Q
ex c
A
- Iron rusting
7
Q
ex c
A
Wood burning into ash
7
Q
ex c
A
Baking a cake
8
Q
There are seven common signs or indicators
that a chemical change may be occurring.
A
- Release of heat
- Light is created
- Production of sound
- Gas bubbles are formed
- A new solid is created
- The reaction container gets hot or cools
down - The reaction changes in color or odor
9
Q
A
