Water boiling on a stove is a
When an old penny, lost in the grass, and turns green it is a
Fireworks exploding in the night sky is a
Frost forming on a pumpkin is a .
When an old Jack-O-lantern begins to rot it is a
Chemical changes happen only in things that are alive.
Physical changes happen only in things that are not alive.
The way atoms are fastened together changes during a chemical
change.
Atoms and molecules are both particles.
If a material changes color, it is proof that a chemical change is
happening.
Which is the best sign that a chemical change is happening?
Identify all of the chemical changes below.
What kind of change or changes are happening when water goes over a
waterfall?
Use the words “atoms” and “molecules” to explain what happens when a
new material is formed during a chemical change.
Describe a change you could see that could be either a chemical change
or a physical change. Be sure to explain how the change could fit into both categories.