Vocabulary
All matter is made up of these: there are 118 currently and Oxygen is an example.
Elements
Na
Element or compound?
Element
Unexpected color change
C6H12O6
How many Carbon atoms?
6
Solid steel melting in intense heat.
Physical
The smallest building block of all matter is:
an atom
CO
Element or Compound
Compound
What evidence is there that boiling water on the stove is NOT a chemical change?
Water turns into water vapor, no new substance formed.
C6H12O6
How many total atoms?
24
What's that smell? Mmmm cookies in the oven!
Chemical
When a substance physical appearance changes, but it is still the same substance.
Physical Change
Identify the elements in this compound.
CaCO3
Calcium, Carbon, Oxygen
What evidence is there that NaOH is a compound?
More than 2 different atoms chemically combined.
Li2(PO4)3 + H2O
How many different elements?
4
Orange food coloring is added to water, turning it orange. No it didn't become an orange, it's the color orange.
Orange, I mean physical
Something that shows the amount and identity of the elements present in a compound. H2O is an example
Chemical formula
A pure substance made of 2 or more different elements.
Compound
What evidence is there that uncoiling a spring is a physical change?
No new substance formed. It is reversible.
Ca(NO3)2
How many Oxygen atoms?
6
Enzymes from the pancreas are released into the small intestine and break down food into simple molecules.
Chemical
Elements are represented on the periodic table as elemental ________. Po is an example.
Symbols
When CO2 and water react to make glucose, this has occurred.
Sugar is melted in a pan and it starts to turn brown. What kind of change is this and provide evidence to support.
Chemical change, Change in color is evidence.
Ca(NO3)2
How many atoms that are nonmetals?
8
Muscular contractions in the stomach mix and crush food.
Physical