Acids
Acids taste
sour
Bases feel
slippery
Protons are ________ charges
positively
The water molecule has _____ hydrogen atoms and ____ oxygen atoms
2 hydrogen and 1 oxygen
Less dense thing float in water while more dense things
sink
Our stomachs are very
acidic
Our blood is
basic
Electron are _________ charges
Negatively
When the amount of acid is added to the same amount of base we call this
neutralization
When air is heated it
expands (gets bigger).
An example of an acid in food is . . .
vinegar, . . . citric acids (citric fruits)
An example of a base in everyday life is
cleaning supplies (soaps).
Neutrons are _______ charged
neutral
Pure water has a ph level of
7
If an object is cut in half, its density
remains the same.
We measure acidity on a
Bases taste
bitter
Giving up lots of protons makes a substance a
strong acid
The density of liquid water is
1 (g/cm3)
Objects with a density of greater than one will
sink
A substance with a ph level of 2 is said to be ____
a strong acid
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Accepting a lot of protons makes a substance a
strong base
Ice floats because
when water freezes it expands (molecules spread out)
If an object is 50% below the waterline, its density is
.50 (g/cm3)