# data[].attributes.body
Ice is less dense than water

# data[].attributes.headline
Defined as the amount of mass in a unit of volume of a substance

# data[].attributes.subject
Defined as the amount of mass in a unit of volume of a substance

# data[].attributes.headline
Nonzero integers always count as sig.digs. 

# data[].attributes.subject
Nonzero integers always count as sig.digs. 

# data[].attributes.body
All zeros between non-zero digits are significant (captive zero)

Leading zeros are NEVER sig.

Trailing zeros are only sig. if there is a decimal.

# data[].attributes.body
Multiplying & dividing: least # of sig. digs.

Adding & subtracting: least # past decimal.

# data[].attributes.body
Precision is a measure of how closely individual measurements agree with one another

Accuracy is how closely individual measurements agree with the correct / true value.

# data[].attributes.body
An exact number cannot be altered by human or experimental error (i.e. counting smiley faces)

An inexact number can be altered or made incorrect due to human or machine error (i.e. measuring liters to quarts)

# data[].attributes.body
Physical properties can be observed without changing the identity and composition of the substance (i.e. color, taste, luster, density)

Chemical properties describe the way a substance may change or react to form other substances. (i.e. flammability, color change, gas production)

# data[].attributes.body
Average atomic mass formula: (mass of isotope 1 X abundance in decimal form) + (mass of isotope 2 X abundance in decimal form) + (mass of isotope 3 X...

# data[].attributes.body
-ite --> -ous

-ate --> -ick

# data[].attributes.headline
I mol = 6.02 x10^23 molecules / atoms / particles

# data[].attributes.subject
I mol = 6.02 x10^23 molecules / atoms / particles