8th Grade SOL Review - Unit 1-6

Use a balance / scale to measure it

Use a graduated cylinder to measure it

Use a spring scale to measure it

Measured in Grams (g) or (kg)

Measured in Liters (mL) or (L)

Measured in Newtons (N)

A change that does not alter the identity

Observation with your senses

New compounds are formed

A reaction that results in a new substance

Blue, round, and rough

The acid and base reacted to form salt

pH level, conductivity, and flammability

Ripping a paper, melting ice cream, and dissolving salt in water

Describes how the object will react

Close together

Far apart

Slow / vibrate in place

Fast atoms

medium speed

medium distance

particles slide past one another

definite shape and volume

Liquid turning into a solid

Liquid turning into a gas

Solid turning into a liquid

Electrons do NOT travel along defined paths. Electrons travel randomly in the cloud.

Protons are NOT found in the nucleus of the atom. Instead they are in the orbit.

Describes observed pattern / mathematics

An explanation of why or how

Testable prediction

Smaller than a proton

0 amu (mass)

The same size as a proton

1 amu (mass) just like the neutron

Found in the cloud / outside of the nucleus

Negatively charged

Positively charged

Found in the Nucleus with protons

Found in the Nucleus with Neutrons

With protons, make up the mass of the atom

Neutrally charged

Hydrogen (H)

Saltwater H₂O AND NaCl mixed and separated by boiling

Physically combine and separate

Water (H₂O)

2 or more elements or compounds physically MIXED together

One type of atom

Chemically combine and separate through a chemical reaction

2 or more types of atoms BONDED together