8th Grade SOL Review - Unit 1-6

Measured in Newtons (N)

Measured in Liters (mL) or (L)

Use a balance / scale to measure it

Measured in Grams (g) or (kg)

Use a graduated cylinder to measure it

Use a spring scale to measure it

The acid and base reacted to form salt

Blue, round, and rough

A reaction that results in a new substance

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

Describes how the object will react

Observation with your senses

pH level, conductivity, and flammability

A change that does not alter the identity

New compounds are formed

particles slide past one another

definite shape and volume

Fast atoms

Far apart

Slow / vibrate in place

medium distance

Close together

medium speed

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.

An explanation of why or how

Describes observed pattern / mathematics

Testable prediction

Negatively charged

Neutrally charged

With protons, make up the mass of the atom

The same size as a proton

Found in the Nucleus with Neutrons

Smaller than a proton

1 amu (mass) just like the neutron

Positively charged

0 amu (mass)

Found in the cloud / outside of the nucleus

Found in the Nucleus with protons

Water (H₂O)

Chemically combine and separate through a chemical reaction

Physically combine and separate

2 or more elements or compounds physically MIXED together

Saltwater H₂O AND NaCl mixed and separated by boiling

One type of atom

2 or more types of atoms BONDED together

Hydrogen (H)