8th Grade Final Exam Review 2023-2024

Flashcards for 8th grade final exam review covering topics like states of matter, simple machines, density, friction, chemical reactions, periodic table, and units of measurement.

Melting

Solid to a liquid

Freezing

Liquid to a solid

Condensation

Gas to a liquid

Sublimation

Solid directly to a gas

Mechanical advantage of simple machines

The number of times the machine increases the force put on it.

Inclined planes

Length divided by height

Pulleys

Number of ropes supporting the object minus the one it is attached to

Levers

Output force divided by input force

Wedge

Length divided by width

Parts of a lever

Input arm, output arm, fulcrum

1st Class Lever Example

See Sow, Scissors

2nd Class Lever Example

Wheel barrow, nut crackers, bottle openers

3rd Class Lever Example

Hockey stick, baseball bat, shovels

Another name for inclined plane

Ramp

Volume of a regular shaped object

l x w x h

Volume of an Irregular shaped object

Difference in water height

Density

d = m/v

Frame of reference

Something you use to see if an object is moving

Good frames of reference

A tree, A building, A sign.

Sliding Friction

2 objects slide over each other

Static Friction

Not moving

Rolling Friction

Has wheels, one object rolls over another

Catalyst

A material that increases the rate of reaction by lowering the activation energy.

Enzyme

A type of Protein that speeds up chemical reactions in living things.

Interpolated Data

Data that is given

Extrapolated Data

Extended data

Solid

Definite shape, definite volume

Liquid

No definite shape, definite volume

Gas

No definite shape, no definite volume

Evaporation

Liquid to a gas at the surface

Vaporization

Liquid to a gas - throughout the liquid

Inclined planes

Ramp, Screws, Spiral stair case

Spiral staircase example

Screw (inclined plane)

In order for work to be done

An object must be moved

Density units

g/cm³, kg/m³

Velocity units

m/s + direction

Mass units

g, Kg

Speed units

m/s, kg/hr, miles/hr

Volume units

Cm3, m3, ML

Noble Gases

Group 18

Alkali Metals

Group 1

Transition Metals

Groups 3-12

Halogens

Group 17

Alkaline Earth Metals

Group 2

Nonmetals

Groups 13-18

Atomic mass

Number of protons + number of neutrons

Atomic Number

Number of Protons