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Woodruff-8th grade

Woodruff-8th grade test- physical science

Matter anything that has mass and takes up space
Mass amount of matter in an object
Volume the amount of space an object takes up
4 phases of matter solid, liquid, gas, plasma
Phase change- gains heat melting and evaporation
Phase change- loses heat condensation and freezing
Elements basic building blocks of matter
atom smallest particle of an element
compound two or more elements
3 parts of an atom proton, electron, and neutron
proton- type of charge positive
neutron- type of charge neutral
electron- type of charge negative
Elements are organized by their ____ on the periodic table properties
On the periodic table _____ are the vertical columns groups
____ are the horizontal columns on the periodic table rows
In the periodic tables ____ are to the left of the staircase metals
In the periodic tables ____ are to the right of the staircase nonmetals
molecule smallest part of a compound
Two types of bonds that bind molecules together ionic and covalent
mixtures when two or more substances are put together and do not make a new substance
solution undisturbed mixture containing solute and solvent
solute part of a solution that gets dissolved
solvent part of a solution that does the dissolving
density mass divided by volume
density of water 1 gm per cubic centimeter
If an object has a density of more than 1, it will (float, sink) sink
If an object has a density of less than 1, it will (float, sink) float
buoyancy ability to float
_____ changes alter size and shape of an object physical
____ change creates a new substance chemical
In a chemical equation, the (reactants, products) are on the left reactants
Law of Conservation of Matter Matter cannot be created nor destroyed- only changed from one form to another
force push or pull
weight the amount of gravitational pull on an object
speed distance/time
velocity distance/time with a direction
acceleration final velocity-starting velocity/time
Newton's First Law of Motion an object at rest will stay at rest and an object in motion will stay in motion unless an outside force acts on the object
Newton's Second Law of Motion Force/Mass or Force x Mass= acceleration
Newton's Third Law of Motion For every action there is an equal and opposite reaction
Work Force x Distance
Machine transfers ____ energy mechanical
resistance force it much overcome
effort force applied
fulcrum pivot point
list six simple machines lever, pulley, wheel and axle, screw, wedge, inclined plane
energy ability to do work
potential energy stored energy
kinetic energy energy of motion
Light and sound travel in forms of ____ waves
wavelength distance from crest (top) to crest
amplitude height of the wave
frequency the number of waves that pass a given point in a certain time
heat is produced by _____. vibrating molecules
Addition of heat causes expansion
Loss of heat causes contraction
heat travels from ____ to ____ warm, cold
3 ways heat moves radiation, conduction, convection
Movement of heat through space is called _____ radiation
Movement of heat through a liquid or gas is called _____ convection
Movement of heat through a solid is called _____ conduction
law of magnetic poles- like poles will ____ and unlike poles will ____ repel, attract
electricity produced by the flow of electrons from one point to another
Allow electricity to flow through it conductors
Do not allow electricity to flow through insulators
series circuit single path
parallel circuit two or more paths
If one bulb blows the ____ circuit dies and the ____ still works series, parallel
visible form of energy that travels in paths light
light that is bounced off is called reflected
Light that is taken in and transferred is called absorbed
Light that goes right through is called transmitted
bending of light refraction
Dark or light surfaces absorb more light dark
A concave lens curves (inward, outward) inward
A convex lens curves (inward, outward) outward
Shows the frequency and wavelengths of light waves electromagnetic spectrum
calorie unit for measuring energy in food and fuel
watt rate at which energy is used over a period of time
hydroelectric energy electricity produced by the power of flowing water
nuclear energy energy stored in the nucleus of an atom
Splitting uranium releases ___ energy and creates ____ and ____. heat, thermal pollution and nuclear waste
List three problems with fossil fuels pollution, acid rain, lung disease, oil spills, and the greenhouse effect
conservation the saving of natural resources through wise use
Created by: seagullq