Physical Science- unit 2 Flashcards
What is matter
anything that has volume and mass( takes up space and weight)
what are elements
pure substances
what is a mixture
putting 2 or more things together
homogeneous mixture? what is it, name one, and why is it homogeneous?
Same throughout (ex: blood, white milk, coffee, etc) homogenous because you cannot see or separate the parts of it
heterogeneous mixture? what is it, name one, and why is it heterogeneous?
different throughout (ex: salsa, mud, lake) you can see or separate the parts
what is proton? what charge? where is it
positive charge- located in the nucleus
what is neutron? what charge? where is it
no charge- located in nucleus
what is an electron? what charge? where is it
negative charge- located on the electron shell
4 states of matter on earth
solid, liquid, gas, plasma
3 common states of matter on earth describe energy
solid- least, liquid- middle, gas- most
describe what is happening t hte molecules as energy is increased from solid to liquid to gas. then descirbe the names of the phasing events and when they occur
solid- little vibration, liquid, more vibration, gas- lots vibration.
solid to liquid- melting
liquid to gas- evaporating
gas to liquid- condensation
liquid to solid- freezing
Celcius freezing and boiling points
0, 100
Fahrenheit freezing and boiling points
32, 212
valence shell and valence electrons
outmost shell, outer most electrons
ionic bond
transfers electrons
covalent bonds
share electrons
which bond conducts electricity? how?
ionic bond. electrons moce from positive to negative
electricity
electrons
how does movement of ionic bond change polarity of molecule
one has more electrons than protons and one has more protons than electrons so they go together and give each other one
what charges repel each other? what attract?
repel: - -, ++ attract: -+,+-
