matter hw

1.1) Because weight changes in different elevations
1.2) 688.5 cm sq.
1.3) g/v cubed
1.4) mass / volume
1.5) L x W x H
2.1) physical is a visible change, chemical is a change in chemicals
2.2) dispalcement, synthesis, decomposition, and combustion
2.3) mass of a closed space will remain constant- empedocles
2.4)  thermal energy is energy from heat whereas heat is the movement of particles
2.5) exothermic is giving off heat, endothermic is taking in heat
3.1) thermal, kinetic, electric
3.2) kinetic
3.3) potential
3.4)  a wave of energy in matter
3.5) thermal energy is matter moving and generating heat
4.1) in warm temperatures, particles speed, in cooler they slow
4.2) because the particles speed up and hold it more losely
4.3) the vibrations hold matter together
4.4) when the particles move fast and escape
4.5) when solid turns into a gas before liquid
5.1) between pressure and volume
5.2) because the gas expands
5.3) pV=K
5.4) so they know necesarry pressures
5.5) so they know how much air is in their oxygen tanks