Question | Answer |
define mass
what is the unit for mass | amount of matter in an object
grams |
define volume
what is the unit for volume | amount of mass in a given space
ML |
define density
what is the unit for density | an objects ability to sink or float
g/ml or g/cm3 |
how do you find the volume of an irregular shaped idem? | displacement |
what is the formula to find volume | mass divided by density |
what is the formula to find density | mass divided by volume |
what is the formula to find mass | density times volume |
what is a safe way to sell something in a lab | wafting |
when should you wear safety goggles | when working with heat,chemicals,fire,and glass |
define independent variable | |
define controlled variable | |
define dependent variable | |
elements in the same group have what in common | # of valance electrons (react chemically simular) |
elements in the same period have what in common | # of electron shells |
what is the charge of a proton | positive |
what is the charge of a neutron | negative |
what is the charge of an electron | non or neutral |
mass is ------ | middle |
what is the large number in front of am element called | coefficient |
what is the small number after an element called | subscript |
define compound element | |
define element | |
define chemical change | |
lidt the 6 evidences that a chemical change has occurred | 1.unexpected color change
2.gas produced
3.odor produced
4.solid precipitate formed
5.light produced
6.tempature change |
what die the law of conservation of mass state | nothing is ever created or destroyed only changed |
define observation | statement using your 5 senses |
define inference | conclusion based on your observation |
define hypothisis | statement about what you think will happen |
what is the main rule when creating a hypothesis | making sure it is an if then statement |
what is the formula for speed | distance divided by time |
what is the formula for distance | speed times time |
what is the formula for time | distance divided by speed |
what is the formula for force | acceleration times mass |
what is the formula for acceleration | force divided by mass |
what i the formula for mass | force divided by acceleration |
when conculating acceleration what unit do you use | m/s2 |
define balanced force | |
define unbalanced force | |
What is newtons first law | |
what is newtons 2nd law | |
what is newtons 3rd law | |