unit B module 1
according to this video lesson, what is the volume
A given amount of space
on planet earth, which weighs more: a pound of gold or a kilogram of gold
A kilogram of gold
what happens to the density of the fluid within a thermometer as a thermometer registers a higher temperature
The density decreases
why is the concept of weight more complicated than is the concept of mass
Weight changes based on gravitational force, mass is constant
why did Miley move her hands as she was trying to determine which penny on her fingers was heavier
she was noting the differences in inertia
a micron is equal to
10(-6) meters
The width of a DNA molecule is about
2 nanometers
after two hours, by what percent did the air volume decrease in Kai and Maile's jar
20 percent
how did lavoisier define an element
A material that can't be broken down into simpler components
what is mass
A quality of matter
what happens to the POTENTIAL energy of a rock as it falls off a cliff
The potential energy decreases as it is converted into kinetic energy
density is a measure of what
an objects mass divided by its volume
if something has energy what can it do
apply a force over a distance
what is the value of pi the same no matter what the size of the circle
as a circumference gets bigger side of the diameter
what is the density of a material the same no matter what size of the material
because as a mass of a material gets bigger so does the volume it occupies
why is it important that you explore the hands-on chemistry activities presented in the textbook
it takes direct experience to become an expert at something
what happens to the chemical potential energy of a combustible material after it burns
it transforms into heat
Who had the correct prediction Kai or Maile
maile
in general, a virus is
much smaller than a bacterium
if Maile how to remove all the pennies from the film case before putting it back in the water, who would've been right, kai or maile? for what reason
neither. If all the pennies are taken out, then the canister would be floating
if left longer, with the jar fill up with more water? Why or why not
no, all the oxygen within the jar has been consumed
why do you need to place the opening of the jar in a container of water
to create a sealed chamber
Kai says "what you're doing is you're measuring inertia what it takes to lift that penny." Why would it have been better of him to have said "...what it takes to move that penny"?
when you lift the penny you're fighting against the pennies inertia and weight
What Metal is used to fill the inside of pennies manufactured after 1982
zinc
what happens to the KINETIC energy of a rock as it falls off a cliff
The kinetic energy increases as it arises from potential energy
