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