Units
Unit for the mass of a solid
What is the formula for finding the volume of a solid object?
V= LxHxW
In order to calculate the density of the object, what two things will we need to know about the object?
It's mass and volume
Matter generally ______ at cooler temperatures and ______at warmer temperatures.
compresses, spreads out
Solve for the volume of a box that has a width of 2 cm, a length of 10cm, and a height of 6 cm.
120 cm3
____ cm3 = _____mL
1cm3 = 1mL
D= M/V g/cm3
If I have 1 ton of feathers and 1 ton of bricks, which one would have a larger volume?
The feathers
If we cut a brick of gold in half, what happens to the density and why?
The density stays the same. Same mass per volume ratio. The arrangement of atoms does not change.
Solve for the density of a box that has a density of 120cm3 and a mass of 600 g.
Density = 5g/cm3
Unit for the volume of a solid
cm3
Matter is anything that occupies ______ and has _______.
space and mass
If I have 1 ton of feathers and 1 ton of bricks, which one would be more dense?
The bricks
If you squeeze a loaf of bread to half it's original size, what happens to the density and why?
The density increases, there is less space between the atoms. The mass stayed the same but the volume decreased.
If an object has 1.4 g/cm3 density will it float or sink in pure water?
sink
The units for density
g/cm3
Of our three main states of matter, arrange them from the least dense to the most dense (generally).
Air, Liquid, Solid
Why does air bubbles rise to the surface of a glass of soda?
Air bubbles have less density and therefore float to the top
Ice floats in water, which means what about the spacing of the water molecules in ice?
Solve for the density of an object that has a mass of 24g and a volume of 8mL.
3 g/mL
Displacement
If we heat up gad what happens to the density of the gas?
The atoms move more creating more space, making the gas less dense
What is the density of pure water? (Use units)
1g/cm3
How do hot air balloons work?
Heat the air and balloon, the balloon spreads creating more volume and the surrounding air heats up moving around more creates more space, making the air less dense. Both these things cause the air balloon to rise.
Solve for the density of an object that has a mass of 30 g and a volume of 90mL.
1/3 g/mL