A measure of how tightly packed the atoms are in a substance
Density
The temperature when a liquid changes phases to a gas.
Boiling Point
The curved surface observed in a liquid placed in a graduated cylinder.
The meniscus
Name 3 physical properties that stay the same for a substance, regardless of the amount of matter.
Melting/Boiling/Freezing Point, Density, Solubility
Equation for Density
Density = Mass divided by Volume
The temperature when a solid changes phases to a liquid.
Melting Point
How can you measure the volume of an irregular shaped object using a graduated cylinder?
Record an initial water level. Drop the object in. Measure the higher level. Then subtract the low level from the high level.
How can you change the solubility of a substance?
Heat up the solvent (change temperature), stir/shake it in the solvent.
What must the density of an object be, in order to float in a liquid, compared to the density of the liquid?
The density of the object must be less than the density of the liquid.
The temperature when a liquid changes phases to a solid.
Freezing Point
A measurement of how much space an object takes up.
Volume
the smallest particle (unit) of matter
Do you weight more or less on the moon?
Less. Gravity is 1/6th as strong on the moon, so your weight is 1/6th of your weight on Earth.
To make something more dense and sink, what are two things can we change about it?
Its volume or its mass. (D=M/V)
How do the atoms behave in a substance that is heated up?
The speed up, expand, and spread out.
Units on a graduated cylinder or the units used to measure volume.
mL (milliliters)
a measurement that indicates how heavy a person is due to gravity
Weight
Ice floats in water because its density is MORE or LESS than the density of water?
LESS (Less density)
How does a balance look when the masses are equal?
Level