Relative Density
This is the reason why an object floats in water
its less dense
The units we use to measure mass is ___
grams
the units we used to measure liquid is ____
mL, mililiters
A material that lets electricity flow is called a _____.
conductor
Name the 3 most common states of matter
Solid, liquid, gas
If an object sinks, its density is ______ than water
greater, or more
If you put a rock on a scale you are finding the rock's _____
mass
If a container can hold 2 liters of water, what is its volume?
2 liters
Rubber and plastic are examples of _____
insulators
In which state of matter are particles closest together?
solid
In relative density, we are determining if an object ____ or ____.
sinks or floats
The tools/scientific instruments that are used to measure mass
Triple balance beam, balance scale, pan balance
You pour 50 mL of water into a graduated cylinder. Then you drop a rock and the water rises to 80 mL. What is the rocks volume?
30 mL
Why is metal used in wires
because it conducts electricity well
Ice melting into water is an example of a _____ change
physical change
You have a block of wood and a block of metal of the same size. Which has a greater density?
metal block
True or false: mass changes if you go to the moon.
false
True or false: two objects with the same volume always have the same mass.
false (bowling ball and basketball)
Why are pots made of metal but the handles are often made of wood or plastic?
metal cooks food quickly (more efficiently) and plastic/wood stops heat from burning hands
Going from a gas to a liquid is called _____
condensation
How can measuring relative density help you identify a mystery liquid?
can compare if it floats or sinks in water or to other liquids
You mix two substances together. What happens to the total mass?
the total mass stays the same
Name a way to find the volume of an irregular object
water displacement method, using a graduated cylinder
Which of these is the best conductor glass, wood or copper
copper
When ice turns to water and water turns to water vapor, heat is being _____
added, applied