Mass is the amount of matter that makes up an object
100
What is thermal conductivity?
Name one material with poor thermal conductivity and another material with good thermal conductivity.
the rate at which a substance transfers heat
poor: styrofoam
good: metal
100
What is reactivity? Name one highly reactive element.
-the ability of a substance to change into one or more new substances.
-iron
100
In which state of matter are molecules closest together?
Solid
200
Which has more volume: a pound of feathers or a pound of bricks?
A pound of feathers has more volume
200
What is the difference between mass and weight?
Weight is a measure of the gravitational force on an object. An object's weight can change depending on the object's location (on the moon, for example)
200
What is ductility? Name one ductile material.
the ability to be pulled and made into wire.
Copper.
200
What is flammability? Name one material that is flammable.
The ability of a substance to burn. Wood, gasoline, and propane are flammable.
200
Why (at the molecular level) does gas take up more space than liquid?
The molecules have more energy, so they bounce around more and spread out
300
What is the scientific tool often used for measuring liquids called?
A graduated cylinder
300
What has more mass: a pound of feathers or a pound of bricks?
Their mass is the same (one pound)
300
What is malleability?
Name one malleable material.
The ability to be rolled or pounded into various shapes without breaking.
Aluminum
300
What is the difference between a physical and a chemical property?
A physical property can be observed without changing the matter's identity. Chemical properties can only be observed once a chemical reaction takes place.
300
True or false: compounds like water exist in all three states of matter, but gases like helium are always gases.
False! Every element can exist in all three main states.
400
What is the SI unit for volume?
Liters
400
What is the SI unit for mass?
Kilograms
400
What is solubility? Name one material that is soluble in water.
The ability to dissolve in another substance.
Table salt (NaCl) dissolves in water.
400
Which is easier to reverse: a chemical change or a physical change? Give an example of each.