T or F: Rubber and glass become softer and softer over a wide range of temperatures. They are examples of crystalline solids.
f: amorphous
100
Solid, Liquid and gas
What are the three states of matter?
100
What does temperature measure?
The average energy of motion of the particles in a substance.
100
What is the formula of calculating pressure?
Pressure = force / area
100
The building blocks of matter are called
elements
200
T or F: The energy from the movement of particles id measure by the temperature of a substance.
True
200
Which state has a definite shape and volume?
Solid
200
Grams and kilograms are used to measure what?
mass
200
What is the formula for calculating area?
Area = force/ pressure
200
A formula shows the ratio of elements in
A compound
300
T or F: If gas is contained in a rigid container, raising its temperature will increase its volume.
F pressure
300
Which state has only definite volume?
Liquid
300
Which state of matter has a volume only under extreme pressure?
gas
300
Ms. Fothergill realizes her 8th grade class is under too much pressure. Instead of giving easy homework she literally decreases the pressure in her room. Which of the following would decrease pressure?
a) removing air particles from the room
b) changing the color of the walls
c) Adding more area by knocking down a wall
d) increasing the gravity in the room
a and c
300
The density of an object equals
its mass divided by its volume
400
T or F: Charles' Law states that the volume of a gas varies inversely with its temperature.
F: directly
400
Cm3 = 1 mL both units are used to measure what?
Density
400
Which state of matter is known for expanding?
gas
400
What is the pressure applied to your desk if your book applies 10 Newtons of pressure over an area of 2 meters squared
5 kpa
400
Dalton imagined atoms to be...
a) rigid unbreakable spheres
b)all exactly alike
c) always joined together in compounds
d) of equal mass
a) rigid unbreakable spheres
500
T or F: the boiling point of a liquid is lower at sea level than on a mountain.
F: higher
500
At 0 degrees celsius particles of a substance are within touching distance but are not touching. What will happen as the temperature lowers to -10 degrees Celsius?
The substance will become a solid
500
As the temperature of a gas increases, what happens to the particle's speed?
It increases
500
If a tank of Helium has a pressure of 5 pascals and an area of 100 meters squared, what is the force the helium is putting on the tank walls?
500 newtons
500
A method used to release iron metal from its ores involves
a) heating the ore and carbon together
b) cooling the ore in an ice bath
c) breaking the ore into smaller pieces
d) panning