Show:
States of Matter
Heat and Temperature
Particles
Fluids and Density
Random Off-topic Stuff Worth 2x Points-- IMPOSSIBLE DIFFICULTY
100
Name the three states of matter.
Solids, liquids, and gases.
100
What happens to matter when its temperature increases? When its temperature decreases?
When the temperature increases, the object expands. When the temperature decreases, the object contracts.
100
How do particles in a solid move?
They vibrate.
100
Which states of matter are fluids?
Liquids and gases.
200
How are solids and liquids different in shape and volume?
Solids have a definite volume and shape, while liquids have a definite volume but not a definite shape.
200
What is the difference between heat and temperature?
Heat is the energy transferred from one object to another as a result of a difference in temperature or a change of state. Temperature is the average kinetic energy of a substance's particles.
200
True or false?: Particles are attracted to each other.
True.
200
What is the equation for density?
Mass Density=---------- or D=M÷V Volume
200
What temperature is required to form a Bose-Einstein Condensate?
1 billionth of a degree above absolute zero.
300
Describe mass and volume.
-Mass: The quantity of matter that is contained in an object or substance. -Volume: the amount of space an object takes up.
300
Which way does thermal energy flow when two substances with different thermal energies come into contact?
Thermal energy flows from high to low, just like diffusion.
300
Why do liquids have no definite shape? Please use the word "particles" in your answer.
Liquids do not have a definite shape because the spacing between particles in liquids lets the particles slip and slide past each other, changing their position.
300
Usually, solids are denser than liquids. What is one exception of this?
Solid water, or ice.
400
Name all six changes in state of matter, and describe the states of matter they go between.
Melting: solid to liquid Solidification: liquid to solid Evaporation: liquid to gas Condensation: gas to liquid Deposition: gas to solid Sublimation: solid to gas
400
How does a thermometer measure temperature?
A thermometer measures temperature by the expansion and contraction of a liquid inside a small, narrow tube.
400
What are two other names for "particles" in the kinetic molecular theory?
Atoms and molecules.
400
In what situation would a tin box (which is much denser than water) float on water?
It would float if it was hollow, because the AVERAGE density would be lower than that of water.
400
What happens to atoms when they form a Bose-Einstein Condensate?
The atoms seem to blend together, so you can't tell between one atom and another.
500
In the past, there has been some question as to the physical state of glass. It has been argued that glass is a very stiff liquid. now glass is known to be a type of solid called a _________ _____.
amorphous solid
500
Why does glass break when it is heated, then cooled quickly?
When the glass touches the cold water, it begins to contract. However, glass does not conduct heat very well, so parts of the the glass that are not yet in contact with the cold water remain expanded. This uneven contraction causes enough stress to break the glass.
500
What are the main three points of the kinetic molecular theory?
1. All matter is made up of very small particles. 2. There is empty space between particles. 3. Particles are constantly moving.
500
What is the density of gold (to 2 decimal places)?
19.32 g/cm³.
500
How many dimensions in total are described in string theory? Why can't we perceive them all?
There are 11 dimensions in string theory. We cannot perceive them because they are so tiny and curled up that they are many times smaller than an atom.