States of Matter
What is the definition of a liquid?
has definite volume but not shape
What is the definition of temperature?
Measurement of how fast particles are moving.
I change how much sunlight a plant gets for 3 weeks and measure its growth. What is the dependent variable?
Going from a liquid to a gas is known as...
evaporation
Name an example of something melting
Answers will vary (ice cube to water, popsicle to liquid, anything going from solid to liquid)
This state of matter has particles that are moving freely and are weakly attracted to one another.
Gas
What are the 3 factors that affect how a gas behaves?
temperature, pressure, and volume
What is an independent variable?
The variable that an experimenter changes.
decrease or remove
As temperature increases, what happens to the motion of the particles?
They spread out and move faster
Name a property that all states of matter have in common.
They all are moving.
What does pressure measure?
How many times the molecules hit the inside of the container.
What is a constant?
something that does not change in the experiment
True or false: boiling point and condensation point are at the same temperature.
True
Hot gas molecules cooled down on the mirror and condensed into liquid.
What is viscosity?
The thickness of a liquid
As pressure increases, what happens to volume?
Decreases
What is the variable that you measure data for?
Dependent variable
Freezing is an example of a _____ change because energy is removed from the substance.
Exothermic
Which of the following state changes is exothermic?
evaporation
melting
freezing
all of the above
freezing
surface tension and viscosity
According to Charles's law, as temperature increases, volume ____. This is an example of a _____ relationship.
Increases, direct
5 dogs of the same breed are given different amounts of food for 2 weeks. They are weighed everyday to see how much they have gained. Name the IV, DV, and constant
IV= different amounts of food
DV= weight
Constant= same type of food and dog
Going directly from a solid to a gas is called what?
Sublimation
State change is an example of a ______ change.
Physical