Temp and Energy
Do we gain or lose energy when we change from a solid to a gas?
What is gain.
what is melting.
this gas is found in LED signs
what is neon.
matter than has a definite volume but no definite shape.
What is volume?
What is the amount of space an object occupies.
Do we gain or lose temperature when changing from a gas to a solid?
What is lose.
liquid -> solid
What is freezing.
this gas is highly explosive and is a fuel alternative.
what is hydrogen.
definition of a gas.
matter that has no definite volume and takes the shape of it's container.
What is a quantitative observation?
What is an observation that focuses on numbers or value.
What phase of matter has the highest heat energy?
What is gas.
gas -> liquid
this gas is found in party balloons.
what is helium.
list two properties of air.
answers vary.
What is the equation to calculate density?
What is density = mass / volume.
What happens to air particles when air is cooled?
What is they slow down and contract.
liquid -> gas
what is evaporation.
this gas is a byproduct of manure.
what is methane.
which two gases make up 99% of the air we breathe and what are the percentages?
What are oxygen 21% and nitrogen 78%
What is compressible?
The ability to be squeezed to a smaller volume.
Explain particle speed as it relates to temperature.
What is the higher the temp, the fast the particles. The lower the temp, the slower the particles.
solid -> gas
what is sublimation.
this gas is the burnt match smell
what is sulfur dioxide.
Explain why air can be compressed while water cannot be.
What is air particles are very spaced out while water particles are close together.
What does the theory of absolute zero suggest?
What is at that temperature, absolute zero, there is no particle movement.