science Flashcards
Know the characteristics of each state of matter.
Solids – relatively rigid, definite volume and shape. In a solid, the atoms and molecules are attached to each other.
Liquids – definite volume but able to change shape by flowing. In a liquid, the atoms and molecules are loosely bonded.
Gases – no definite volume or shape.
What is volume?
The amount of space matter takes up.
what is Thermal Energy?
The total Kinetic Energy of all the particles in a substance.
Why is atmospheric pressure greater at lower altitudes/elevations and lower at higher altitudes/elevations?
As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level.
How is it that an increase in pressure can cause a gas to turn into a liquid even though the temperature (kinetic energy) remains constant?
Their kinetic energy can only increase if the average velocity of the particles increases.
Something to think about; as a substance changes from a solid to a liquid to a gas and vice versa, do the number of particles increase or decrease or stay the same and why?
stay the same because you are not adding or removing any of the substance
If you worked for the National Weather Service and issued a fog advisory to the public, what would the environmental conditions most likely be outside?
It is most likely to be foggy outside.
Understand the transfer of energy.
The conversion of one form of energy into another, or the movement of energy from one place to another.
What is Kinetic Energy?
The energy of motion.
What is pressure?
The force created by the collisions of these particles with other materials.
What is change of state?
The process by which matter changes from one state to another.
What is a solid?
The state of matter in which the volume and shape of a substance are fixed.
What is a liquid?
The state of matter that has a fixed volume, but can change shape.
What is a gas?
The state of matter that can change both shape and volume.
