Key Concepts Lesson 1 quiz Flashcards
What is chemistry the study of?
Chemistry is the study of matter.
What is matter made of?
Matter is made up of extremely tiny particles called atoms and molecules.
What do atoms and molecules make up?
Atoms and molecules make up the three common states of matter on Earth—solids, liquids, and gases.
Are the particles in a liquid attracted to one another?
Yes
Are the particles in a liquid in motion?
Yes
Are the particles in a liquid able to move past one another?
Yes
Is being a solid, liquid, or gas a property of a substance?
Being a solid, liquid, or gas is a property of a substance.
What does heating a liquid do to the molecules?
Heating a liquid increases the speed of the molecules.
What does an increase in the speed of the molecules do?
An increase in the speed of the molecules competes with the attraction between molecules and causes molecules to move a little further apart.
What does cooling a liquid to do the molecules?
Cooling a liquid decreases the speed of the molecules.
What does a decrease in the speed of molecules do?
A decrease in the speed of the molecules allows the attractions between molecules to bring them a little closer together.
Is the way a thermometer works an example of heating and cooling a liquid?
Yes
What does heating the molecules of the liquid in a thermometer do?
When heated, the molecules of the liquid in the thermometer move faster, causing them to get a little farther apart. This results in movement up the thermometer.
What does cooling the molecules of the liquid in a thermometer do?
When cooled, the molecules of the liquid in the thermometer move slower, causing them to get a little closer together. This results in movement down the thermometer.
In a solid, are the atoms attracted to one another?
In a solid, the atoms are very attracted to one another.
Do the atoms in a solid stay in a fixed position and not move?
In a solid, the atoms vibrate but stay in fixed positions because of their strong attractions for one another.
What does heating a solid do?
Heating a solid increases the motion of the atoms.
What does an increase in the motion of the atoms do?
An increase in the motion of the atoms competes with the attraction between atoms and causes them to move a little further apart.
What does cooling a solid do?
Cooling a solid decreases the motion of the atoms.
What does a decrease in the motion of the atoms do?
A decrease in the motion of the atoms allows the attraction between atoms to bring them a little closer together.
