Lesson 1.1

Question 1

air pressure

Answer 1

the force that air puts on an area

Question 2

conduction

Answer 2

the transfer of heat energy within an object, or between objects that are directly touching each other, due to collisions between the particles in the objects

Question 3

gas

Answer 3

a state of matter without any defined volume or shape

Question 4

kinetic energy

Answer 4

the energy an object has because of its motion

Question 5

liquid

Answer 5

a state of matter with a defined volume but no defined shape and whose molecules roll past each other

Question 6

matter

Answer 6

material that has mass and takes up some amount of space

Question 7

mixture

Answer 7

a combination of substances that can be physically separated from one another

Question 8

pure substance

Answer 8

a material with a particular chemical makeup

Question 9

solid

Answer 9

matter with a fixed volume and shape

Question 10

temperature

Answer 10

a measure of the average kinetic energy of the atoms in a system, used to express thermal energy in degrees

Question 11

thermal energy

Answer 11

energy in the form of heat