Focus On Earth Science: California Grade 6

Lesson 4: Conduction, Convection, and Radiation

Standards Check

1.
Energy is transferred by radiation when an object absorbs _______. 3.d
A)kinetic energy
B)gravitational potential energy
C)electromagnetic waves
D)sound waves
2.
Why does conduction occur in materials? 3.c
A)Thermal expansion occurs when materials are heated.
B)Atoms move from one place to another in the material.
C)Atoms give off electromagnetic waves.
D)Atoms in the material collide with neighboring atoms.
3.
For conduction to occur from one material to another, the two materials must be _______. 3.c
A)in contact
B)fluids
C)at the same temperature
D)at the same height
4.
A convection current can occur if a fluid ______ when it is heated. 3.c
A)becomes less dense
B)becomes more dense
C)becomes a solid
D)gives off energy
5.
Why does convection occur in fluids, but not in solids? 3.c
A)The matter in fluids doesn't flow.
B)The matter in solids doesn't flow.
C)Solids are denser than fluids.
D)Solids are less dense than fluids.
6.
Which process can transfer thermal energy through space? 3.d
A)convection
B)conduction
C)radiation
D)friction
Grade 6
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