Test 2: Radiation, Applications and Greenhouse Effect

Question 1

How does heat transfer occur through radiation?

• AThrough direct contact between objects
• BThrough the movement of heated fluid
• CThrough electromagnetic waves without needing a medium
• DThrough the absorption of water molecules

Question 2

The surface which absorbs and emits the most radiation is:

• Asmooth and shiny surfaces
• Bdark and rough surfaces
• Ctransparent and thin surfaces
• Dpolished and white surfaces

Question 3

What is the role of the greenhouse effect in Earth's temperature regulation?

• AIt allows all heat to escape into space
• BIt blocks heat from entering the atmosphere
• CIt traps heat to maintain a stable temperature
• DIt causes immediate cooling of Earth's surface

Question 4

The Sun's heat reaches the Earth:

• Athrough conduction between air particles
• Bthrough convection in space
• Cthrough radiation via electromagnetic waves
• Dthrough reflection by the moon

Question 5

The Sun's heat does not reach the Earth by conduction or convection because:

• Athere is no medium between the Sun and Earth's atmosphere
• Bthe Sun is too hot
• Cair is too dense
• Dthe Earth is a solid