Bennett Mechanical Test Thermodynamics and Heat 2

Question 1

A metal spoon and a wooden spoon are left in the same hot soup. Why does the metal spoon feel hotter to the touch sooner?

Accepted Answer

Metal conducts heat faster than wood

Answer

Wood absorbs more heat from the soup

Answer

Metal has a higher specific heat

Answer

Wood reflects the heat away

Question 2

What happens to most metals when they are heated?

Accepted Answer

They expand

Answer

They contract

Answer

They stay the same size

Answer

They become magnetic

Question 3

Heat moving through empty space from the Sun to Earth is an example of which method of heat transfer?

Accepted Answer

Radiation

Answer

Conduction

Answer

Convection

Answer

Insulation

Question 4

Why does warm air rise above a heater?

Accepted Answer

Warm air is less dense than cool air

Answer

Warm air is heavier than cool air

Answer

Heaters push air upward mechanically

Answer

Cool air is attracted to the ceiling

Question 5

Which surface color absorbs the most radiant heat?

Accepted Answer

Black

Answer

White

Answer

Silver

Answer

Mirror-polished

Question 6

A bridge has gaps called expansion joints. What is their main purpose?

Accepted Answer

To allow for thermal expansion and contraction

Answer

To drain rainwater

Answer

To reduce the bridge's weight

Answer

To make the bridge flexible in wind

Question 7

In which state of matter do particles have the most thermal energy and freedom of movement?

Accepted Answer

Gas

Answer

Solid

Answer

Liquid

Answer

Crystal