Cooking with Heat: Understanding Energy and Temperature

What is the energy density of wood?

• 30 megajoules per kilogram

• 14 megajoules per kilogram

• 10 megajoules per kilogram

• 20 megajoules per kilogram

Why do you need less charcoal than wood to cook the same amount of food?

• Charcoal burns faster

• Charcoal has a higher energy density

• Charcoal is easier to light

• Charcoal is cheaper

How is energy reported in the specifications of an oven?

• In watts

• In volts

• In calories

• In joules

What happens to molecules in a material when heat is applied?

• They stop moving

• They change color

• They move slower

• They jiggle faster

What is temperature a measure of at the molecular level?

• The color of the material

• The size of the molecules

• The motion of the molecules

• The weight of the material