Temperature, Thermal Energy, & Heat

Question 0

Why do substances get larger as they get hotter?

Answer 0

The atoms bounce off one another and do not want to collide

Question 1

What is temperature?

Answer 1

Temperature is the measure of the kinetic energy in a substance’s molecules

** atomic motion

• the hotter a substance, the fasters its atoms move -

Question 2

What does the amount of thermal energy a substance has depend on?

Answer 2

The amount of thermal energy depends on the quantity of a substance

A bathtub at 90 degrees has more thermal energy than a cup of coffee at 120 degrees (more molecules/energy stored

Question 3

What is conduction?

Answer 3

Conduction occurs when heat is transferred due to fast moving atoms and molecules colliding with slower ones in a neighboring region

Ex. Heat moving through a spoon in hot soup

**solid

Question 4

What is convection?

Answer 4

Convection occurs when cooler portions of a liquid or gas flow in to take the place of hotter, rising, portions

Ex. Hot water moves in from the bottom of a boiling pot cause cool water to bring air(bubbles released), fill in and churn
Ex. Convection oven (gas) same idea

** liquids,gases

Question 5

What is radiation?

Answer 5

Radiation occurs when heat is transmitted in the form of electromagnetic waves