What is the formula for calculating density?

Density = mass / volume

True or False: A solid is defined as a material that has internal air spaces.

False. A solid is a material that does not have internal air spaces.

Riddle: I can sink or float, depending on my mass and the volume I occupy. What am I?

An object

Fill in the blank: The process of finding the volume of an irregular shape by submerging it in water is called ______.

Water Displacement

Which of the following materials has the highest density? A) Helium B) Water C) Osmium D) Air

C) Osmium

True or False: Heat is the average energy of the particles in a substance.

False. Heat is the total thermal energy of all particles in an object.

What phenomenon explains why steel ships can float despite their high density?

Buoyancy

Fill in the blank: The ability of an object to float is determined by its density ______ that of water.

In comparison to

Which method is used to transfer thermal energy in liquids and gases?

Convection

Riddle: I travel through space without needing a medium, and I can warm your skin. What am I?

Radiation

True or False: Evaporation leads to an increase in temperature of the remaining liquid.

False. Evaporation causes the temperature of the remaining liquid to decrease.

What is the primary reason gases are less dense than liquids?

Their particles are spaced far apart.

Fill in the blank: The process of heat transfer through direct contact is called ______.

Conduction

Which of the following is an example of a poor conductor of heat? A) Wood B) Copper C) Aluminum D) Iron

A) Wood

What happens to the density of a gas when it is heated?

It decreases because the gas expands.