What is the formula for calculating density?

Density = mass / volume

True or False: An object with a density greater than 1.0 g/cm³ will float in water.

False. Objects with a density greater than 1.0 g/cm³ will sink in water.

Riddle: I can be solid or liquid, but when heated, my particles move faster and take up more space. What am I?

A substance (like a solid or liquid)

Fill in the blank: The ability of an object to float or sink is determined by its ______ compared to water.

Density

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

C) Osmium

Short Answer: What happens to the density of a gas when it is compressed?

The density increases.

True or False: Metals are typically poor conductors of thermal energy.

False. Metals are good conductors of thermal energy.

Fill in the blank: ______ is the process where a liquid changes into a gas, leading to cooling.

Evaporation

Riddle: I am a form of heat transfer that can occur through empty space. What am I?

Radiation

What is the term for materials that do not conduct heat well?

Insulators

True or False: The principle of buoyancy allows ships made of steel to float.

True.

Fill in the blank: When thermal energy moves from a hot object to a cold object, it is said to have ______.

Dissipated

Which of the following gases is used in balloons because of its low density? A) Oxygen B) Helium C) Carbon Dioxide D) Nitrogen

B) Helium

Short Answer: What is the average density of water in g/cm³?

1.0 g/cm³

Fill in the blank: The law of ______ states that energy cannot be created or destroyed, only changed or transferred.

Conservation of energy