T7 Lesson 1 What is Density?

A block of wood has a mass of 150 grams and a volume of 200 cm³. What is the density of the wood?

• 0.75 g/cm³

• 1.33 g/cm³

• 0.50 g/cm³

• 1.50 g/cm³

A rock is placed in a graduated cylinder containing water. The water level rises from 50 mL to 70 mL. If the mass of the rock is 40 grams, what is its density?

• 2 g/mL

• 1 g/mL

• 0.5 g/mL

• 4 g/mL

You have two liquids: Liquid A with a density of 0.8 g/mL and Liquid B with a density of 1.2 g/mL. If you pour both into a container, which liquid will float on top?

• Liquid A

• Liquid B

• Both will mix evenly

• Neither will float

A metal cube has a side length of 3 cm and a mass of 81 grams. Calculate its density.

• 3 g/cm³

• 9 g/cm³

• 1 g/cm³

• 27 g/cm³

A student finds a piece of metal and wants to determine its density. They measure the mass to be 250 grams and the volume to be 50 cm³. What is the density of the metal?

• 5 g/cm³

• 2.5 g/cm³

• 7.5 g/cm³

• 10 g/cm³

A scientist has two samples of the same liquid. One sample is at 20°C and the other at 80°C. How might the density of the liquid change with temperature?

• Density increases with temperature.

• Density decreases with temperature.

• Density remains constant.

• Density fluctuates randomly.

A piece of clay is molded into a ball and then into a flat disc. How does the density of the clay change with its shape?

• Density increases when shaped into a disc.

• Density decreases when shaped into a disc.

• Density remains the same regardless of shape.

• Density fluctuates with shape.

A student is given a task to find the density of an irregularly shaped object. Describe a method they could use to determine the object's density.

• Measure the object's dimensions and calculate volume.

• Use a balance to find mass and a graduated cylinder to find volume by water displacement.

• Weigh the object in air and then in

A liquid has a mass of 200 grams and occupies a volume of 250 mL. What is the density of the liquid?

• 1.0 g/mL

• 0.8 g/mL

• 1.2 g/mL

• 0.5 g/mL

A block of ice is floating in water. What can be said about the density of ice compared to water?

• Density of ice fluctuates with temperature.

• Ice and water have the same density.

• Ice is less dense than water.

• Ice is denser than water.