In this learning activity you'll explore the difference between mass and weight.

You'll practice converting between units of measure for length, mass, and capacity in the metric system.

Atomic weights are used to convert the mass of a sample into the number of moles of the element in the sample and vice versa. Four examples are provided for practice.

Learners read definitions of atomic symbols, atomic numbers, and mass numbers and then answer questions about the number of neutrons, protons, and electrons in select elements.

In this learning activity you'll examine force, mass, and acceleration to understand this "Law of Acceleration."

Students read how to determine and calculate the saturated density for a given sample of soil or aggregate, based on the mass-volume relationship. Practice problems complete the activity.

Students identify the parts of a triple beam balance and practice measuring the mass of objects.

Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.

Students read how to determine and calculate the dry density for a given sample of soil or aggregate based on the mass-volume relationship.

Strength of Materials

You'll review matter and atoms

Matter Vocabulary

Learners observe that the volume of one mole of any gas is 22.4 L at standard temperature and pressure. An illustration shows that only the mass of the molar volume differs with the identity of the gas.

How many points can you amass by answering questions on this database design tool.

Learners study the most common ways to measure fluid flow for industrial processes including absolute quantity, percentage, volumetric flow rate, and mass flow. A brief quiz completes the activity.

Learners examine the method used to calculate the mass percent of an element in a compound. Three examples and one problem illustrate the method.