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

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.

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.

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

Learners view an explanation of how to read a graduated cylinder by measuring the lowest portion of the meniscus. A quiz completes the activity.

This document is a visual and text description of the three-wire method for measuring screws for use with a lathe.

In this interactive learning object, students view the ammeter connections for measuring currents in a parallel circuit with three branches on an energy concepts lab board. A brief quiz completes the activity.

In this learning activity you'll explore how units in the metric system are related to each other and practice locating measurements on a metric line.

Learners convert units used to designate pressure. Units for pressure are atm, mm Hg, torr, and pascal.

This video shows how to measure a hole diameter of a part using small hole gages.

This video shows how to measure the inside diameter of a part using telescoping gages.

Learners examine the proper way to set up standard and metric micrometers to measure the wear on a brake drum.

The learner will define indirect measurement, identify common indirect measuring tools, and select the proper measuring tool for the situation.

In this learning activity you'll review the steps for calibrating the length of depth micrometer measuring rods.

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

Learners view animations showing methods of measuring the pH level of a solution using litmus paper and electronic instruments.

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

In this learning activity you'll review angles and different types of angular measuring tools associated with manufacturing.

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.

Students use algebra to rearrange formulas and solve for the missing volume, density, or mass quantity.