In this animated activity, students read about weight-volume relationships within a given sample of soil or aggregate. They complete problems using a 3-phase diagram.

Students read how to determine and calculate the porosity for a given sample of soil or aggregate, based on the weight-volume relationship.

You'll practice converting between units of measure for weight in the metric and English measurement systems.

Students read an explanation of the use of weight-volume relationships and practice calculating density.

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

Students read how to determine and calculate the degree of saturation for a given sample of soil or aggregate based on the weight-volume relationship.

Students read about the concept of unit weight relating to the 3-phase diagram and perform calculations.

You'll practice converting between units of measure for weight in the English Measurement System.

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

Students read how to determine and calculate the void ratio for a given sample of soil or aggregate based on the weight-volume relationship.

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

This interactive learning object demonstrates how the moisture content is determined for a given sample of soil or aggregate.

Learners read the definition of atomic weight and obtain the weights of elements by viewing the Periodic Table and charts that list atomic weights by name or symbol.

Learners examine the method for calculating the atomic weight of copper from the natural percent composition of each of its two isotopes.

In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.

Students read about the basic organization and structure of the periodic table of elements. By clicking on the symbol, they can read that element's atomic number and weight. In an exercise, students identify elements as belonging to a group, a period, or neither.

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

You'll review matter and atoms

You'll find the greatest possible error of measurement numbers.