In this interactive object, the learner examines how pressure and volume relate to each other.

Students examine standard pressure in this interactive object.

In this animated and interactive object, learners examine the properties of liquids, solids, and gases.

Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.

In this learning activity you'll describe the operation of an AND gate by using a truth table, a waveform diagram, a Boolean Algebra equation, a switch analogy, and a written definition.

In this learning activity you'll review how an OR gate operates using a truth table, a Boolean Algebra equation, a switch analogy, and a written statement.

In this interactive object, learners examine geometric characteristic symbols, tolerances, datum feature symbols, and other control frame information. A brief quiz completes the activity.

Learners read about the similarities of electronic and hydraulic components and then match the schematic symbols in a drag-and-drop exercise.

kekuatan asid dan alkali

Review atoms and elements.

The peridodic table, with my best wishes.

Practice counting atoms