This online lesson discusses sound waves as pressure waves. Compressions and rarefactions and defined and described.

In this activity, students are challenged to find the speed of a battery-powered car. Students will devise their own procedure to measure distance and time and calculate speed over several trials. Students will generate a complete lab write-up to summarize the lab.

In this unit, students will learn how charged objects behave. Students are introduced to charged particles and uncharged particles, interactions between charged and uncharged particles, and conductors and insulators. Students will also learn about the process of polarization. This unit includes videos, animations, and mini quizzes to check for understanding and facilitate learning.

In this unit of study, students will learn about electric fields. Students will look at how an object can be charged and how the charge affects other objects in the vicinity. Lessons in this unit include: Action at a Distance; Electric Field Intensity; Electric Field Lines; Electric Fields and Conductors; and Lightning. This unit includes questions at the end of each section to allow students to self assess and check for understanding.

In this unit, students will learn about electric force. Lessons in this unit include: Charge Interactions Revisited; Coulomb's Law; Inverse Square Law; and Newton's Laws and the Electrical Force. This unit includes videos, animations, and mini quizzes to check for understanding and facilitate learning.

In this unit students will explain the mechanisms for producing electostatic charges by friction, conduction, and induction. Students will review the Law of Conservation of Charge and electron affinity. Lessons in this unit include: Charging by Friction; Charging by Induction; Charging by Conduction; and Grounding-the Removal of a Charge. This unit includes questions at the end of each section to allow students to self assess and check for understanding.

In this activity, students charge a variety of materials by rubbing them together and to examine their interactions with a positive, negative, and neutral object in order to rank the materials according to their relative affinity for electrons. Students will summarize their findings in a formal lab report at the conclusion of the activity.

In this unit, students will learn how to measure the quantity of heat. Lessons in this unit include: What Does Heat Do?; Measuring the Quantity of Heat; and Calorimeters and Calorimetry. This unit includes videos, animations, and mini quizzes to check for understanding and facilitate learning.

In this unit students will learn about thermal energy, heat, and temperature. Lessons in this unit include: Introduction; Temperature and Thermometers; Thermometers as Speedometers; What is Heat?; Methods of Heat Transfer; and Rates of Heat Transfer. This unit includes videos, animations, and mini quizzes to check for understanding and facilitate learning.

In this unit, students will examine the affect of forces acting on angles horizontally and vertically. Lessons in the unit include: Addition of Forces; Resolution of Forces; Equilibrium and Statics; Net Force Problems Revisited; Inclined Planes; and Double Trouble (a.k.a. Two Body Problems). This unit includes videos, animations, and mini quizzes to check for understanding and facilitate learning.

In this unit, students will learn about projectile motion. Lessons in this unit include: What is a Projectile?; Characteristics of a Projectile Trajectory; Describing Projectiles with Numbers; Horizontal and Vertical Components of Velocity; Horizontal and Vertical Components of Displacement; and Horizontally Launched Projectiles- Problem-Solving. This unit includes videos, animations, and mini quizzes to check for understanding and facilitate learning.

In this unit, students will learn how to analyze the motion of objects. Lessons in this unit include: Vectors and Direction; Vector Addition; Resultants; Vector Components; Vector Resolution; Component Method of Vector Addition; Relative Velocity and Riverboat Problems; and Independence of Perpendicular Components of Motion. The unit includes videos, animations and mini quizzes to check for understanding and facilitate learning.

In this unit of study, students will learn about the behavior of waves. Lessons in this unit include: Boundary Behavior; Reflection, Refraction, and Diffraction; Interference of Waves; and The Doppler Effect. This unit includes questions at the end of each section to allow students to self assess and check for understanding.

This online resource provides information about the different types of waves and how waves can be categorized based on distinguishing characteristics. A simple assessment is provided at the end of the text to check student understanding.

In this unit of study, students will learn about properties of a wave. Lessons in this unit include: The Anatomy of a Wave; Frequency and Period of a Wave; Energy Transport and the Amplitude of a Wave; The Speed of a Wave; and The Wave Equation. This unit includes questions at the end of each lesson to allow students to self assess and check for understanding.

In this unit, students will learn how to identify the parts of a wave and the terminology associated with waves including frequency, period, and amplitude. Lessons in the unit include: Vibrational Motion; Properties of Periodic Motion; Pendulum Motion; and Motion of a Mass on a Spring. This unit includes animations and mini quizzes to check for understanding and facilitate learning.

In this unit of study, students will learn about the relationships among work, energy, and power. Lessons in this unit include: Definitions and Mathematics of Work; Calculating the Amount of Work Done By Forces; Potential Energy; Kinetic Energy; Mechanical Energy; and Power. This unit includes questions at the end of each section to allow students to self assess and check for understanding.

In this unit, students will learn how to categorize forces based upon whether or not their presence is capable of changing an object's total mechanical energy. Students will also learn that there are certain types of forces, that when present and when involved in doing work on objects will change the total mechanical energy of the object. Lessons in this unit include: Internal vs. External forces; Analysis of Situations In Which Mechanical Energy is Conserved; and Bar Chart Illustrations. This unit includes videos, animations, and mini quizzes to check for understanding and facilitate learning.