Paul Andersen explains the major elements in the endocrine system. He explains how glands produce hormones which target cells. He differentiates between water-soluble and lipid-soluble hormones. He then describes the hormones and actions of ten glands: pineal, anterior pituitary, posterior pituitary, thyroid, parathyroid, pancreas, adrenal cortex, adrenal medulla, testes, and ovaries. [13:46]

In this video Paul Andersen explains how energy can enter and leave a system. The amount of energy a substance can receive through heating or lose through cooling is measured using the specific heat capacity. Take in the additional concept map, slideshow, and simulation. [8:19]

Paul Andersen explains the different forms and units for energy. A discussion of the laws of thermodynamics is also included. Sample conversion problems using dimensional analysis is also included. Utilize the practice problems and concept map. [8:53]

Paul Andersen explains how humans have consumed energy through history and may consume energy in the future. Sources of energy have included food, animals, wood, wind, coal, oil, and natural gas. However non-renewable energy source eventually lead to an energy crisis as supplies go down or prices go up. [7:51]

Explains how energy flows in ecosystems. Energy enters via producers through photosynthesis or chemosynthesis. Producers and consumers release the energy from food through cellular respiration. An explanation of gross primary productivity and net primary productivity are included. [7:46]

Paul Andersen explains how the law of conservation of energy applies to both energy and mass. Einstein showed that mass and energy are equivalent and that the amount of energy contained within matter can be calculated using the famous equation E=mc^2. [5:22]

In the following video Paul Andersen explains how energy can be transferred from one system to another. In a closed system the energy can be transferred as either work or heat. Thermal energy transfer is know as energy transfer through heat. During energy transfer the energy of the entire system is conserved. [4:49]

Mr. Andersen defines the terms energy, work, and power. He also uses a simple example to calculate both work and power. [3:34]

Paul Andersen outlines the AP Environmental Science course through a video, concept map, and slideshow. He explains how environmental science studies the interaction between earth and human systems. A planetary boundary model is used to explain the importance of sustainability. The importance of science practices and knowledge of the APES format is also included. [9:08]

Paul Andersen explains how acid-base chemistry can be understood in terms of equilibrium. Water is present in all acid-base chemistry and is amphoteric in nature. The Ka and Kb values can be used to determine the strength of an acid or a base. Titrations can be used to student neutralization reactions between strong and weak acids and bases. [10:27]

A video reviewing over how forces are pushes or pulls on an object. Learn how forces can be determined by measuring the motion of an object. Also, how an objects acceleration can show that a force is present. [5:47]

Paul Andersen explains how fossil fuels are formed when organic material is heating and squeezed in an anaerobic environment. Formation, extraction, advantages, and disadvantages are discussed for coal, petroleum and natural gas. [7:57]

In the following video Paul Andersen explains how the gas pressure is the force applied over the area of the container. It is also the change in momentum as gas molecules interact with the container and is uniform throughout the sample. Several problems including pressure, force and area are included. [5:39]

Mr. Andersen explains the concepts of genetic recombination and gene mapping. [9:43]

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Paul Andersen explains how rock is formed and changed on the planet. The video begins with a brief description of rocks, minerals, and the rock cycle. Plate tectonics is used to describe structure near plate boundaries. Hot spots and natural hazards (like volcanos, earthquake, and tsunamis) are included. Find the associated map and slideshow. [11:04]

Find out how the gravitational field strength is directly related to the mass of the object and indirectly related to the square of the distance from the center of mass. [5:38]

Paul Andersen explains how an object with mass placed in a gravitational field experiences a gravitational force. [5:01]

Award-winning science teacher Paul Andersen helps make physics understandable as he explains how gravitational forces differ from the other three fundamental forces: electromagnetic, and strong and weak nuclear forces. [5:05]

Paul Andersen explains how the gravitational mass is a measure of the force on an object in a gravitational field. [6:02]