The small Intestine
The first section of the small intestine is involved in digestion. The second section is involved in absorption.Structure of Small Intestine - It is approximately 6 metres long. This provid...
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The first section of the small intestine is involved in digestion. The second section is involved in absorption.Structure of Small Intestine - It is approximately 6 metres long. This provid...
Digestion Most of our food is digested in the small intestine. The first section of the small intestine produces many digestive enzymes. Two other organs the pancreas, and the liver, releas...
The stomach is a muscular bag that is lined with a thick layer of mucus to prevent acid and digestive enzymes from damaging the stomach wall. It has two special muscles. One is at the entran...
Kinetic energy: the energy of movement 1. Motion energy: is the energy of a moving object e.g. a moving car 2. Heat energy: causes particles to vibrate. We feel this as a change in temperat...
Potential Energy: Stored energy 1. Gravitational potential energy: is the energy stored in raised objects, for example, a rolar coaster at the top of a hill. 2. Elastic potential energy: is...
Energy can be changed from one form to another. When this happens some of the energy is useful and some of the energy is not useful, it does not carry out what it was intended to do. This en...
Energy is often wasted due to heat loss and friction. It is possible to improve the efficiency of a device by reducing the amount of friction or energy lost as heat.Reducing Friction An eng...
New houses or houses that are being sold or leased must have a Building Energy Rating (BER) This tells us about the energy efficiency of the house. An 'A' rating means that the house is ver...
Energy is the ability to do work. Energy is measured in joules.Earths primary energy source - The Sun The sun is the primary source of energy for Earth. It provides us with light and heat ...
Food is broken down into smaller pieces. using the teeth. An adult has 32 teeth. There are four types of teeth: 1. Incisors - Incisors are the sharp teeth at the front of your mouth which ...