03+Serena+Dalton

__ Simple Machines __

**1. What is the height of the inclined plane?** 100m **2. What is the length of the inclined plane?** 3000m **3. What is the mechanical advantage of the inclined plane?** 3000/ 100 = 30 **4. How much effort force would be needed to push the dump truck up the mountain?** 30 J

__**Glossary**__ a device that allows you to do work in a way that is easier and more effective
 * Machine**

The measure of the amount of mater in an object
 * Mass**

The force of gravity of gravity on a person or thing
 * Weight**

How much the speed increases while the object is moving
 * Acceleration**

Exerting a force on an object which causes the object to move some distance
 * Work**

The ratio of output of force to input of force
 * Mechanical Advantage**

The comparison of output work to the input work
 * Effeciancy**

__ The Digestive System __

__Define the function of the following organs__. **Pancreas**: The Pancreas is a multipurpose side attachment to the digestive system which produces 1.3 litres of pancreas juice. Specialised cells in the pancreas produce the hormones glucagon and insulin. These hormones control blood sugar levels.
 * Stomach ** : The stomach is a J shaped organ which can hold up to 2L. Muscles in the stomach wall churn food and mix it with gastric juice
 * Teeth ** : Teeth help break down food to be digested.
 * Large Intestine ** : Lumps of large faeces form in the large intestine eventually being excreted through the anus
 * Liver ** : The liver is the body’s largest internal organ weighing at 1.5kg. The liver produces essential chemicals in over 500 processes in the body.
 * Tongue ** : the tongue tastes and senses the texture and temperature of the food, it manipulates the food under the teeth for chewing, compresses the food forming them into a small lump called a bolus and aids in the action of swallowing.
 * Salivary glands: ** produce small amounts of saliva to keep our mouths lubricated. A reflex stimulates the glands when food is smelled, seen, touched, tasted or even thought about. The saliva consists of a number of enzymes which help break down food; they soften and lubricate the food making swallowing easier.
 * Gallbladder ** : green sac under the inferior surface of the liver. When bile is not needed it will travel and be stored in the gallbladder it can hold around 40ml of bile and continually use water to further concentrate it.
 * Small Intestine ** : The small intestine is the main digestion and absorption site for proteins, carbs and fats using pancreatic juices. The muscular wall uses //peristalsis// knead the food. It is around 500m long and lined with vili for protection, this increases the surface area.
 * Oesophagus ** : the oesophagus forces food down into the stomach through powerful waves of contraction called //peristalsis// along its muscular walls. Food can also be moved up the oesophagus during vomiting.

__ Identify the part of the digestive system. __ A. that produces insulin to control sugar in the blood B. That is lined with villi C. Where faeces are stored before being expelled D. that makes food into a small lump called a bolus
 * Pancreas **
 * Small Intestine **
 * Large Intestine **
 * Tongue **