Static Electricity

What Is Static Electricity?

Static electricity happens when two objects are rubbed together, this only happens when one object has negative charges and the other has positive charges, and so when rubbed together it creates static electricity. Some examples of when static electricity happens is when wool is on plastic or if the soles of your shoes are on the carpet.

Uses Of Static Electricity

1) Dust Removal - Some appliances such a s air purifiers that can eliminate dust from the air. They use static electricity to alter the charges so that they stick to the filter of the purifier that has opposite charges as well as the dust.

2) Photocopy - They use static to make ink get attracted to the areas where we need information copied. Charges are used to apply ink only to the area where the paper to be copied is darker.

3) Car Painting - To make sure the paint will resist the high speeds and weather to protect the cars metal interior it is applied with static charge.

Body Building

1) Do muscles push or pull?

Muscles pull

2) What happens when one muscle of the pair contracts?

The other one relaxes

3) In what ways is this model accurate?

It shows how our arm bones move

4) In what ways is this model inaccurate?

it doesn't show all our bones

How your lungs work?

- When breathing in or inhaling oxygen your ribs are pulled up and out by muscles. Then your diaphragm is pulled down by muscles making the chest volume bigger.

- When breathing out or exhaling carbon dioxide your muscles start to relax. Your diaphragm relaxes and your chest volume gets smaller.

Brainpop Videos

Smoking:

Tobacco is the main ingredient of a cigarette. NIcotine is the addictive chemical in the cigarrete. Your lungs take in oxygen and take out carbon dioxide. Smokers who try to play sports develop shortness of breathing and cramps. The color of a smoker's lung is more likely to be black because of all the nicotine and chemicals. Cancer,and heart attacks are the long term illnesses that smokers have to deal with. It is difficult to quit smoking because of the nicotine inside the cigarette. Smoking can cause a deadly disease which is lung cancer.

Asthma:

Asthma is a common condition for the lungs. An asthma attack is similar to a heart attack. The direct cause for an asthma attack is swelling and excess mucous in the airways. Inhalers can help people with asthma overcome their attacks because the chemicals in the inhaler make the passage ways to your lungs clear. Living close to a smokestack would be dangerous for people who have asthma. Asthmatics should always carry their inhalers with them because intense stress and anger can cause a asthmatic.  

Respiratory System Workshet

2. Pharynx - Larynx - Trachea - Bronchi - Bronchioles - Alveoli.

3. Esophagus.

4. The hairs in your nasal cavity that push the dirt into the nose. These hairs are called "Cilia".

5.
a) Bronchioles (c)
b) Palate (d)
c) Trachea (b)
d) Alveoli (a)
e) Epiglottis (i)
f) Pharynx (g)
g) Expiration (h)
h) Diahragm (f)
i) Pleura (e)
j) Tidal Volume (j)

6.
B. The muscles between the ribs contract to move the ribs cranially and laterally
D. The diaphragm contracts and flattens
E. The lungs expand to fill up the space created
A. The air pressure in the air tight pleural cavities decreases
C. Air is drawn down the trachea into the lungs

7.
a) True
b) False
c) True
d) True
e) True
f) False
g) True

The Mouth

Saliva begins in your mouth as soon as you smell,taste or even think about food. When you eat food, the saliva breaks down a little bit of the chemicals of the food and make it easier to go through the esophagus. Your tongue helps by pushing the food around while you're chewing with your teeth. When the food is all ready to be swallowed, your tongue pushes a small piece of chewed food, which is usually called bolus, towards the back of your throat and into the opening of the esophagus where the second part of the digestive system process takes place.

Healthy VS. Unhealthy

To decide or see if food is healthy or unhealthy you always have to check the the label to see how many calories or fiber is in that food and you have to check the salt content and fat content. A good example of healthy foods are fruits and vegetables because they have a very low number of calories and high percentage of fiber and they don't have fat or salt content. Their also very healthy because they supply your body with protein and vitamins which is essential to a good diet. A healthy diet is when all your food is balanced like in the food pyramid. An unhealthy diet would be an very high amount of saturated fats, sugars and salts.