Friday, May 28, 2010

Static Electricity


What is Static Electricity?


Everything is made up of tiny parts named atoms. The atoms are made of even smaller parts. The even smaller parts are called protons, neutrons and electrons. The small parts are very different from each other. For example, if we're talking about "charge", Electrons have a negative charge, Protons have a positive charge, while Neutrons have no charge at all...



Static electricity Examples:


Picture 1:


When you take your jacket off, Electrons move from your hair to the jacket. Now each of them items have the same charge, which is positive. Things with the same charge force back each other. So the hairs try to move away from each other. The farthest they can get is to stand up and away from all the other hairs.

Picture 2:

Uses of static electricity:

The Van de Graaff Generator:

the Van de Graaff generator is a device designed to create static electricity which an American physicist, Robert Jemison Van de Graaff, invented n 1931. It can make extremely high voltages which can be as high as 20 million volts!



Picture 3:


In this picture, somebody is being shocked by a doorknob. The shock is caused by static electricity because when you touch a metal doorknob, a spark goes from your fingers to the doorknob which causes an electric shock which is very common.


BrainPop! :- Static Electricity




An example of static electricity is when you get an electric shock walk across a carpet and touch a door knob because electrons move from the rug to you because then you have extra electrons. Everything is made up of tiny parts named atoms. The atoms are made of even smaller parts. The even smaller parts are called protons, neutrons and electrons. The small parts are very different from each other. For example, if we're talking about "charge", Electrons have a negative charge, Protons have a positive charge, while Neutrons have no charge at all. If two things have different charges, they attract, or pull towards each other. If two things have the same charge, they repel, or push away from each other. Static electricity is best described as a one-time shock of electricity, like the electricity from a lightning bolt.






Monday, May 3, 2010

Body Building!

Questions:

1. Do muscles pull or push?
-Muscles only pull. for example; Biceps pull to close space between upper arm and forearm. Then the triceps pull to open the area again.

2. what happens when one muscle of the pair contracts(shortens?)
-The other one relaxes.

3. In what ways is this model accurate?
-It shows how muscles are located in your body specifically.

4. In what ways is this model inaccurate?
In real life muscles contract.

Sunday, April 18, 2010

Brain Pop Movies

Smoking:


Tobacco is the main ingredient of a cigarette. The addictive chemical inside a cigarette is nicotine.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.Tar is a carcinogen that covers a smokers lung. Smoking causes straight away symptoms of coughing and bad breath. emphysema, cancer,and heart attacks are the long term illnesses that are associated with smoking. 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 because they both usually involve the constricting of an interval vessel. The direct cause for an asthma attack is swelling and excess mucous in the airways. Inhalers can help people with asthma overcome their attacks. Living close to a smokestack would be dangerous for people who have asthma. Asthmatics should always carry their inhalers with them. Intense anger and stress can cause an asthma attack too.



How Do Your Lungs Work?:


When you breathe IN :- Your ribs are pulled up and out by your muscles and the Diaphragm is pulled down by your muscles by making the chest volume bigger. You breathe in Oxygen


When you breathe OUT :- Your muscles relax when you breathe out and also your diaphragm releaxes and the chest volume gets smaller and you breathe out Carbon Dioxide.

Respiratory System Worksheet

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

Thursday, April 15, 2010

What to food to look at to decide if it's Healthy, or Unhealthy!



What to food to look at to decide if it's Healthy, or Unhealthy!



To decide if a food is healthy or unhealthy you have to look at the number of calories, fat content, salt content, and fiber. For healthy food, you have to eat fruits and vegetables since they have a low number of calorie, they're also high in fiber, and low fat content, and have no salt content. But to replace this, they are extremely high in vitamins; which are essential for a healthy diet.



The Mouth

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.


Parts of the Digestion System!

The Digestive System : -


Mouth:

1. Mechanical digestion – making food into small pieces easier digest

2. Saliva – chemical digestions carbohydrates sugar

Amylase rice and bread

Slimes, food slide down the esophagus


Esophagus:

Squeezes your food down to stomach.


Stomach:

1. Mechanical digestion – churning food

2. Stores food

3. Chemically digest protein – meat

- Makes acid to help break apart protein (meat)

- Enzyme pepsin


Small Intestine:

Fats – bile from liver/ enzyme lipase

Proteins - finished being digested – pepsin

Carbohydrates – finished being digested enzyme amylase

Digested food protein, carbohydrates, fats go into your blood


Pancreas:

1. Makes all of your digestive enzymes that go into the small intestine

2. Makes insulin which causes your cells to suck up the sugar in your blood


Liver:

1. Makes bile, which goes to the small intestine to help digest fat

2. Filters your blood


Large Intestine (Colon):

  1. . Stores undigested waste food
  2. Absorbs all your water