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.

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.

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

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

Newtons Laws Of Psychics

1 - objects in motion will remain in motion unless a force acts on it.

Machine and Force

A machine is something that helps you make a job or chore easier and simpler than it already is. A machine relates to force because a machine makes pushing/pulling very easier than it already is too. For example, you can ride a bicycle without it wheels. It would be pretty hard for you to push yourself on the bicycle without its wheels so the wheels on the bicycle helps force become easier.

22/2/2010

Al-Dana Al-Thani

8D

Worksheet 22/2/2010

Work and Machines

1. What is meant by:

a)doing work:- Using a force to move an object.

b)a machine:- a machine is anything that makes something easy to work with

2.Are you doing work when you are:

a)pushing a mower:- Yes, because when you're pushing the mower, you're using force.

b)cleaning your teeth:- No, because you're not using force to clean your teeth.

c))cycling:- Yes, because when you are pushing down the pedals, you're using force.

d)reading this page:- No, because you're not using force to read this page.

3.Why must you eat if you are going to keep working?

-You must eat if you want to keep working because food gives you energy and if you don't have a lot of energy, you're going to feel tired and maybe even faint.

4.Why are spanners, pilers, and can openers called machines?

-These are called machines because they make the work you do very easy and simpler.

5. Try to find out the names of some other simple machines:-
-Screw (eg.nail)

-Inclined Plane (eg. ladder)

-Wheel&Axle (eg.wheels for bicycles)

-Wedge

-Lever (eg.Hammers)

-Pulleys (ex.bags)

Pulleys, gears, and other wheels

1.What do you need to make a pulley steam?▲

- If you want to make a pulley system, you will need a set of pulley wheels and a rope.

2.Give two reasons why it is easier for a mechanic to lift a car engine out using a pulley system. ▲

-Its easier to lift a car engine out because the machine can pull it out very easily. It can't put it back in because it won't put it in the exact place with at the exact moment.

3. What is the job of:

a) the chain:- the chain turns the wheel and it transmits the force to the back of the wheel.

b) the gears on a bicycle:- the gears change the number of times that the crankshaft turns the wheels.

4. Turning a bicycle crankshaft turns on the back wheel. What is the difference between cycling in high hear and low gear?

-The difference between high gear and low gear is that in high gear, the chain runs over the small cog wheel at the back, but in low gear, the chain now has to run over the large cog wheel at the back.

5. Try to find out some other uses of pulleys:

-A pulley can change the direction of a pulling line.

Building a pyramid

1.Which simple machines were used ▲:
a) to split the blocks:- Wedges

b) to move the blocks:- Flat bottomed, barge like boats

c) to put the blocks in place:- Ramps

2.
a)How was friction reduced when the blocks were moved?▲

- The friction was reduced when the blocks were moved because they need to pull the block up the ramp which caused a lot of friction and they just had to put it in its place.

b) A simple invention, first used 700 years after the Pyramid was built, would have reduced friction further. What is it?

-The crane

3. Draw a diagram to show how to lift a block of stone using lever.

-

4. Wedge shaped tools and ramps are still in use. Give some examples of how they are used:

- They're used in construction sites to lift heavy objects like stones.

5. How much work had to be done to raise the last block(weighing 25,000 N) on to the top of the Pyramid?

- A lot of force had to be used to lift the last block to the top of the Pyramid.

-Al-Dana Al-Thani

Science 8D

Mr. Rhodes

22/02/2010

Force Questions and Answers

What is a Force?
-Force is the physical power or strength by a living being.

Give four examples and explain:-
1. Gravitational (Weight) ex. All objects close to the Earths surface fall toward the surface.
2. Friction (Make an effort to move) ex.Magnets
3. Tension (Moving with rope/string) ex. a rope being pulled by each end
4. Air Resistance (Help with air/wind) ex.Balloon

What units are forces measured in?
-Force is measured in newtons.

What is the equation that is used to calculate a force?
-The equation for calculating force is:-
F= M x A

( Force = Mass (x) Acceleration ).

Erin Brokovitch Picture

This picture relates to the Erin Brokovitch movie because during the Erin Brokovitch movie, the people who drank the toxic/polluted water got sick. Some died and some were saved just before they were going to day. People need to check if the water is fresh or not and see the color of the water before they drink. Or, they can drink bottled water.

Food Web In The Sagebrush-Steppe Ecosystem

1. Who eats ...
a. Plants? -Squirrels, Insects,Pronghorn, other grazers and other small rodents.
b. Snakes? -Raptor and Badger.
c. Insects? -Bats, Lizards and other small reptiles
d. Mountain Lions? No animal eats the Mountain Lion.

2.
- If they shoot the coyote, the effect on the food web will maybe that there's going to be a lot of small reptiles running around.

3.
- The increase effectt on the mountain lions is that maybe the grazaers of the world would be extinct or in danger of being extinct.

4.
- The effect of the Mesquite trees has on the eco system is the efficient of gathering water. The problem is that they take too much watr, that the plants cannot germinate anymore. But, the leaves can be eaten and they are also put into seed pods, which can be eaten by animals. Also, they put nutrients back into the soil.

Van Helmonts Experiment

1.Quantitavie: doing an experiment while measuring stuff.

2. I think that is plants ate soil, this experiment would have weighed a lot more than 90.8 kilograms.

3. This hypothesis was wrong because plants don't eat soil.

4. He tried to control the variables by covering the surface of the soil with a metal plate.

5. The weight would have a large difference because it would have been heavier.

6. The soil maybe got stuck to the roots or something.

7. Water molocules really give plants their weight.

8. I would measure the plants every few months because five years is a very long time going with out measuring the plants.

Plant Questions And Wordle

1. What is a vascular plant?
- Vascular plants have systems of tubes for the transport of nutrients and water.

2. What structures do all vascular plants share?
- Vascular plants share the same structures by having roots, leaves and stems. These are just the basic similarities.

3. What are the roots designed to do?
- Roots are designed to pull water and minerals from whatever material the plant sits on.

4. What are the two jobs of a stem?
- The stem transports food and water to the plant and it acts as support structures to the plant.

5. What is the job of the xylem vessels?
- The xylem vessels job is to transport cells that circulates water and dissolved minerals.

6. What does the phloem transport?
- The phloem transports sugar and other molecules coming from the plant.

7. Inside leaves are organelles (tiny organs) called chloroplasts. Inside chloroplast is a green substance called chlorophyll. What is the job of chlorophyll?

- Chlorophyll can grab the sunlight and start the whole process of photosynthesis.

8. In Photosynthesis, what molecules combine together to form what compounds?
- Carbon dioxide and water combine with light to create oxygen and glucose.

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