How air travels through the respiratory system(nose to lungs):

pharynx- larynx-trachea-bronchi-bronchioles-alveoli

Which is the odd one out:

esophagus because its part of the digestive system

Dust particles that are in the air in the respiratory system get out via the nasal cavities hairs-cilia

Smallest respiratory passageway: Broncioles

Separates mouth from nose: Palate

Windpipe: Trachea

Where gas exchange takes place: Alveoli

Stops food going the wrong way: Epiglottis

Air/food pass through: pharynx

Movement of air out of lungs: expiration

Main muscle involved in inspiration: Diaphragm

Membranes that cover the lungs and line the pleural cavity: Pleura

The volume of air inhaledor exhaled at each normal breath: Tidal Volume

Unhealthy and Healthy foods

Unhealthy foods usually contain large amounts of Sodium and Fat (of which is also partially saturated). Foods with empty calories have no vitamins or minerals, or fat, just plain calories, such as the cheetos used in the class for the experiment.

Name all the parts of the digestive system and their functions

Name all the parts of the digestive system and their functions:

Mouth

- Chemical Digestion [Carbohydrates] -> Enzymes

- Saliva Slimes your food so it can easily slide down your esophagus

- Mechanical (Physical) Digestion [Chewing food breaking it into smaller pieces]

Esophagus

- Squeezes the food down to the stomach

Stomach

- Stores Food

- Mixes food (mechanical digestion)

- Makes acid-> in order to breakdown protein

Enzyme pepsin-> breaks down protein ph-2 in your stomach when you get food inside

Small Intestine

- Fats (lipids), carbohydrates, proteins are all finished getting digested

- All of these are absorbed into your blood from your small intestine

Pancreas

- Makes all the important enzymes that go to digest fats, carbohydrates, proteins

Makes insulin in order for your body cells to suck up

Sugar (glucose)

Liver

- Makes bile which is stored in your gall bladder and sent to your small intestine to help digest fat.

- Filters blood from small intestine

- Store sugar, so it can be released

Large Intestine

- Stores undigested food

- Stores water

What is My MYP Grade

My MYP grade for the 2nd term in eighth grade, is 6. I was on the borderline between a 6 and a 7, and got a 6, because I got 32. The science areas I need to improve on are criterion c, meaning I should prepare more for tests, to push myself to a 7 in criterion c. Criterion F should also be worked on, as 4 was the latest grade for that criterion out of 6

Digestive System

Mouth:

-Teeth breakdown food physically for easy digestion.

-Produces Saliva so the food can easily slide through esaphagus

-Produces enzymes (acid like chemical) which help break down food (chemical digestion).

Blog Title: Newton's Three Laws of Motion.

Newton's first law:

Things in motion will keep going until a force such as friction will slow them down until they slow down

Example: If a car was going along a road and its engine was off, the car will eventually stop because of the friction between the road and tyres. If a rocket was pushed into outer space it'll keep going because no force is there to stop it.

Newtons second law:

Things with a heavier mass will accelerate slower than a thing with a lighter mass.

Example: If two skateboards are pushed by the same time and one of them has a load of books on it, the one with no weight will go further.

f=ma Force= Mass x Acceleration

Work and Machines worksheet

13.4 Pg 80

1a) What is work? using a force to move an object
1b) A Machine: Anything which makes it easier to do work

2a) Pushing a Mower: Yes because you use the 'push' force to move the mower.
2b) Cleaning your teeth: Yes because you are using the 'push' force to move the brush around your teeth
2c) Cycling: Yes because you're moving your legs with the pedals and arms when you steer the bicycle.
2d) Reading: No because you're not using a force.

3) Why you need food for using force: Energy to keep your body functioning.

4) How to simple machines help: They help unscrewing nuts, opening cans, cutting wire and lifting cars which are things we would use a lot of energy on but with these machines we only need to use a little force.

5) other simple machines: Wheel/Axle, Nail, Carjack.

Pg. 81: 1-4

1) You need a set of pulley wheels and a rope for a pulley system
2) How does the pulley system easily lift the car engine: Because the pulley system divides the work into seperate ropes so each rope lifts a 100N. Another reason is because now there is a smaller force needed because of the greater distance.

3a) The chain: The chain is used as a rope like that of a pulley, you put the force on the chain it transmits the force to the wheels.

3b) The cycle's gears change the number of times that one turn of the crankshaft turns the back wheels.

4) Low gear helps you climb high places because the crank turns the back wheel once or twice which is enough to keep going up hill.

82 1-5: (TO BE COMPLETED)