Phthalates

PHTHALATES

1. What are phthalates?

-They are additives used in plastic products that increase flexibility,durability and transferency.

2.Where can we find them?

-We find them in common flexible plastic products.

3.Are they dangerous? Why?

-They are very dangerous because, although they are part of a plastic, they can easily escape and get our bodies. We can find them in products that are very close to our lifes: babies toys, cosmetics, food containers,...

4.What are the two young scientists trying to do?

-They are trying to give a solution to the accumulation of plastics. There is too much plastic waste and it will take hundreds of years until it is degraded. Their idea is to break plastics down with bacteria instead of waiting so many years.

5.Give your opinion about their work and their achievements.

-I love people that are so enthusiastic and don´t mind to experiment and take risks. There is a big and important problem all over the world with waste and plastic in particular. The idea that bacterias can break down plastic is very interesting and if it works it can be a solution for all of us.

6.What is an accident? Is always a bad thing? Give some examples of positive results from accidents.

-We usually consider an accident as a harmful, unfortunate and even dangerous situation. But they are not always like that.

-There are many examples where accidents have given the opportunity to know and discover something new.

1. Alexander Fleming discovered the penicillin by accident,and we know a lot about bacterias thanks to him.

2. Percy Spencer, an engineer, was known as an electronics genius.In

1945,Spencer was fiddling with microwave-emitting magnetron when

he felt a strange sensation in his pants.So because of this he figured it

out and i invented a microwave-oven.

3. A Swiss engineer,George de Mestral,was out for a hunting trip with his dog.

He noticed the annoying tendency of burrs to stick to its fur.Later,looking under a microscope,Mestral observed the tiny "hooks" that stuck burrs to fabrics and furs.Mestral experimented for years and inventedVelcro.

MY KNOWLEDGE ABOUT MECHANISMS

·Simple Machines: The simple machines are mechanical objects that helps us    change direction or magnitude of a force. 

There are 6 types of simple machines which are; 

- Lever: consists of a rigid bar or beam that is allowed to rotate or pivot about a fulcrum.

- Wheel and axle:consists of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transfered from one to the

other.

- Pulley: is simply a collection of one or more wheels hich you loop a rope to make it easier to lift things.

- Inclined plane:is a flat supporting surface tilted at an angle, with one end higher than the other, used as an aid for raising or lowering a load

- Wedge:is used to separate two objects or portions of an object, lift up an object, or hold an object in place.

- Screw:is a mechanism that converts rotational motion to linear motion, and a torque to a linear force.

·Simple Machines i use in my dialy life

We all do work in our daily lives and we all use simple machines every day.

I normaly use these 4 simple machines that is the fridge,microwave,dishwasher and the oven.

·Transmission of movement

1.Linear motion: moving one way in a straight line

2. Reciprocating motion: moving backwards and forwards in an aro

3. Oscillating motion: moving backwards and forwards in an aro

4. Rotary motion: moving in a circle

Rack and Pinion

Gears are used to turn rotary motion into linear motion.

The pinion is turned to move a flat gear.

Worm drive and worm wheel

It changes the direction of rotation through 90º. The worm drive has only one tooth so it rotates faster than the worm wheel.

Bevel gears

It changes direction of rotation through 90º. The teeth are angled at 45º so the gears fit together at right angles.

·Mechanisms

Is a device designed to transform input forces and movement into a desired set of output forces and the movement.

· Cams

Is a rotating or sliding piece used especially in transforming rotary motion into linear motion or vice versa.

· Gears

Gears are wheels with teeth that can either increase the speed of a machine or its force,but not both at the same time.

·Pulleys

The pulley is really a wheel and axle with a rope or chain attached. A pulley makes work seem easier because it changes the direction of motion to work with gravity.

·Uses of mechanisms in our daily lifeThe mechanisms that i use in my daily life are:

1. The Bicicle: The mechanism that the bicicle uses is called GEARS.

The gears does the function of rotating the wheel so we can move.

2. The Car:In the engine there is a gear that allows the engine to function and a us to drive the car.

·Personal Interests

My personal interest and hobby is Music. I have my own drum set and drum room. I have been playing drums since i was the age of 7 as i liked it that much. I have only been 2 years in a drum school as i want to from my own band.

PRESENTATION ABOUT ME

Hi my name is Adam,im 15 years old and i live in a turism town called SaComa.

Tecnology is one of my favouruite subjects i love doing things on the computers, such as Powtoons ¡They are great!

In Tecnology clases we started doing a powtoon of our favourite inventions,things we would have liked to discover now and in the future and what do we think tecnology is about.

I have enjoied doing this work on the powtoon because we get to desing our slides the way we want.

MYPOWTOON