EXERCISES AND GAMES

SPEED, VELOCITY AND ACCELERATION

http://www.edu.pe.ca/gray/class_pages/krcutcliffe/physics621/4%20acceleration/4%20acceleration%20review%20problems%20solutions.htm

http://www.physicsclassroom.com/Class/1DKin/U1L6d.cfm

http://testtubegames.com/velocityraptor.html

http://www.rodedev.com/tutorials/gamephysics/

ENERGY

http://ebookbrowse.com/exercises-on-kinetic-and-potential-energy-doc-d46734742

http://www.brainpop.com/games/coastercreator/

With this link you can find good information about all the types of energy

http://my.hrw.com/tabnav/controller.jsp?isbn=0030462495

And you will check out all chapter 9

Also if you want to know the 3 laws of motion of newton´s in the next link

http://my.hrw.com/tabnav/controller.jsp?isbn=0030462495

You will check out chapter 6

Alejandro Castaño O.

This is me left
This is my friend Sebas
We are very good friends we make a lot of works thogether we like the debates and also I like to play football but Sebas dont like it to much but he is a good debater we get good califications but sebas is better than me and I am a fanatic of  FCBarcelona.  Bye  :)


Alejandro Castaño O.

Desinged by Alejandro Castaño O

RENEWABLE RESOURCES AND ENERGY

Using renewable resources energy can be cleaner and non-pollution to be electricity. In this essay we are going to defend the natural-renewable energy also we are gone talk about the good energy and that it not pollute this is good because you can do energy without a lot of money and contamination.

The renewable resources are better because they help the Earth and the people to have the same electricity, but without pollution so they can have pure oxygen and air. Our objective is to help protect the environment and in doing so our children’s future by providing energy from renewable resources. Renewable resources are those that do not deplete with use, for example, solar, wind, wave and biomass.

Renewable energy is energy that comes from resources which are continually replenished such as sunlight, wind, rain, tides, waves and geothermal heat.

                Finally the renewable energy is better because it doesn’t pollute and let a better way of life of the people, we have to make people take into account to use renewable resources to have a better world and life.

http://energyquest.ca.gov/movieroom/index.html

Alejandro Castaño O.

YOU´VE GOT THE POWER

WHY WE SHOULD KEEP ELECTRICITY?

                                              “YOU´VE GOT THE POWER”

A world without electricity would be uncomfortable or even hard for nowadays humans. Electricity is a form of energy, and without energy, nothing will exist, because it is everywhere. Fortunately, humans are so creative, because they can create electricity; also, it is easy to do! But at the same time, we don’t understand that if we don´t take care of it, it will get over and affect the humans and their vital daily necessities.

Everything is useful to create electricity, even natural resources, renewable and non-renewable. However, humans and their bad use of it are getting electricity over. That is why we should conserve electricity by not wasting it. Also, there are common and easy ways to reduce the use in our common life, for example, turning unnecessary lights off, taking shorter baths, not opening so much the refrigerator, and many more easy and simple ways to save energy that is one of the most important things for humans.

In conclusion, it´s time to react and change our bad use of energy and unnecessary waste of this essential resource, because at final, we´ve got the power.

REFERENCE:

http://energyquest.ca.gov/movieroom/index.html

ANALYZING ACCELERATION EXPERIMENT

Analyzing and studying the acceleration, speed and velocity of a marble as a Go-cart in different contexts such as changes in velocity and direction.

Hypothesis: When a marble advance through several points, its velocity decrease, and when a marble changes direction by hitting another object, it decelerates.

Objectives.

__Analyze acceleration in different contexts, such as velocity and direction.

__See if an object accelerates or not if hits something.

__Know how to apply the theory of acceleration in the daily life.

__Learn how acceleration can affect effective and quality of an object.

Materials and Reactives.

- Marble

- Chronometer (Timer)

- A channel or tunnel-like surface.

- Measuring Tape.

- Paper and pen. (To take notes and mark distances)

Procedure.

Measure with measuring tape a distance (optional) in the channel-surface.

Mark the limits and distances.

Throw the marble and start recording the time to see its velocity

Now, mark some distances and get the time when the marble reach it to see its acceleration or deceleration.

Record these results and make some calculations.

Now repeat these steps throwing the marble faster or slower.

Now, in a wall (it has to be in the floor) throw the marble (no in right angle) to see a change in direction.

Take the time it takes the marble to reach the wall and a certain point, to see if it accelerates or decelerates.

Record these observations and make some calculations.

Observations and Results.

In every time we throw a marble in any distance, as it progresses it lose velocity and goes slower.

When a marble hits another object and changes direction, it goes slower or even stops.

If you throw the marble with more impulse it will go faster and last farther or even over pass the solid limit. (Vice versa)

Between more distance there is, less velocity the marble will have as it progresses. (Vice versa)
 

Conclusions

The impulse and distance affects velocity and acceleration of an object.

NEWTON´S LAWS OF MOTION

1^st Law (Law of Inertia) – “An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity, unless acted upon by an unbalanced force” “An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity, unless acted upon by an unbalanced force”

“Inertia is the tendency of an object to resist changes in its velocity: whether in motion or motionless”

Example: “Once airborne, unless acted on by an unbalanced force (gravity and air – fluid friction), it would never stop! Unless acted upon by an unbalanced force, this golf ball would sit on the tee forever”.

2^nd Law – Force equals mass times acceleration: “The net force of an object is equal to the product of its mass and acceleration, or F=ma”    “When mass is in kilograms and acceleration is in m/s/s, the unit of force is in newtons (N)”

 “One newton is equal to the force required to accelerate one kilogram of mass at one meter/second/second”

Example: How much force is needed to accelerate a 1400 kilogram car 2 meters per second/per second?

1. Write the formula

2. F = m x a

3. Fill in given numbers and units

4. F = 1400 kg x 2 meters per second/second

5. Solve for the unknown

6. 2800 kg-meters/second/second = 2800 N.

3^rd Law – For every action there is an equal and opposite reaction. “According to Newton, whenever objects A and B interact with each other, they exert forces upon each other. When you sit in your chair, your body exerts a downward force on the chair and the chair exerts an upward force on your body”

There are two forces resulting from this interaction - a force on the chair and a force on your body. These two forces are called action and reaction forces.

Example: “Consider the propulsion of a fish through the water. A fish uses its fins to push water backwards.  In turn, the water reacts by pushing the fish forwards, propelling the fish through the water”

EXPLORING THE WORLD OF PHYSICS

Go to this page, create an account if you want, and start exploring and getting introduced to the world of physical science:

http://my.hrw.com/tabnav/controller.jsp?isbn=0030462495

ANALYZING VELOCITY AND CHANGES IN MOTION OF TWO MODELS OF SPEEDBOATS IN DIFFERENT CONTEXTS TO SEE WHICH ONE IS BETTER

Colegio Gimnasio Vermont Medellín

STAGE 1

STAGE 2

Science

Seven A (7A)

By

Sebastián Vergara

Medellín, Antioquia

April, 2013

ANALYZING VELOCITY AND CHANGES IN MOTION OF TWO MODELS OF SPEEDBOATS IN DIFFERENT CONTEXTS TO SEE WHICH ONE IS BETTER

Introduction….

Theoretical Background

Click the link to follow the activities step by step: http://my.hrw.com/sh2/sh07_10/student/flash/virtual_investigations/hst/mot/hst_mot_vi.html

Motion:

Everything surrounding us is moving. To detect the motion you need a Reference Point (something that appears to be quiet). When an object changes position over time relative to a reference point, the object is in motion and you can describe the direction of the object´s motion with a reference direction such as north, south, etc.

Speed:

Any time that you move, you get a distance traveled in relation to the time, that is called speed, but if you don´t move, speed is happening and it is equal to 0.

Most of the time, objects do not travel at a constant speed.

Speed could be calculated following the equation:

<!--[if !msEquation]--> <!--[endif]-->Velocity:

Is the speed of an object in a particular direction. The terms speed and velocity do not have the same meaning. Velocity must include a reference direction.

Acceleration:

Acceleration is the rate at which velocity changes. Velocity changes if speed changes, if direction changes, or if both change. So, an object accelerates if its speed, its direction, or both change.

An increase in velocity is commonly called positive acceleration. A decrease in velocity is commonly called negative acceleration, or deceleration.

You can find average acceleration by using the equation:

<!--[if !supportLists]-->1.      <!--[endif]-->Objectives

STAGE 1:

<!--[if !supportLists]-->a)      <!--[endif]-->Analyze a new design for a speedboat.

<!--[if !supportLists]-->b)      <!--[endif]-->Evaluate the speedboat design.

<!--[if !supportLists]-->c)      <!--[endif]-->Make some calculations evaluating the speed and acceleration from the speedboats.

STAGE 2:                                                                                                                                  a)   a) Analyze the acceleration of the speedboats in both currents of a river (upstream and downstream)                                                                                                                                              b)   Identify the data of the boats to fill the chart.                                                                        c)   Decide which boat is better based on all these information and the fuel consumption.

Materials and Reactives

VIRTUAL (BOTH STAGES) 2 models of boats, one old and the other one new. Timer Calculator Fuel PHYSICAL (BOTH STAGES) Computer Paper and Pen to take notes (optional)

Procedure

STAGE 1:

Move the speedboats from Point A to Point B.

Calculate the average acceleration between one point and other.

Record your answer filling the data chart.

Decide which model has the higher average acceleration.

STAGE 2:
 

Click Start to begin the race in downstream.

Click on Gear 2 approaching Point A to change speed.

Click on Gear 3 approaching Point B to change speed.

Fill the chart with your data and calculations.

Repeat the steps 1-4 with upstream direction.

<!--[if !supportLists]-->4.      <!--[endif]-->Observations and Results

TRY YOU THE EXPERIMENT!: http://my.hrw.com/sh2/sh07_10/student/flash/virtual_investigations/hst/mot/hst_mot_vi.html

<!--[if !supportLists]-->5.      <!--[endif]-->Conclusions

<!--[if !supportLists]-->1.      <!--[endif]-->  The more speed you have, the more acceleration will result, the less time you have, the less acceleration will result.

<!--[if !supportLists]-->2.      <!--[endif]-->The new speedboat has the more acceleration.

<!--[if !supportLists]-->3.      <!--[endif]-->A speedboat goes faster downstream.                  

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

SCIENCE FAIR

Our Science fair for this year was about how can a plant could grow better, with artificial light or with sunlight?
Our hypothesis is that the plant could grow better, taller and leafy with the light of the sun, because it provides the plant more nutrients and vitamins that permint a better development of the process of the photosynthesis. 

Follow the link below to see all the information about the topic, procedure, observatiosns, conclusions, etc:
file:///F:/MATERIAS/SEPTIMO/BIOLOGIA/SCIENCE%20FAIR%20PLANTS%20GROWTH.htm

Sebastian Vergara y Alejandro Castaño

INFO ABOUT OUR SCHOOL

 


VERMONT SCHOOL


My school is situated in the town of  "el retiro"  it a good and beautiful school it has a good level of education and I feel very happy of study here. The school is very big and it has exelent and beautiful theings also it has a lot of excellent frineds and teachers  my class is 7A I am in secundary it is hard but I lern a lot also the class of science is interesting and I know a lot of new things.

Alejandro Castaño Osorno.

Chemistry

MATTER AND ITS PROPERTIES

Matter structure and properties

Matter: All surrounding us that have mass and takes up space. Light and sound are not matter. All matter is made up of millions of atoms.

Matter states

1.1 Bose-Einstein It was created by scientists in a lab and it can´t be found in nature. Its particles are packed closer together than a solid´s particle and they vibrate less.
1.2 Solids Have a definite shape and takes up certain amount of space. Particles are packed close together vibrating in place. That is why solids are rigid.
1.3 Liquids Have their own volume but it takes the shape of its container. They can be poured from one container to another. The particles are farther apart. They are able to move a little, so liquids change shape and flow.
1.4 Gases Have not a definite shape or volume. It takes up all the space of its container. The particles are far apart. They move rapidly, always getting farther apart until something stops them.
1.5 Plasma It is produced when electrons get out of the orbits when the temperature is so hot. Particles of plasma are far apart and moving faster than gas´ particles. They produce light.

2.      Properties of matter

There are two main properties that all objects have…

2.1 MASS: Is the amount of matter is there in an object. Mass doesn´t change if the shape of the object changes. Is measured in grams.

2.2 VOLUME: Is the amount of space an object takes up. Is measured in milliliters or cm³.

3.     Physical properties

Physical properties can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter…

Some examples are: Odor, appearance, texture, color, shape, size, solubility, melting point, boiling point, etc.

3.1 DENSITY: Is physical property of matter and it measures how closely object´s atoms are.  Is the relationship between mass and volume.

Density= mass/volume (grams/milliliters)

Mass= density × volume

Volume= mass/density

3.2 MELTING AND BOILING POINT: Are physical properties of matter that describes the temperature at which solid, gas or liquid will change state. Melting point is always lower than boiling point. The pressure affects these physical properties.

Example: Water: 100^oC boiling. 0^oC melting.

3.3 TEMPERATURE SCALES

• Fahrenheit: ^oF- 32 x 5/9= ^oC
• Celsius: ^oC x 9/5 + 32= ^oF
• Kelvin scale: Temperature scale beginning at absolute zero (-273.15°C or -459.67°F). there is no more before absolute zero.

4.      Physical changes

A change in state is a physical change, a change in which the substance itself is still the same substance. Its form changes, but its chemical makeup or composition doesn’t. Matter is not lost in these changes…

4.1 Freeze: when a liquid turns into a solid by the cold temperature.

4.2 Melt: when a solid turns into a liquid by the hot temperature.

4.3 Boil and evaporate: when a liquid turns into a gas by the hot temperature.

4.4 Condense: when a gas turns into a liquid by meeting with something 

5.      Chemical properties

Chemical properties describe an object´s ability to change into another substance or change its chemical composition…

5.1 COMBUSTIBILITY: Measures how easily a substance will burn or combine rapidly with oxygen.

5.2 REACTIVITY: Is the ability of a substance to go through a chemical change or reaction.

6. Chemical changes

When one substance changes and results into other substance or substances is called chemical change. When the chemical composition of an object changes, when the color change indicates there is a change. Chemical changes doesn´t create new matter, just new substances…

6.1 Burning: when an object is subjected to fire, it changes its chemical composition, for example, wood when burns it changes to ash.

6.2 Corrosion: when iron combines with oxygen in the air, rust forms. The rust is a brand new substance. It’s a combination of iron and oxygen with properties different from either of them.

More examples of chemical changes are: Mixing chemicals, cooking some types of food, mixing some ingredients, digesting food, explosions, in the photosynthesis, etc.

Follow the next link for an activity: http://my.hrw.com/sh2/sh07_10/student/flash/virtual_investigations/hst/mat/hst_mat_vi.html

Follow the next link for the solution of the activity:
file:///F:/MATERIAS/SEPTIMO/BIOLOGIA/VIRTUAL%20LAB%20REPORT%20II.htm

History of Taxonomy

http://www.slideshare.net/slideshow/embed_code/16491280

TAXONOMY

1.    Write the procedure to classify an animal or a green plant.

There are several methods of classify organisms: Autotroph and Heterotrophs, Multicellular and Unicellular, Dichotomous Keys, Cladograms, Binomial Nomenclature. To use the Binomial Nomenclature, developed by Carl Linnaeus, you use: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

2.    What is the function of taxonomy?

Categorize organisms by descriptions, features and names in a hierarchical order, permitting differentiate and group organisms one from another, setting and identifying a natural relationship between them. 

3.    Who developed the taxonomy strategies to classify the living things?

First developed by Shen Nung in China, passing to the Greeks like Aristotle, Plato, Plinius, Theophrastus, etc., until get to the 14 and 15 centuries with Carolus Linnaeus and the Binary system, and the one that we use now, modified by other modern scientists and getting a combination of all theories and methods gave since the beginning to the end.

4.    Set the five kingdoms of the nature.

The 3 domains are: Eukarya (cell with nucleus), Archae (bacterias from the prehistory that resist extreme conditions) and Eubacteria (common bacterias)

The 5 kingdoms are: Bacteria (unicellular prokaryote), Protista (unicellular eukaryotes), Animalia (multicellular heterotrophs), Plantae (multicellular green autotrophs) and Fungi (multi and unicellular heterotrophs decomposers)



Follow the link to do an activity about taxonomy: http://www.glencoe.com/sites/common_assets/science/virtual_labs/E07/E07.html