Showing posts with label for. Show all posts
Showing posts with label for. Show all posts
Wednesday, March 18, 2015
WHAT IS CHEMICAL ENERGY FOR KIDS
Have you ever been to a display of chemical energy?
You probably have, but you called it something else. At a display of chemical energy, there are usually many different colored lights and a lot of noise.
Rockets shoot up into the sky.
Firecrackers make loud bangs.
Pinwheels spin around very quickly.
Stars shoot out of Roman candles.
Yes, fireworks use chemical energy.
Fireworks are made of a special exploding powder called gunpowder, as well as other explosive chemicals. These chemicals contain lots of energy. When gunpowder burns, it releases large amounts of different gases. These gases are released at great speed. So the energy escapes quickly and with lots of noise into the air. The colored lights of the fireworks are made by burning other chemicals.
When a firework has finished burning, all that is left inside is some black powder which does not burn. The high-energy chemicals in the gunpowder have been changed into high-energy, moving gases.
These gases have created kinetic energy of motion and sound. The change that takes place inside the firework is called a chemical change.
There are many more examples taking place all around you. Car engines use chemical energy, too. High-energy molecules of gasoline are burned inside a car engine. The gasoline molecules turn into gas molecules that produce kinetic energy.
Chemical energy can also be produced without burning. Animals and humans use chemical energy in food. They use the chemical energy to work and keep warm. Light energy from the sun can also be changed into chemical energy.
This happens when sunlight reaches the leaves of plants.
The plants trap this energy and use it to make a special substance called glucose. The glucose contains chemical energy. Living things can get energy from glucose.
Car engines run on a mixture of gasoline and air. When this mixture comes into contact with an electric spark, heat energy and kinetic energy are produced.
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You probably have, but you called it something else. At a display of chemical energy, there are usually many different colored lights and a lot of noise.
Rockets shoot up into the sky.
Firecrackers make loud bangs.
Pinwheels spin around very quickly.
Stars shoot out of Roman candles.
Yes, fireworks use chemical energy.
Fireworks are made of a special exploding powder called gunpowder, as well as other explosive chemicals. These chemicals contain lots of energy. When gunpowder burns, it releases large amounts of different gases. These gases are released at great speed. So the energy escapes quickly and with lots of noise into the air. The colored lights of the fireworks are made by burning other chemicals.
When a firework has finished burning, all that is left inside is some black powder which does not burn. The high-energy chemicals in the gunpowder have been changed into high-energy, moving gases.
These gases have created kinetic energy of motion and sound. The change that takes place inside the firework is called a chemical change.
Chemical change
Fireworks are just one example of a chemical change.There are many more examples taking place all around you. Car engines use chemical energy, too. High-energy molecules of gasoline are burned inside a car engine. The gasoline molecules turn into gas molecules that produce kinetic energy.
Chemical energy can also be produced without burning. Animals and humans use chemical energy in food. They use the chemical energy to work and keep warm. Light energy from the sun can also be changed into chemical energy.
This happens when sunlight reaches the leaves of plants.
The plants trap this energy and use it to make a special substance called glucose. The glucose contains chemical energy. Living things can get energy from glucose.
Car engines run on a mixture of gasoline and air. When this mixture comes into contact with an electric spark, heat energy and kinetic energy are produced.
Sunday, March 15, 2015
Images for CAD
Recent infarct with Perforation.
LV aneurysm with Thrombus.
Pale area in recent Infarct.
Raptured papillary muscles in Recent MI.
Recent Infarct with huge Mural Thrombus.
Old Infarct.(its a firm Scar)
Monday, March 9, 2015
A Modern Approach For Teachers to Resolve Unfinished Lessons
A Modern Approach For Teachers to Resolve Unfinished Lessons
One of the most common problems encountered by teachers from all subject areas is the inability to finish all the lessons in a year due to various reasons such as school activities and programs; calamities such as floods, flash floods, typhoons, earthquakes and many others. One of the most notable implications of this is the students’ low performance in RAT, NAT and other related assessment examinations.
If you are having problem finishing all your lessons before the end of each grading period or before the end of the school year, you must conceptualized and create a modern approach in resolving it. Since Internet is the fastest way and the widest source of information, it can be utilized as a solution to the problem. A practical and innovative approach should be applied by every teacher to address the problem. One approach I thought that could resolve or minimize the problem is the implementation of a so-called “FACEBOOK KO, PANOORIN MO
This approach will be conducted by posting on Facebook a power point presentation of all the last lessons that are not usually tackled due to the above-mentioned reasons.
Teachers in a particular subject in a particular year level should collaborate in producing or creating the power point presentation or mini-film. The effectiveness of this approach is more likely successful if the school has its own Audio-visual room or Computer laboratory with internet access. Without these facilities, the teacher must produce his/her own Laptop equipped with either Globe tattoo or Smart broadband so that this approach can be realized. For the students who are not able to view the power point presentation published on Facebook can still access it through internet cafés available in the community. An evaluation at the end of the show will be accomplished by the students.
Through this approach, lessons for 3-5 days can be shown in a minimum of one hour or less, thus, covering all the lessons which are not usually taken due to the above-mention factors. In addition, the presentation should be break down into segments with proper evaluation/assessment for each segment.
If this approach is properly implemented, students will have better and higher performances in assessment examinations such as RAT (Regional Achievement Test) NCAE (National College Assessment Examination), NAT (National Achievement Test) and others.
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