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Welcome to English for Science and Tecnology blog, where you can find interesting information.

Hello!! I'm Arelis Valdés, I attend English Classes at Aguadulce Extension University in Third level. 

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As you know, English is necessary in all areas for study, meet people, make friends, and why not, to get a well paid job. 

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Learning about 3D Printer

Press-and-print body parts

Last year, Cornell University scientists used a 3-D printer to produce an artificial ear that, according to Randy Reiland’s January 2014 report in Smithsonian.com, “looks and works like the real thing.” Reiland notes that researchers at the University of Pennsylvania and Massachusetts Institute of Technology have bioprinted blood vessels; their counterparts at Wake Forest University developed a method for printing skin cells directly onto wounds. And a company called Organovo has come up with a 3-D printed liver. Next up? 

According to Bernard Meyerson, writing for weforum.com, a 4-D printer is being developed capable of creating products that can alter themselves in response to environmental change, such as heat and humidity. That could be useful for things like clothes and footwear, Meyerson points out, and also for “health care products, such as implants designed to change in the human body.”

Source: Smithsonian.com, Jan. 6, 2014; World Economic Forum, weforum.org, March 4, 2015

Matter: States of Matter

States of Matter
Gases, liquids and solids are all made up of microscopic particles, but the behaviors of these particles differ in the three phases. The following figure illustrates the microscopic differences.

Microscopic view of a gas.	Microscopic view of a liquid.	Microscopic view of a solid.

Note that:

• Particles in a:
• gas are well separated with no regular arrangement.
• liquid are close together with no regular arrangement.
• solid are tightly packed, usually in a regular pattern.
• Particles in a:
• gas vibrate and move freely at high speeds.
• liquid vibrate, move about, and slide past each other.
• solid vibrate (jiggle) but generally do not move from place to place.

Liquids and solids are often referred to as condensed phases because the particles are very close together.

The following table summarizes properties of gases, liquids, and solids and identifies the microscopic behavior responsible for each property.

Some Characteristics of Gases, Liquids and Solids and the Microscopic Explanation for the Behavior
gas	liquid	solid
assumes the shape and volume of its container particles can move past one another	assumes the shape of the part of the container which it occupies particles can move/slide past one another	retains a fixed volume and shape rigid - particles locked into place
compressible lots of free space between particles	not easily compressible little free space between particles	not easily compressible little free space between particles
flows easily particles can move past one another	flows easily particles can move/slide past one another	does not flow easily rigid - particles cannot move/slide past one another

You can complement information about states of matter in the images below, we know it is more practice if you prefer images than text.

Thanks for visit these blog,

it information was found in these web site: https://www.chem.purdue.edu/gchelp/atoms/states.html

Growth: The Stages of Life

   


Once you have analize information above, please, share your opinion, what do you think about stages of life? Do you know what is yor stage? Let me know in comments. Thanks for visit my blog. 

Human Reproduction. We are a miracle!

Human Reproduction. We are a miracle!

After observed with atention the information presented in the previus videos, we can conclude that we are result of something amazing and unimagenable that we can not ignore, we are not alone, we need to feel thanksful for the miracle of life. 


What do you thing? Please, comments are welcomed. Thanks!

The Living Things

Characteristics of Living Things

When you look at the world around you, how do you categorise or group what you see? In science, the broadest groupings are living and non-living. This may sound simple, but it is sometimes difficult to decide whether something is truly alive or not. So why would we say earthworms are living?

All living things share life processes such as growth and reproduction. Most scientists use seven life processes or characteristics to determine whether something is living or non-living.

The table below describes seven characteristics of most living things and contains references to earthworms to help you decide if they are living or non-living.

Further classification

Based on the information above, we can confidently categorise earthworms as living things as they carry out all seven life processes.

It is now possible to classify them further into a series of hierarchical categories: kingdom, phylum, class, order, family, genus and species. Classifying living things into these categories is an important way for scientists to show how living things are related to each other. Most scientists classify living things into one of the following six kingdoms. Which kingdom do you think earthworms belong to?

• Bacteria are single-celled microorganisms that don’t have a nuclear membrane.
• Protozoans are single-celled organisms that are generally much larger than bacteria. They may be autotrophic or heterotrophic.
• Chromists are a diverse group of plant-like organisms and range from very small to very large. They are found in almost all environments.
• Fungi are multicellular and rely on breaking down organic material as they are not able to make their own food.
• Plants are multicellular and autotrophic – they use photosynthesis to produce food using sunlight.
• Animals are multicellular. They are heterotrophic and rely on other organisms for food.

Animal characteristics

Video: Physical adaptations for life underground

What did you decide? Sometimes people are surprised to find out that earthworms are actually animals – the same kingdom as humans, cats, dogs, dolphins and even spiders! Just as there are characteristics of living things, there are also characteristics of animals that can help you to decide whether a living thing is an animal or not.

Key characteristics of animals include the following:

• They obtain energy by consuming other organisms (heterotrophic).
• They are able to physically move their bodies about at one or more stages of their life cycle.
• Their bodies are made up of multiple cells.
• Sexual reproduction, where a sperm and an egg combine to produce a juvenile animal.

 You can find more information on next link:  

http://www.education.vic.gov.au/school/teachers/teachingresources/discipline/science/continuum/Pages/livingthings.aspx