Gases

What are Gases?





Resource:

http://chemistry.boisestate.edu/people/richardbanks
/inorganic/chemistry/gas_animation.gif

 Getting to our last state of matter, which is Gas! Gases are everywhere around us, the most important and obvious is the atmosphere, which the layer of gas that surrounds the Earth. Unlike solid and liquids, gases are random collection of atoms; molecules in gases are spread out and very energetic, moving around continuously. Thus, gases can fill out any size of container it is placed in.

Now let us do this simple exercise, take a balloon and blow it, you realize no matter what you shape you make with the balloon it will be filled with gas atoms evenly. Vapor is another word that is used for gases but usually it is used for the gases out of liquid. One important characteristic of gases is that if applied pressure on it can be compressed, such examples would be a can of soda or spray in a bottle.

Examples of Gases at room temperature are; carbon dioxide, Oxygen, and water vapor.

Questions:


1. Name some of the gases who are thinking of ?



2.Compare between the three states of matter in terms of molecules arrangmenet and hardness?




3.Do you think that gas molecules ate always distrubuted evenly in the atnosphere ?

Solids

What are Solids?



Resource: http://www.sewingupmath.com/multicolor%20platonic%20solids%203.jpg

 The second element of states of matter is Solid. They are known for the hardness and that is because their molecules are crowded together. Solids have their unique and own shape regardless of the container they are placed in. Take a rock as an example; it will always look like a rock unless an external force is applied to it.


Atoms in a solid are placed in a fix position and are not allowed to move around. That is one of the most important characteristics of solids.

 Questions:

1.Which state of matter is known for its hardness and packed molecules?



2.How are atoms arranged in a solid?



3.If a solid is places in a container does it change its shape ?

Liquids

What are Liquids?

Resource: http://video.ecb.org/badger/download/vlc/images/VLC076_Characteristics_of_liquids.jpg

Liquid is one element of the three states of matter. Liquid can flow easily taking the shape of the container it is placed in but does no scatter and disperse to fill every gap of the container. It sustains reasonably a constant density. Having said that, Liquid has a specific volume, but does not have a definite shape. Liquids have certain forces that are cohesive; meaning sticky, forces that hold molecules together

Let us take water as an example, if you pour some water into a cup, it will surely fill up the base first and then filling up the rest of the cup where it takes the shape of the cup. The surface of the water in the cup is flat. But why is that?

Here is the answer for that! It is Gravity! Where gravity plays two major roles in that example, first it is the cause for filling the base first then it causes the flat surface of the water.

Examples at room temperature are water, vegetable oil, ethanol and much more…

Questions:

1. Give two examples of Liquids ?


2.What is Gravity ?


3.What are the other two states of matter?

Introduction

What is Chemistry ?



                                       Resource : http://www.scienceexpress.net/images/Chemistry.jpg

Chemistry is the division of science which examines the characteristics of substances and the transformations they experience when they are merged together. Chemistry is found everywhere around us and is involved in a way with almost all our daily activities. In other words, chemistry plays a major role in our lives chemistry having essential part of modern life. It is the heart and center of science and technology, unifying at one point into physics, engineering and mathematics, and at the other end into the earth and life sciences. While the people who are employed in factories and who provide the people with food, consumer goods, and energy while protecting our health and environment are known as chemists. Chemists are essential members in research institutions supplying new matters and tools for the future.


Questions:

1. Name 3 of your daily activities you think chemistry is involved in?



2. How do you think Chemistry plays a major role in our lives?


3. How can you define chemistry in your own words?

Welcome Note

Hello Class ... 
Are we all ready to learn our first steps to the science world ? We are going to be introduced to the different states of matter.
I hope we willl all enjoy this class, this blog will help us communicate and share material.



States of Matter-Resourse: http://pickettsmill.typepad.com/.a/6a00e5509b3be68834012875a15335970c-800wi