Well...this is Science.

martes, 30 de abril de 2013

How does particles motion affect the properties of solids, liquids and gases?

Ice, liquid water, and the gaseous water in stream are allmade up of the same water molecules. Yet they look and behave differently.

Solids have a definite volume and shape:

The particles in a solid are in fixed positions and are close together. Although the particles vibrate, they cannot move. As a result, a solid cannot easily change in shape or volume. If you force the particles apart, you can change the shape of a solid by breaking it into pieces. However, each of those pieces will still be a solid and have its own definite shape.

Liquids have a definite volume but can change shape:

Like water, all liquids have a definite volume but no definite shape. The particles in a liquid are close together, but they are not tightly attached to one another. Particles in liquids can slide past one another. As a result, liquids can flow.

Gases can change in volume and shape:

Gases do not have a definite volume or shape. The particles in a gas are very far apart. The amount of space between the particles in a gas can change easily.

Lesson 5: States of matter: GAS

A gas does not have a definite volume or shape. Its particles have the most kinetic energy of the three states. They are not as close to one another and can move easily in any direction.
The space between gas particles can increase or decrease with changes in temperature or pressure.

Lesson 5: States of matter: LIQUID

A liquid substance has a definite volume but not a definite shape. Its particles have more kinetic energy and are close together. However, they are not fixed in place and can move from one place to another.

Lesson 5: States of matter: SOLID

All matter is made of atoms or groups of atoms that are in constant motion. This idea is the basis for the kinetic theory of matter.

A solid substance has a definite volume and shape. the particles in a solid are close together and do not move freely. Its particles vibrate but are fixed in place.

Water is an importan excemption to this rule. The molecules that make up ice actually have more space between them than the molecules in liquid water do.

miércoles, 10 de abril de 2013

Well...this is us. And our project.

Hello there.
So, we are Sofía and Lissa. Two students of 9th grade who are obligated to write a blog about science. But it's kind of fun. We guess.
Now, let's get down to business. We are gonna write about:

Pure substances and mixtures
States of matter
Changes of state

Also known as lesson four, five and six from our science book. We were thinking of ending this entry here, BUT apparently our professor does not agree. Let's just say Karma will do its job. 300 pages of pure awesomeness. I know , too cool.