Temperature and heat

Kinetic Energy: the energy of a moving object.

Potential energy: energy stoewd in a moving object or material.

Temperature: the avergae kinetic energy of the molecules in a material.

Heat: energy that flows between objects that have different temperature.

 

Radiation: the transfer of energy by electromagnetic waves.

Conduction:  the transfer of energy by direct contact of molecules.

Convection: the transfer by the flow of  a liquid or gas.

Insulation: prevents heat from flowing in or out of a material.+

Chemical Change

Compund: a chemical combination of two or more elements

Chemical Bond: a link that atoms or electrically charged particles can form with each other.

Chemical Formula: a way of using letters and numbers to show how much of each element is in a substance.

Ion: an electrically charged particle with unequal numbers of protons and electrons.

Molecule: a group of bonded atoms that acts like single particle.

Chemical Property: a way of describing how a substances change chemically with other substances.

Exothermic:  a reaction that gives-off heat.

Endothermic: a reaction that absorbs heat.

ELEMENTS AND ATOMS

1. Element: a substance that can´t be broken down any further into anything simpler.

2. Atom: the smallest particle of an element that has the same chemical properties as the element.

3. Nucleus: an atom´s dense center, where most of its mass is.

4. Electron: a negatively charged particle that moves around an atom´s nucleus.

5. Proton: a positively charged particle inside an atom´s nucleus.

6. Neutron: a particle with no charge inside an atom´s nucleus

7. Atomic Number: the number of protons in an atom.

8. Metal: any of the group of elements that conduct heat and electricity, is shiny and bendable.

PHYSICAL PROPERTIES

1. Matter: any solid, liquid, or gas.

2. Mass: the amount of matter in an object.

3. Volume: the amount of space an object takes up.

4. Density: the amount of mass in a certain volume of material.

5. Physical Property: a property that can be observed without changing the identity of a substance.





6. Physical Change: a change in size, shape, or state without forming a new substance.

7. Solution: a mixture of one substance dissolved in another so that the properties are the same throughout.

8. Chemical Change: A change in matter that produces a new substances with different properties from the original.

NEW YEAR 2011

A NEW YEAR FOR BLOGGER AND NEW OPPORTUNITIES OF LEARN SCIENCE. I HOPE THIS YEAR MY BLOG WOULD BE BETTER THAN LAST YEAR.