Summary: Organization of Living Things

This ropic is about how the living things are organize. All living things are made up of cells. Cells is the basic unit of life. A group of cells forms tissue, a group of tissues froms organs,

Temperature, Heat, and Matter

Vocabulary #5

Thermal expansion: the expansion
of matter when its temperature is
raised.



Pressure: the force on each unit
of area of a surface.





Freezing: the change of a liquid into a
solid.
Melting: the change of solid into
liquid.





Boiling: the formation of bubbles
of vapor that escape from a liquid
that is being heated.





Evaporation: the vaporization of molecules from the surface
of a liquid.
Vaporization: the change of a liquid to a gas as molecule
 free from each other.
Condensation: the change of a gas into a liquid as molecules
 attract each other.



Vocabulary #4: Temperature and Heat



Kinetic energy: the energy
of a moving object.



             


 Potential energy:  energy stored in 
an object or material. 


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





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





Radiation: the transfer of energy by
electromechanic waves.






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





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







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



Chemical Properties

Vocabulary #3

Compound: a chemical combination
of two or more elements.





Chemical bond: a link that atoms
or electrically charged particle can
form with each other.







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



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



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





Chemical property: a way of decribing how

a subtance changes chemically with other

subtances.







Exothermic: a reaction that gives
out heat.





Endothermic: a reaction that absorbs
heat.



Physical Properties

Vocabulary #1 

Matter: any solid, liquid, or gas.  

       

.Mass: amount of matter in a object. Also a measure of ow hard it is to push or pull and object.

Volume: the amount of space an object takes up.

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

Physical property: a property thet can be observed without changing the identify of a subtance.

Physical change: a change in size, shpe or state without changing forming a  new subtance.

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

Chemical change: a change in matter that produces a new subtance with different properties from the original.

Elements and Atoms

Vocabulary #2




Element: a subtance that cannot be broken down any further
into anything simpler.




Atom: the smallest particle of an element
that has the same chemical properties a the
elememt.
Nucleus: an atom's dense center, where most
of the its mass is.
Electron: a negatively charged particle that
moves around an atom's nucleus.
Proton: a positevely charged particle inside
an atom's nucleus.
Neutron: a particle with no charge inside
an atom's nucleus.



Atomic number: the number of protons in an atom.



Metal: any group of elements that
conducta heat and electricity, is shiny
abd benable.