AbSoLuTe DaTiNg

HAVE YOU EVER WONDERED HOW OLD DINOSAURS CAN BE?

scientists have proven that dinosaurs lived over 100 million years ago.

Absolute dating is the process of determining a specific date for an archeological or paleonthologist site or artifact. Absolute dating is usually based on the physical or chemical properties of the materials of artifacts, buildings, or other items that have been modified by humans. Absolute dates do not necessarily tell us when a particular cultural event happened, but when taken as part of the overall they are invaluable in constructing a more specific sequence of events.
Absolute dating contrasts with the relative techniques employed, such as stratigaphy . Absolute dating provides a numerical age for the material tested, while relative dating can only provide a sequence of age.


Atoms are the smallest possible piece of any pure element that still has the properties of that element. Atoms are made of smaller particles including electrons, protons, and neutrons. Differences in the numbers of these particles create the differences between the elements.

Isotopes are any of the different forms of an element each having different atomic mass (mass number). Isotopes of an element have nuclei with the same number of protons (the same atomic number) but different numbers of neutrons. Therefore, isotopes have different mass numbers, which give the total number of nucleons—the number of protons plus neutrons.

How Light Works

1. What Part of the EM Spectrum is Visible Light?

Visible light is only a small part of the EM Spectrum. It is between 400 and 700 nanometers in wavelength.



2.Is light considered a wave or a particle?

It is considered both a wave and a particle.

3. In order for us to see an object, it must be illuminated or luminous.

a. What does it mean to be luminous?

b.What does it mean to be illuminous?

Something which emits light is addressed as luminous. The light referred is generally self-generated. For example: sun is luminous hot body.

4. How fast is light?

Light travels at a speed of 299,792 kilometers per second; 186,287 miles per second.

5. What does light have to do with colors and how we see things?

We see light that bounces off of things around us. When the light enters our eyes, special cells tell our brains about the light.
The visible wavelength colors can be seen when you look at a rainbow. Raindrops acting as natural prisms produce the colors.

6. What are pigments and how are they realated to light?

Pigments are colorful compounds.Because they interact with light to absorb only certain wavelengths, pigments are useful to plants and other autotrophs

7. Light will travel in a straight line until it hits something. Depending on the characteristics of the object, light will be reflected, transmitted, or refracted.

A. What does it mean for light to be reflected?

Objects can be seen by the light they emit, or, more often, by the light they reflect.

B. What does it mean for light to be transmitted?


C. What does it mean for light to be refracted?

When light travels from one medium to another, the speed changes, as does the wavelength.

8.An object can be transparent, translucent, or opaque.

A. What happens when light hits a transparent object? What is an example of a transparent object?

B. What happens when light hits a translucent object? What is an example of a translucent object?

C. What happens when light hits an opaque object? What is an example of an opaque item?