Z is for Zinc

Zinc is the 30th element on the periodic table. It's standard atomic weight is 65.38, and it was discovered by Andreas Sigismund Marggraf. Zinc is essential to health, zinc deficiency can cause growth retardation, infection susceptibility, and diarrhea in humans.

Y is for Y-Axis

The y-axis is the line on a graph that is vertical. It is used the graph the dependent variables. If you we're to graph the amount of miles a jogger covered, the number of miles would go on the y-axis.

X is for X-Axis

The x-axis is the horizontal line on a graph. This is where the independent variables and time go. If you we're to graph the amount of miles a jogger covers every mile he goes, the time he covers each mile would go on the x-axis.

W is for Waste Reduction

When people choose to take less and use more, it is called wasted reduction. Waste reduction is used to help the environment by taking less resources that nature needs. A common mantra that symbolizes waste reduction is "Reuse, Reduce, Recycle."

V is for Visible Light

The only visible electromagnetic waves we can see are visible light waves. The wavelength for visible light is about 380 nanometers to 740 nanometers. Visible light is between infrared light, which has longer wavelengths, and ultraviolet, which has shorter wave lengths. Some examples of visible light are the sun, and lightbulbs.

U is for Ultraviolet Rays

Ultraviolet light is electromagnetic light. The wavelength is shorter than visible light but longer than x-rays. The sun emits ultraviolet rays.

T is for Terrestrial Habit

A terrestrial habit is a habitat where animals live on land. Trees and mountains are terrestrial habits. Oceans and lakes are not.