1. Oxygen A. This is what man needs off.
2. Wood
B. This is what trees gives off.
3. Paper
C. Products made from the fiber of trees.
4. Erosion
D. Slows down the speed of typhoons and
storms.
5.Sugar
E. Extrated from pulp of sugar plant.
6. Rubber
F Derived from the sap of some trees.
7. Lumber
G. Major source of fiber for production of
paper.
8. Carbon Dioxide
H. Product oroduced from the juice of
some trees.
9. Turpentine
I. Root system of trees holds water to
prevent this.
10. Windbreaker
J. Processed wood used to construct
houses.

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia