A. Oak tree
B. e tree
C. Birch tree
D. Lemon tree
Turpentine (also called spirit of turpentine, oil of turpentine, wood turpentine and colloquially turps) is a fluid obtained by the distillation of resin from live trees, mainly es. It is mainly used as a solvent and as a source of materials for organic synthesis.
The horizontal rows of the periodic table are called ______?
A. Groups
B. Periods
C. Sets
D. Matrices
A. Bat
B. Humming Bird
C. Crimson Sun Bird
D. Cardinal Bird
hummingbird which move back slightly include flycatchers, warblers, egrets and herons using the fluttering method. The only bird which can fly backwards and forward without relying on the wind is the hummingbird.
Infrared waves are used in the night vision apparatus such as night vision goggles.
A. 5,000 to 10,000
B. 10,000 to 15,000
C. 15,000 to 20,000
D. 20,000 to 25,000
The average adult at rest inhales and exhales something like 7 or 8 liters (about one-fourth of a cubic foot) of air per minute. That totals something like 11,000 liters of air (388 cubic feet) in a day.
The air that is inhaled is about 20-percent oxygen, and the air that is exhaled is about 15-percent oxygen, so about 5-percent of the volume of air is consumed in each breath and converted to carbon dioxide. Therefore, a human being uses about 550 liters of pure oxygen (19 cubic feet) per day.
A. Chlorea
B. Plague
C. Diphtheira
D. Tetanus
A. Isotopes
B. Isomers
C. Allotropes
D. Allomers
Atoms which have the same number of protons but different numbers of neutrons in the nucleus are known as isotopes. Because of the difference in the number of neutrons, they will have the same atomic number, but varying atomic mass (or mass number).