Earthquakes are caused by:
A. Landslide
B. Eruption of volcanoes
C. Tectonic plates
D. All of these
A. Landslide
B. Eruption of volcanoes
C. Tectonic plates
D. All of these
A. Wine
B. Digestion
C. Kidneys
D. None
A. Mesosphere
B. Ionosphere
C. Stratosphere
D. Troposphere
The sun is made up of 99.9% of ________________ and ______________?
A. Oxygen and Hydrogen
B. Hydrogen and Sulfur
C. Carbon and Silicon
D. Hydrogen and Helium
A. Lion
B. Zebra
C. Dolphin
D. Giraffes
Giraffes do have a larynx (voice box), but perhaps they couldn’t produce sufficient airflow through their 13-foot long (4 meter) trachea to vibrate their vocal folds and make noises. The researchers suspected the reason no one heard giraffe communication was because the sound frequency was too low for humans to hear.
Circadian Rhythm refers to _____________?
A. Planetary movements
B. Formation of galaxies
C. Human body cycles
D. Calisthenics
A. Violet
B. Yellow-Green
C. Green- Blue
D. Red