February 2019

Earthquakes occur most frequently at __________?

A. Plate boundaries
B. Plate surface
C. Ocean beds
D. All of the above

P Waves are also said to be __________ waves?

A. Push-pull
B. Side-side
C. Up-down
D. None of the above

In general, the most destructive earthquake waves are the __________ ?

A. P waves
B. S waves
C. Surface waves
D. All of the above

Place directly above focus on Earth’s surface is known as _________?

A. Strike
B. Comma
C. Epicenter
D. Origin

The point within the Earth where earthquakes originate is _________?

A. Comma
B. Origin
C. Epicenter
D. Focus

Magnitude of energy released by an earthquake is calculated using ________?

A. Earthquake scale
B. Seismic scale
C. Richter scale
D. Temblor scale

The ability of the Eye to see in the dark, is due to the production of a purple pigment known as________?A. Carotene
B. Rhodopsin
C. Iodopsin
D. Retinene

Retinene is better known as retinaldehyde or simply retinal and is fundamental in the transduction of light into visual signals in the photoreceptor level of the retina (known as the visual cycle). Retinene is more formally known as dehydroretinaldehyde.