Picoplankton number 100 million individuals in a liter of seawater at all depths in the ocean. Indicate whether the statement is true or false
ANS: T
Picoplankton have a size range of 0.2 to 2 micrometers. They are also found at all latitudes.
Information can be found in the section Most Phytoplankton are Photosynthetic Autotrophs.
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A considerable variation in seismic wave velocity in the crust occurs because
A) there are different types of rocks in the crust. B) waves move slower the deeper they travel. C) waves move faster the deeper they travel. D) oceans, caves, karst regions, and underground waterways inhibit wave movement.
An electrical signal is delivered to a transducer that changes the signal into a thump on a rock. As the wave travels through the rock, an electric sensor records the signal's travel time. What does this experiment help scientists to calculate?
A) the force of a wave B) the magnitude of a wave C) the effect of a medium on wave travel D) the velocity of a wave
The planets are "wanderers" in the night sky because they move relative to the stars. However, there movement is limited to the plane of the solar system, which is disk shaped
So relative to the celestial coordinate system, how do the planets actually move across the sky? A) They move along the celestial equator. B) They follow wobbling paths related to the precession of equinoxes. C) The move perpendicular to the celestial equator. D) The move along the zodiac.
________ folds have limbs that dip gently and the angle between the limbs is large.
A. Anticlinal B. Domes C. Recumbent D. Open E. Structural