The Strength of a Meteor Shower (That Is, the Number

question 44

Multiple Choice

The strength of a meteor shower (that is, the number of visible meteors per hour) strongly depends on

• A) the current season at the viewer's location.
• B) Earth's velocity.
• C) Earth's proximity to the object that generates the debris.
• D) the thickness of Earth's ozone layer.
• E) the Sun's magnetic activity.

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Definitions:

Photoheterotrophs

Organisms that obtain their energy from sunlight but rely on organic substances for their carbon source.

Photoautotrophs

Organisms that carry out photosynthesis to synthesize nutrients from carbon dioxide and water using sunlight as an energy source.

Chemoheterotrophs

Organisms that obtain their energy by consuming organic molecules created by other organisms.

Vector

In biology, an organism that transmits a disease or parasite from one animal or plant to another. In mathematics and physics, it represents a quantity having both magnitude and direction.