Meteor Showers Occur

question 29

Multiple Choice

Meteor showers occur

• A)at the same times each year.
• B)at random times.
• C)in connection with solar eclipses.
• D)in connection with lunar eclipses.

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Definitions:

Evaporation

The process by which water turns from a liquid into a vapor, often under the influence of heat.

Cohesion

Property of a substance (such as water) that arises from the tendency of its molecules to resist separating from one another.

Osmosis

Diffusion of water across a selectively permeable membrane; occurs in response to a difference in solute concentration between the fluids on either side of the membrane.

Sieve Elements

Living cells that compose sugar-conducting sieve tubes of phloem. Each sieve tube consists of a stack of sieve elements that meet end to end at sieve plates.