Question: The altitude of a location is its vertical distance above sea level. How does altitude
affect phase changes?
1. Form a hypothesis: As altitude increases, the air pressure decreases. How do you think the lower
pressure will affect the following? (Circle your answers.)
A
Freezing point:
Increase
Stay the same
Decrease
B. Melting point
Increase
Stay the same
Decrease
C. Boiling point
Increase
Stay the same
Decrease

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

answer: a) a compound microscope has a greater magnification ability than a simple microscope.

explanation:

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