A. Continental polar air mass C. Continental tropical air mass B. Maritime polar air mass D. Maritime tropical air mass

___ 1. Warm and humid air mass.
___ 2. Warm and dry air mass.
___ 3. Cold and dry air mass.
___ 4. Cold and humid air mass.
___5. Air mass coming from Canada
___6. Air mass coming from Mexico
___ 7. Air masses from the Pacific and Atlantic ocean close to the north pole.
___8. Air masses from the Pacific and Atlantic ocean close to the equator.

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POINT: 40
SCIENCE!

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates

What evidence could be used to convince policy makers to change a shipping lane from going through a whale breeding ground? information on the number of all whale species currently alive information on the number of all whales hit by boats in the given area information on the number of whale deaths in the world's oceans information on the number of whale offspring born every year. (a) scientists could collect and combine data on fish populations all around the world to show that their populations are declining. (b) scientists collect and combine data on fish populations all around the world to show that their populations are increasing. (c) scientists work together and use past data to show that fish populations are becoming locally extinct in some areas. (d) scientists work together and use past data to show that some fish populations are adapting to environmental changes.