Earth science - units 13-14 test plz

1. is constantly changing, and it refers to the state of the atmosphere at any given time.
a. climate
b. weather
c. humidity

2. which of the following makes up the largest portion of the atmosphere?
a. nitrogen
b. oxygen
c. water vapor

3. in what way do humans contribute to airborne pollution?
a. driving cars
b. energy production
c. industrial processes
d. all of the above

4. which layer of the atmosphere is the layer that surrounds earth and that weather occurs in?
a. troposphere
b. mesosphere
c. stratosphere

5. the spinning of earth on its axis is called .
a. revolution
b. rotation
c. precession

6. the of earth causes seasonal variations in the northern and southern hemispheres.
a. rotation
b. tilt
c. precession

7. what type of heat transfer causes circulation within a fluid as the air or liquid rises when it warms and sinks as it cools.
a. conduction
b. convection
c. radiation

8. which heats faster, land or water?
a. land
b. water

9. which of the following can affect the temperature of an area?
a. altitude - how high up the location is
b. geography - how close it is to water or mountains
c. latitude - how far north or south of the equator it is
d. all of the above

10. (2 points) what two factors can affect humidity? pick two
a. increasing the air pressure
b. change in temperature
c. changes in wind direction
d. adding or removing water vapor

11. what must be present for water vapor to condense to form a cloud?
a. precipitation
b. mountains
c. condensation nuclei

12. orographic lifting involves that act as a barrier to air, causing it to rise.
a. a cold front
b. a pocket of warm air
c. mountains

13. what causes surface wind?
a. differences in air pressure
b. rotation of earth
c. friction

14. what type of pressure center is associated with bad weather?
a. high pressure
b. low pressure

15. what type of air mass is characterized by low moisture and warm temperatures.
a. maritime tropical
b. maritime polar
c. continental tropical

16. which of the following are considered to be the most powerful storms on earth?
a. mid-latitude cyclones
b. tornadoes
c. hurricanes

plz you

Where is energy trapped inside the organelle chlorophyll

What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.

For your initial isolation of the bacterium, you simply needed to grow enough of it that you could identify some of its more general features. thus, you used a complex nutrient agar that would allow for the growth of almost any bacterial species. different bacterial species often have very specific requirements for life. this is a fact that you can utilize when you are trying to identify the bacterium to the species level. growth conditions that will permit the growth of one species but not another may allow you to select which one you would like to culture. you can utilize different selective/differential media that allow for the growth of only one type of bacteria (e. g., either gram positive or gram negative). culturing media such as phenylethyl alcohol or sodium chloride agar will be selective/differential for gram-positive bacteria. you may also want to show that it is different from other bacteria that may be present, so you could use a selective/differential agar. selective/differential media such as blood agar or phenol red sugar broths allow for the determination of whether a bacterial cell can grow and utilize specific ingredients included in the medium and turn the agar a distinct color. sheep's blood agar utilizes red blood cells to differentiate which bacterial species may have hemolytic properties. selective or differential? 1. an agar that uses a high salt concentration to limit the growth of one type of bacteria over another would be considered selective/differential. 2. if an agar contains a dye or ph indicator in the presence of a sugar, it is generally considered selective/differential for those bacteria that may ferment the sugar over those that cannot. 3. an agar that uses the dye in crystal violet agar suppresses the growth of gram-positive bacteria. this agar would be considered selective/differential. 4. the selective/differential aspect of macconkey agar allows for the determination of which bacteria are lactose fermenters and which are not. 5. a blood agar plate contains sheep red blood cells and allows for the determination of hemolytic capabilities for all bacteria that grow on the agar. this would make this type of agar selective/differential. 6. emb agar uses lactose and two dyes that allow it to be selective/differential between the blue-black colonies of e. coli and the pinkish colonies of all other enteric bacteria. 7. bile salts in macconkey agar allow for the agar to be selective/differential for the growth of enteric gram-negative bacteria over gram-positive bacteria. 8. an agar that allows for the distinction of bacteria based on metabolism would be considered selective/differential.