Earth Science c/o precipation and organism/decomposers

Question

1.  precipation is more likely to occur

 

   a.  when the air is saturated

   b.  when condensation nuclei are present

   c.  when warm air rises and cools

   d.  all of these

   e.  none of these

 

2.  in mycorrhiza which organisms benefits

 

    a.  plants

   b.  bacteria

   c.  both a and b

   d.  none of these

 

3.  the energy which drives the water cycle

 

   a.  is supplied by the sun

   b.  is supplied by chemoshynthetic bacteria

   c.  is supplied by the bodies of animals

   d.  is supplied by producers

 

4.  the most fertile type of soil is

 

   a. loam

   b.  silt

   c.  sand

   d.  clay

Answer 1

1) d. All of these

Precipitation is most likely when air is saturated (a), condensation nuclei like dust/salt provide surfaces for droplets to form (b), and warm air rises and cools to its dew point (c). All three favor cloud droplet growth into rain/snow.

2) a. Plants

Mycorrhizae are a mutualism between plant roots and fungi (not bacteria). Plants gain better water and nutrient (especially phosphorus) uptake, so they benefit from the choices given. (Fungi benefit too, but “fungi” isn’t an option.)

3) a. Is supplied by the sun

Solar energy drives evaporation, powers atmospheric circulation, and thus runs the water cycle. Chemosynthetic bacteria and animals are irrelevant to the primary energy input.

4) a. Loam

Loam—a balanced mix of sand, silt, and clay with organic matter—has good drainage, aeration, and nutrient-holding capacity, making it the most fertile overall.