SCIENCES GUIDE ENVIRONMENTAL SECTIONS III,IV SECOND GRADE

CHOOSE THE CORRECT OPTION

Nitrogen fixation

         A ) IS DONE ONLY BY PLANTS

         B) IS DONE MOSTLY BY BACTERIAS.

         C) IS HOW ANIMALS MAKE PROTEINTS.

          D) IS A FORM OF DECOMPOSITION.

 

An área where a glacier has just melted away will begin the process of

A)     PRIMARY SUCCESSION

B)      SECONDARY SUCCESSION .

C)      STABILITY

D)     REGROWTH

The pioneer species on bare rock are usually.

 

A)     FERNS

B)      PINE TREES

C)      MOSSES

D)     LINCHES.

Clouds form in the atosphere trough the process of

A)     PRECIPITATION

B)      RESPIRATION

C)      CONDENSATION

D)     DECOMPOSITION

One of the most common plants in a recently abandoned farm fields is

A)     OAK OR MAPLE TREES

B)      PINE TREES

C)      MOSSES

D)     CRABGRASS

 

 

THESE ARE THE PHASES OF THE PRIMARY SUCCESSION GIVE NUMBERS PER EACH DEFINITION.

 

 

After hunddres ore ven thousands of years, the soil may be deep and stable enought to support a forest  PHASE NUMBER __________________ .

 

Most primary succession begins with linchens acids from the linches begin breaking the rocks into small particles. These particles mix with the remains of dead linches to start forming soil. Linchens  are an example of the pioneer species.

PHASE NUMBER _____________________

 

A slowly retreating a glacier exposes bare rock where nothing lives, and primary succession begins.  PHASE NUMBER _________________________

 

Over time , the soil deepends, and the mosses are replaced by ferns. The ferns ma slowly be replaced by grasses and wildflowers . if there is enough soil, shrubs and small tres

May grow .   PHASE NUMBER _____________

        

              After many years, there is enough soil for mosses to grow. The mosses eventually replace

               The linchens. Insects and other tiny organisms begin to the live there. When they die,     

               Their remains add to the soil.    PHASE NUMBER ___________________

 

                

            GIVE THE NEXT DEFINITIONS.

             SUCCESSION __________________________________________________________

             PIONEER SPECIES _______________________________________________________

             COMBUSTION __________________________________________________________

             DECOMPOSITION _______________________________________________________

             MATURE COMMUNITIES _________________________________________________

              BIODIVERSITY __________________________________________________________

 

EXPLAIN THE ORIGIN AND THE PHASES OF THE SECOND SUCCESSION

 

 

 

 

LIST FOUR PLACES WHERE WATER CAN GO AFTER IT FALLS AS PRECIPITATION.

1

2

3

4

IN WHAT FORMS CAN WATER ON EARTH BE FOUND?

 

 

WHAT ROLE DO ANIMALS HAVE IN THE CARBON CYCLE?

 

 

WHAT ROLES DO HUMANS HAVE IN CARBON CYCLE ?

 

 

WHAT ARE THE FACTS THAT STARTS THE SECOND SUCCESSION?

 

 

WHAT IS THE PERCENT OF NITROGEN ?

 

 

WHAT IS PHOTOSYNTHESIS?

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