Science 10 Ecology Quiz #3

Science 10 Ecology Quiz #3

____ Name______

12

1. Circle the best answer for the following questions. (2 marks)

i)  How do pesticides like DDT enter a food chain?

a) through the air b) through the water c) through the skin

ii)  Which organisms have the most pestcides in their bodies?

a) producers b) primary consumers

c) secondary consumers d) teritary consumers

2. Fill in the blanks with the word or words that make the statement true and

complete. A word bank is given but not all the words will be used. (5 marks)

Word Bank

abiotic biotic calcium carbon chlorine closed combustion decomposition helium hydrogen nitrogen open oxygen ozone phosphorous photosynthesis potassium recycled replaced respiration sodium silicon sulphur

a)  The six most important elements required for all living organisms to build and operate cells are ______, ______, ______, ______, ______, and ______.

b)  Earth has all the nutrients it needs to sustain life for millions of years but these nutrients must be constantly ______from the ______and ______parts of the ecosystem to maintain life.

c)  Earth is considered a ______system because no matter can enter or leave the system.

3. Circle the correct word(s) to complete the following statements. (5 marks)

a) Carbon dioxide and water are the (reactants/products) for cellular respiration.

b) Energy is stored in the form of (oxygen/carbon dioxide/carbohydrate).

c) The reactants of Photosynthesis are the (reactants/products) of cellular

respiration.

d) Photosynthesis is done by (producers/consumers/producers and consumers).

e) Cellular respiration is done by (producers/consumers/producers and consumers).