Energy Flow in Ecosystems 2.4

Question 1

Radiant energy

Answer 1

comes from the sun (this energy travels through empty space)

Question 2

Thermal energy

Answer 2

energy transferred during heating and cooling

Question 3

About _____ of _______energy is absorbed by the hydrosphere and lithosphere and converted into _____ energy

Answer 3

About 70% of radiant energy is absorbed by the hydrosphere and lithosphere and converted into thermal energy

Question 4

________ energy can keep the earth’s surface warm but organisms can not use this energy to grow and function

Answer 4

thermal energy

Question 5

_________ energy (instead of light energy) is most useful for organisms because it can be stored and released when needed. It is used by all organisms to perform functions such as movement, growth and reproduction.

Answer 5

chemical energy

Question 6

How can some organisms produce chemical energy?

Answer 6

photosynthesis

Question 7

what is the process in which the Sun’s energy is converted into chemical energy?

Answer 7

photosynthesis

Question 8

photosynthesis formula

Answer 8

Carbon dioxide + water 🡪 sugar + oxygen

Question 9

________ are organisms that photosynthesize their own energy rich food

Answer 9

producers

Question 10

Organisms that can not carry out photosynthesis usually have to depend on ______ for food

Answer 10

producers

Question 11

Most producers are ______ plants

Answer 11

green plants (the green color is due to the presence of chlorophyll which captures light energy)

Question 12

examples of producers in a aquatic ecosystem

Answer 12

Algae and cyanobacteria

Question 13

Cellular respiration

Answer 13

Cellular respiration is the complementary reaction to photosynthesis

Question 14

___________ is a chemical process in which energy is released from food

Answer 14

cellular respiration

Question 15

in cellular respiration Sugar and oxygen are rearranged to make _____ and _____

Answer 15

Sugar and oxygen are rearranged to make CO2 and H2O

Question 16

cellular respiration formula

Answer 16

Sugar + oxygen → carbon dioxide + water + energy

Question 17

The energy stored in the sugar is released in cellular respiration. It does not require any light energy for the reaction.

Answer 17

TRUE

Question 18

Some organisms can not carry out photosynthesis so they must obtain their energy and building blocks by eating other organisms (they are CONSUMERS)

Answer 18

TRUE

Question 19

Producers can undergo photosynthesis and cellular respiration

Answer 19

TRUE

Question 20

Consumers only undergo cellular respiration

Answer 20

TRUE