Which Diagram Best Shows the Energy Transformation from Sunlight to Chemical Energy In
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Interactions within Ecosystems
1. Which diagram best shows the energy transformation from sunlight to chemical energy in an organism?
B
2. When a goat eats grass, what form of energy passes directly from the grass to the goat?
A Heat B Light C Electrical D Chemical
3. . In a healthy forest, dead trees and limbs fall to the ground and decompose. Which of these statements best describes why decomposition is important to a forest ecosystem?
A Nutrients are released when wood is broken down. B Worms produce oxygen used by other organisms. C Dead trees provide nest sites for many different species of birds. D Water is stored in dead trees and limbs. 4. In the food web shown above, which organism is a decomposer?
A Rabbit B Eagle C Bacteria D Fox
5. Which statement best describes a likely relationship between the organisms in the food chain shown above?
A If the rabbit population decreases, the wolf population will increase. B If the grass population decreases, the wolf population will remain the same. C If the rabbit population increases, the grass population will increase. D If the grass population increases, both the rabbit and wolf populations will increase.
6. Which process below uses carbon dioxide and the sun’s radiant energy to produce chemical energy?
A Evaporation B Photosynthesis C Respiration D Decomposition 7. The fungi shown in the picture above are decomposers. Decomposers are an important part of an ecosystem because they —
A produce oxygen B provide food for carnivores C break down dead organisms D convert sunlight to food energy
8. What is the original source of energy for all the organisms in the food chain shown above?
A Soil particles B Carbon dioxide C Sunlight D Oxygen
9. A recent study concluded that about 90% of all large predatory fish such as tuna have disappeared from the world’s oceans in the past 50 years. Which of these is most likely the direct cause of this loss?
A Urban development near the coast B Commercial harvesting from the ocean C Climate change on Earth D Acid precipitation over the oceans 10. In the food web shown above, which organism’s food supply would be least affected by a spray that kills large numbers of aphids?
A Tomatoes B Lacewings C Lady beetles D Spiders
11. Glucose molecules contain stored energy for plants. Glucose is made from carbon dioxide and water molecules during photosynthesis. What kind of energy do plants use to make glucose molecules?
A Electrical B Sound C Light D Kinetic
12. A rock quarry was dug to gather valuable granite from within the earth. Before the quarry was dug, the land contained more vegetation. What impact has this change most likely had on the local ecosystem?
A Larger predator populations B A lower number of producers C A greater number of herbivores D A smaller amount of available carbon dioxide 13. In the food web above, which of the following organisms transfer the largest total amount of energy to other organisms?
A Phytoplankton B Seabirds C Fish D Krill
14. A grassland community is pictured above. Grasses are considered —
A secondary consumers B primary consumers C decomposers D producers 15. In the food web above, which of the following organisms feeds on the largest variety of different producers?
16. Which molecule in the equation represents food energy made by plants?
A Carbon dioxide B Water C Glucose D Oxygen