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Worksheetsmodule 3.2
Total questions: 15
Worksheet time: 8mins
What does the First Law of Thermodynamics state?
Energy flows in multiple directions.
Energy can be created and destroyed.
Energy can only be converted from one form to another.
Energy is always lost as heat.
What is the primary process by which plants convert sunlight into chemical energy?
Chemosynthesis
Respiration
Photosynthesis
Decomposition
What is the main reason energy transfer between trophic levels is inefficient?
Energy is only transferred in food webs.
Energy is stored in the soil.
Energy is created during the process.
Energy is always lost as heat.
What is biomagnification?
The increase of energy at lower trophic levels.
The increasing concentration of toxic substances in organisms.
The process of photosynthesis in plants.
The breakdown of organic matter by decomposers.
Which of the following elements is NOT one of the five most common elements in ecosystems?
Carbon
Hydrogen
Oxygen
Calcium
What role do decomposers play in an ecosystem?
They increase the concentration of toxins in the food chain.
They produce energy through photosynthesis.
They break down dead organic matter and recycle nutrients.
They consume other organisms for energy.
What is a food chain?
A method of energy storage in plants.
A cycle of nutrient recycling.
A linear pathway of energy transfer.
A complex network of interconnected food webs.
What happens to energy during transformations according to the Second Law of Thermodynamics?
It is stored indefinitely.
It is lost as heat, increasing entropy.
It is completely conserved.
It is doubled at each trophic level.
What is the primary source of energy for heterotrophs?
Other organisms
Decomposed matter
Inorganic chemicals
Sunlight
How do human activities like mining affect biogeochemical cycles?
They have no significant impact.
They promote energy conservation.
They release excessive amounts of elements, causing pollution.
They enhance nutrient availability.
What is the significance of biogeochemical cycles in ecosystems?
They increase the temperature of the environment.
They ensure the availability of essential nutrients.
They eliminate the need for producers.
They prevent energy loss.
What is the main function of producers in an ecosystem?
To decompose dead matter.
To convert inorganic substances into organic matter.
To consume other organisms.
To release toxins into the environment.
Which of the following best describes a food web?
A complex network of interconnected food chains.
A simple linear pathway of energy transfer.
A method of energy loss.
A cycle of energy storage.
What is the result of energy being lost as heat during energy transformations?
Enhanced growth of producers.
Unidirectional flow of energy in ecosystems.
Decreased entropy in the universe.
Increased efficiency of energy transfer.
What is chemosynthesis?
The conversion of heat into energy.
The breakdown of organic matter by decomposers.
The synthesis of organic compounds using energy from inorganic chemicals.
The process by which plants capture sunlight.
