B.2 Unit 2 Exam - Matter & Energy

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water, and releasing oxygen as a byproduct.

Front

What is cellular respiration?

Back

Cellular respiration is the process by which cells convert glucose and oxygen into energy (ATP), carbon dioxide, and water. It occurs in all living organisms.

Front

What is the role of decomposers in an ecosystem?

Back

Decomposers break down dead organic matter, recycling nutrients back into the ecosystem and transferring energy through the food web.

Front

What is the significance of light energy in photosynthesis?

Back

Light energy is essential for photosynthesis as it drives the conversion of carbon dioxide and water into glucose and oxygen.

Front

What is the relationship between photosynthesis and cellular respiration?

Back

Photosynthesis produces glucose and oxygen, which are used in cellular respiration to produce energy, carbon dioxide, and water. They are interconnected processes.

Front

What are 'dead zones' in aquatic ecosystems?

Back

Dead zones are areas in water bodies where oxygen levels are so low that marine life cannot survive, often caused by nutrient pollution leading to algal blooms.

Front

How do fertilizers contribute to dead zones?

Back

Fertilizers can run off into water bodies, leading to nutrient over-enrichment, which causes algal blooms that deplete oxygen and create dead zones.

Front

What is the importance of regulating fertilizer use?

Back

Regulating fertilizer use helps prevent nutrient runoff into water bodies, reducing the occurrence of algal blooms and protecting aquatic ecosystems.

Front

What is the difference between autotrophs and heterotrophs?

Back

Autotrophs (like plants) produce their own food through photosynthesis, while heterotrophs (like animals) obtain energy by consuming other organisms.

Front

What is the chemical equation for photosynthesis?

Back

6CO2 + 6H2O + light energy → C6H12O6 + 6O2 (Carbon dioxide + Water + Light energy → Glucose + Oxygen)