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 the chemical equation for photosynthesis?

Back

6 CO2 + 6 H2O + light energy → C6H12O6 + 6 O2

Front

What is cellular respiration?

Back

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

Front

What is the chemical equation for cellular respiration?

Back

C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP

Front

What role do decomposers play in ecosystems?

Back

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

Front

What is the relationship between photosynthesis and cellular respiration?

Back

Photosynthesis converts light energy into chemical energy (glucose), while cellular respiration converts that chemical energy back into usable energy (ATP) for living organisms.

Front

What happens to phytoplankton populations in spring?

Back

Phytoplankton populations typically increase in spring due to increased solar energy and nutrient availability.

Front

What is the importance 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 primary pigment involved in photosynthesis?

Back

Chlorophyll is the primary pigment that absorbs light energy for photosynthesis.

Front

What is the difference between autotrophs and heterotrophs?

Back

Autotrophs produce their own food through photosynthesis or chemosynthesis, while heterotrophs obtain energy by consuming other organisms.