Photosynthesis
What do plants need for photosynthesis?
Sunlight, Carbon dioxide, and water
Where does cellular respiration occur in cells?
In the mitochondria.
What is energy flow in an ecosystem?
The transfer of energy from one organism to another.
What is evaporation?
The process of water turning into vapor.
What gas makes up most of the atmosphere?
Nitrogen (about 4/5)
The leaves
What is the main purpose of cellular respiration?
To convert glucose into energy (ATP).
What are the three main trophic levels?
Producers, consumers, and decomposers.
How do plants contribute to the carbon cycle?
They absorb carbon dioxide during photosynthesis.
How do animals contribute to the oxygen cycle?
By breathing in oxygen and releasing carbon dioxide during respiration.
What is the main product of photosynthesis?
Glucose (sugar)
What is the equation for cellular respiration in symbols?
C_6H_{12}O_6 +6O_2 right arrow 6CO_2 + 6H2O + energy(ATP).
Give an example of a primary consumer.
Herbivores like rabbits, deer, and squirrels.
What is precipitation?
Any form of water that falls from the atmosphere (rain, snow, sleet, hail).
What role do oceans play in the oxygen cycle?
They produce a significant amount of the world's oxygen through phytoplankton.
Oxygen
What do cells produce as waste during cellular respiration?
Carbon dioxide and water.
What role do decomposers play in an ecosystem?
They break down dead organisms and recycle nutrients.
What human activity contributes significantly to the carbon cycle?
Burning fossil fuels.
What is denitrification?
The process of converting nitrates back into nitrogen gas.
What is the equation for photosynthesis in symbols?
6CO_2 + 6H2O + light right arrow C_6H_{12}O_6 + 6O_2
How is cellular respiration related to photosynthesis?
They are opposite processes; photosynthesis produces glucose and oxygen, which are used in cellular respiration.
What happens to energy as it moves up trophic levels?
It decreases; only about 10% is passed on to the next level.
It helps to regulate climate and distribute heat around the planet.
Why is the oxygen cycle crucial for life on Earth?
It ensures a constant supply of oxygen necessary for the survival of most living organisms.