Question

lesson summary
primary producers
a key question what are primary producers?
all living things need energy, but no living thing can create energy. organisms called autotrophs capture energy from nonliving sources. autotrophs store the energy in forms that make it available to other organisms, which is why they are also called primary producers. primary producers are the first producers of energy - rich compounds that can be used by other organisms. all life depends on primary producers.
energy from the sun the energy for most life on earth comes from sunlight. algae and plants absorb solar energy through the process of photosynthesis. photosynthesis uses light energy to power chemical reactions that convert carbon dioxide and water into oxygen and energy - rich carbohydrates such as sugars and starches. this process also adds oxygen to the atmosphere and removes carbon dioxide. algae and plants are the main primary producers in most ecosystems.
life without light some bacteria can capture energy from inorganic molecules such as hydrogen sulfide. these bacteria use a process called chemosynthesis (kee moh sin thuh sis), in which chemical energy is used to produce carbohydrates.
visual reading tool: photosynthesis and chemosynthesis
write the names of the reactants and products of photosynthesis and chemosynthesis.

1. describe how autotrophs

Explanation:

Photosynthesis reactants are carbon dioxide and water, with light energy as an input. Products are oxygen and energy - rich carbohydrates like sugars and starches. Chemosynthesis uses chemical energy from inorganic molecules (e.g., hydrogen sulfide) and carbon - containing compounds as reactants, and produces carbohydrates as a product.

Answer:

Photosynthesis:
Reactants: Carbon dioxide, Water, Light Energy
Products: Oxygen, Carbohydrates
Chemosynthesis:
Reactants: Inorganic molecules (e.g., hydrogen sulfide), Carbon - containing compounds, Chemical Energy
Products: Carbohydrates