2023 Cycles of Matter

What is another name for evaporation of water through the leaves of plants?

• Transpiration
• Condensation
• Precipitation
• Percolation

Rain, sleet, snow, and hail are all forms of _____.

• Percolation
• Evaporation
• Condensation
• Precipitation

Which of the following best explains why nitrogen fixation must take place?

• Atmospheric nitrogen is unusable to plants and animals
• Nitrogen must be returned to the atmosphere
• Animals must breathe in nitrogen
• Nitrogen gets "stuck" in the soil and must be untrapped

What is the overall purpose of photosynthesis?

• To use energy from the sun to produce food for the plant
• To use energy from the sun to produce oxygen for animals to breathe
• To break down food in order to produce energy (ATP)
• To break down food in order to produce carbon dioxide

What gas is released by plants from the process of photosynthesis?

• air
• carbon dioxide
• oxygen
• hydrogen

Photosynthesis

• absorbs CO2
• releases CO2

How animals get the nitrogen they need

• from the air they breathe
• from the water they drink
• from the food they eat
• from the Sun

Organism that breaks down dead plants & animals and releases nitrogen back into atmosphere

• bacteria
• plants
• animals
• producers

What is the process that converts nitrogen into a form that can be used by plants and animals?

• Combustion
• Photosynthesis
• Decomposition
• Nitrogen Fixation

How does phosphorus travel through an ecosystem?

• From the soil to producers and then from producers to consumers.

• From the air directly into consumers and then from consumers to producers.

• Phosphorus cannot travel through an ecosystem.

• From the soil to producers and that is as far as phosphorus may travel.