Exploring Matter and Energy Flow in Ecosystems

What is an example of an organism in an ecosystem?

• Elk

• Water

• Soil

• Atmosphere

Which of the following is part of the environment?

• Pine trees

• Bacteria

• Grass

• Chemicals in the soil

Tags

NGSS.MS-LS2-3

What do plants take in from the air for growth?

• Water

• Nitrogen

• Oxygen

• Carbon dioxide

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What role do bacteria play in composting?

• They break down waste

• They produce oxygen

• They consume plants

• They create new matter

Tags

NGSS.MS-LS2-3

What do the arrows in a food web represent?

• The movement of energy and matter

• The direction of water flow

• The growth of plants

• The decomposition process

Tags

NGSS.MS-LS2-3

What is the primary source of energy for producers in an ecosystem?

• Carbon dioxide

• Sunlight

• Soil

• Water

Tags

NGSS.MS-LS1-6

What process allows plants to create sugars from water and carbon dioxide?

• Decomposition

• Fermentation

• Cellular respiration

• Photosynthesis

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

In an ecological pyramid, which level generally has the most energy?

• Producers

• Second consumers

• Third consumers

• First consumers

Tags

NGSS.MS-LS2-3

What is the 'ten percent rule' in ecological pyramids?

• Only ten percent of matter is recycled

• Only ten percent of energy is transferred to the next level

• Ten percent of organisms are decomposers

• Ten percent of plants are eaten by consumers

Tags

NGSS.MS-LS2-3

In a temperate grassland, what is the primary producer?

• Mice

• Grass

• Hawks

• Insects

Tags

NGSS.MS-LS2-2