NBC 5 Flow of Energy

Analyze the positions of the hawk and the snake in the food web pictured above. Which of the following statements is correct?

• The hawk eats more types of organisms in the food web than the snake does.

• The eagle eats the same types of organisms as the snake does.

• The snake eats more types of organisms in the food web than the eagle does.

• The snake is eaten by the same types of organisms as the eagle is.

Analyze the positions of the plants and the animals in the food web pictured above. What type of impact could occur if there were a sudden decrease in the snake population?

• There would be a decrease in the number of shrews, rabbits, and mountain lions.

• There will be an increase in the number of rabbits and shrews.

• There will be a decrease in the number of cacti and sagebrush plants.

• The mountain lion population will increase.

Use the grassland food web above to answer the following question. How is this ecosystem MOST likely to be affected by an increase in the number of rabbits?

• The amount of grass will increase.

• There will be more food for mice.

• The number of hawks will decrease.

• There will be more food for snakes.

Using the food web pictured, how many energy levels would be drawn in an energy pyramid?

• 5

• 6

• 3

• 4

What type of energy is required to begin the process of photosynthesis?

• chemical

• heat

• radiant

• mechanical

How does energy flow through ecosystems?

• energy is passed from one organism to the next as an organism is eaten.

• the sun passes all energy to all levels

• energy flows regardless if the animal or plant is eaten

• energy is transferred to all organisms no matter who eats what

Tags

NGSS.MS-LS2-3

Energy stored in foods is _____________; digested food releases ___________ energy for movement and ______________________ energy as heat.

• chemical, mechanical, thermal

• radiant, thermal, mechanical

• heat, mechanical, thermal

• mechanical, thermal, chemical

Which food web would BEST represent the flow of energy for the following feeding relationships? (draw it)

1. Insect larvae feed on white spruce (it's a tree)
2. Shrews and snowshoe hares (rabbits) are prey for lynx, red-tail hawks, and red foxes.
3. Snowshoe hares eat both willows (a tree) and white spruce (tree)
4. Shrews eat insect larvae
5. Red foxes sometimes eat insect larvae

• 
• 
• 
• 

The equation above describes the chemical reaction that occurs during photosynthesis. What happens to the light energy that is shown in the reaction?

• It is destroyed during the reaction.

• It is released when the reaction is complete.

• It is converted into chemical energy during the reaction.

• It is changed into atoms of carbon and oxygen during the reaction

The level in an Ecological pyramid that includes all the organisms that share the same place in a food chain.

• Trophic Levels

• Toxic Levels

• KeKe Levels

• Environmental Systems