Ecosystems and Organisms

A __________ includes all living and non-living things in an environment. 

• population
• niche
• abitotic
• ecosystem

Which organism make their own food through the process of photosynthesis? 

• decomposer
• consumer
• herbivore
• producer 

If the population of prey increases, the population of predators will ________because of the availability of food.

• decrease
• stay the same
• increase

What are overlapping food chains called?

• consumers

• predators

• food web

• ecosystem

What would most likely happen if an ecosystem no longer received sunlight?

• The number of herbivores would increase
• The number of plants would increase
• all organisms would adapt
• All living organisms would eventually die

Examples of how humans negatively affect local ecosystems are

• Building dams, deforestation (cutting down trees), adding point sources to nearby streams to allow for run-off, building roads and structures, and salting roads.
• Creating laws to prohibit fishing from local streams.
• Planting trees and other plants to attract native species.
• Removing non-native species from the environment.

All food chains_____________________

• have more consumers than producers
• produce and use same amount of energy
• begin with a producer
• are unhealthy 

How does energy enter an ecosystem? 

• sunlight
• soil 
• animals 
• invasive species 

A lion, captures and eats other animals. What is he considered? 

• prey
• predator
• producer 
• healthy 

How do consumers get their energy? 

• laying in the sun
• eating other organisms 
• providing food for other organisms
• surviving in an ecosystem