Ecosystems

The place where an organism lives is its __________.

• habitat
• ecosystem
• organism
• population

Which is an example of an ABIOTIC factor?

• hummingbird
• water
• dead tree branch
• skunk

Which is an example of a BIOTIC factor?

• lightning
• algae
• sand
• clouds

Which are located at the very BOTTOM of an energy pyramid? 

• producers
• consumers - Level 1
• consumers - Level 2
• decomposers

A bird in a tree watched as a lion stalked, attacked, and then ate a zebra. Which of these animals was the prey?

• bird
• lion
• zebra
• all of the above

A bird hitches a free, safe ride on the back of a grey elephant. The elephant doesn't seem to mind and barely notices the bird. Which type of relationship is this?

• mutualism
• commensalism
• parasitism

Natural disasters such as flooding and tornadoes are linked to ________________.

• primary
• secondary
• old field
• ecosystem

How do lichens contribute to primary succession?

• Lichens decompose organic matter from animals and plants
• Lichens begin to break down rock to form soil
• Lichens are nitrogen fixing bacteria
• Lichens convert carbohydrates into fossil fuels.

What is formed during primary succession that doesn't need to be formed during secondary succession?

• pioneer species
• soil
• climax community
• lichens

What type of succession is shown going from figure A to figure B?

• primary succession
• eutrophication
• secondary succession
• intermediate