*** Unit 2 Test

Rain carries soil into a nearby pond. This is an interaction between which two "spheres" of the earth?

• Hydrosphere & Atmosphere
• Atmosphere & Biosphere
• Geosphere & Hydrosphere
• Atmosphere & Geosphere

The unique role a species plays in its environment is its...

• abiotic factor
• niche
• trophic level
• community

Many species together in one place is called ____________ .

• a niche
• a community
• a population
• mutualism

Which level of any energy pyramid is most likely to have the highest number of organisms?

• Producers
• Primary consumers
• Secondary consumers
• Tertiary consumers

Two types of organisms consumer dead and decaying matter. The difference between these two types of organisms is that _______________ are consumers that feed on dead animals, while _________________ break down plants and animals into simpler molecules.

• decomposers; producers
• scavengers; decomposers
• producers; decomposers
• decomposers; scavengers

We know that energy from the sun is transferred into an organism because of __________________ .

• the 1st law of thermodynamics
• the 2nd law of thermodynamics
• the 3rd law of thermodynamics

The arrows on a food web or food chain represent _______________.

• the direction in which energy is being transferred
• how far away one species is from another
• the organism that is being eaten
• nothing

A tiny filter-feeding barnacle sticks to a whale. The whale is unaffected by this new stowaway. What type of relationship is this?

• mutualism
• commensalism
• amensalism
• neutralism
• parasitism

Cowbirds are known to lay their eggs in nests of other birds. Mother birds will feed the new chicks and their own, which sometimes mans not every chick gets enough food. This is an example of ___________.

• mutualism
• commensalism
• amensalism
• neutralism
• parasitism

Which sphere of the earth is named using the Greek root meaning "ground"?

• Hydrosphere
• Atmosphere
• Biosphere
• Geosphere