Unit 8 Test Pearland ISD Science

Look at the picture of the graph. Based on information in the graph, which sentence is true?

• Ecoregion Q has a lot of animals that eat trees
• Ecoregion R has a variety of biotic factors that support the abiotic factors
• Ecoregion S has poor soil quality and extremely high precipitation
• Ecoregion T has the abiotic factors to support the greatest variety of plant life

Which  ECOREGION in the graph is most likely to support the least amount of  different varieties of organisms?

• Q
• R
• S
• T

Organic compounds can be distinguished from inorganic compounds because organic compounds always ....

• contain carbon and certain other elements
• have higher boiling and melting points
• make up the largest molecules that exist
• will conduct electricity and be magnetic

As species disappear from a prairie ecosystem, their disappearance results in ....

• likelihood of prairie wildfires breaking out
• numbers of species in nearby ecosystems
• reduction in sustainability of the prairie ecosystem
• numbers of offspring in remaining species

The Brazilian rain forest is an area with significant biodiversity. As the rain forest is replaced with agricultural land, it is reasonable to predict a reduction in—

• consumption of solar energy
• sustainability over time
• precipitation levels
• average daily temperature 

Which of the following compounds is ORGANIC?

• CaH₁₀P₄K₃O₄
• NaCl
• C₆H₁₂O₆
• Fe₂O₃

Which of the following biomes supports the greatest variety of organisms— 

• A
• B
• C
• D

The ocean ecosystem has a high sustainability because of -

• strong, persistent currents
• predator/prey relationships
• green plants growing on the bottom
• the large variety of different organisms

Which of the paired statements could be used to distinguish the insects using a dichotomous key? 

• Has 6 legs  
  Has 8 legs
• Large hind legs   Small hind legs
• 2 pairs of spots on wing cover
    3 pairs of spots on wing cover
• Antennae absent   Antennae present  

Which one of the locations indicated is most likely to have the greatest biodiversity?
Location ....

• Q
• R
• S
• T