Science MAP Prep

Which of the following are hazards posed by volcanic eruptions?

• lava flows
• the release of toxic gases
• avalanches
• all of these

Many coyotes live in undeveloped land away from humans. Which is the most likely reason that more coyotes are appearing in the outskirts of expanding cities?

• The coyotes' young need contact with humans to develop.
• The coyotes have moved into the cities, towns, and suburbs.
• The coyotes prefer to live closer to humans.
• The coyotes' habitat was turned into housing developments.

Mosquitoes must lay their eggs in standing water. What would most likely happen to the mosquito population in an ecosystem that experienced less rainfall than usual?

• The mosquito population would disappear altogether.
• The mosquito population would increase in size.
• The mosquito population would decrease in size.
• The mosquito population would not experience any changes.

In addition to the destruction of vegetation, what is another hazard that a wildfire poses to an ecosystem?

• volcanic activity
  
• 
  flooding
• weathering of rocks
  
• 
  destruction of animal habitats

What do most birds do in the wintertime?

• 
  They stay in their nests all winter to keep warm.
• They group together to keep each other warm.
• 
  They find a warm garage or vacant building to live in.
• 
  They fly south for the winter because more food is available and it is warmer.

How do humans influence ecosystems negatively?

• 
  by introducing new animals to established areas
• 
  by recycling household trash
• by creating state parks
• by decreasing emission of greenhouse gases

Rabbits are introduced into a grassland area. Which action of the rabbits would harm the buffalo that live in the grassland?

• eating the grass
• building burrow
• attracting predators
• attacking prey

The soil on a plain is eroded and the grass starts to die. Grazing animals that live on the plain would probably

• become predators
• become carnivores
• decrease in number
• increase in number

Imagine that an animal species becomes extinct. What will happen to the animals directly above and below it in the food chain?

• 
  Animals directly above it will increase in number, and animals directly below it will decrease in number.
• 
  Animals directly above it and animals directly below it will both decrease in number.
• Animals directly above it will decrease in number, and animals directly below it will increase in number.
• Animals directly above it and animals directly below it will both increase in number.

The shark is a predator of small fish. If sharks were removed from an environment, the population of fish would most likely

• stay the same
• increase
• become extinct
• decrease