Changes to Ecosystems

The Coqui frog is native to Puerto Rico. These frogs were accidentally introduced in Hawaii. Coqui frogs are extremely noisy; since they are nocturnal they make loud noises at night. Although these frogs are small, they eat a lot! They eat insects and spiders that are also eaten by birds in Hawaii. Besides being noisy, how do these frogs most likely harm other animals? 

• By causing other animals to reproduce more.

• By competing with other animals for food.

• By eating foods that no other animals eat.

• By moving slower than most other animals.

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How does a bird "change its environment" to meet its NEEDS?

• builds a nest

• flies around

• catches bugs

• looks for something to eat

What is a drought?

• Not enough rain

• Too much rain.

• Too much people using water

• Strong winds

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The removal of trees and plants can cause problems such as soil erosion. 

• True

• False

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All of the following are examples of ways humans can decrease their effect on local ecosystems except –

• recycle instead of throwing items in the garbage

• drive larger cars

• collect rainwater to water gardens

• use reusable grocery bags instead of plastic bags

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Deforestation is the destruction of forests in order to make the land available for other uses. Which of the following is one negative impact of deforestation?

• There is more room for farming and agriculture.

• There is more lumber available for building homes and other buildings.

• Animals lose their homes and many species die off or become endangered.

• Ranchers have more land for livestock such as cattle and sheep.

  
  

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What is an invasive species?

• Living organism that is accidentally introduced to a new ecosystem and causes harm

• A group of organisms that hunts other organisms

• An unhealthy organism that spreads disease in an ecosystem

• All of the above

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Which of the following human activities does NOT have a negative impact on the environment?

• Burning large amounts of fossil fuels

• Increased use and production of plastic

• Overfishing in oceans and other waters

• Creation of green spaces and open spaces in cities

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What is biodiversity?

• A record of all the endangered and threatened species on Earth

• The variety of species of living organisms in an ecosystem

• A record of all extinct species in Earth’s history

• The variety of plant species in an ecosystem

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The Leatherback Sea Turtle has been listed as an endangered species since 1970. It lives in the Gulf of Mexico, although it rarely visits the Texas coast. Populations have decreased due to human activities. Which of the following is most likely a consequence of the decreasing turtle population?

• The population of sea grasses, part of their diet, will decrease.

• The population of predators that eat sea turtles and their eggs will increase.

• The population of jellyfish, their main diet, will increase.

  
  

• There are no consequences; sea turtles are not an important part of the marine ecosystem.

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