Science Unit 3 7

Question 1

Why is energy lost as it travels up the food chain?

Answer 1

because the energy is used to capture and eat prey as well as grow and maintain the body of the consumer

Question 2

Which type of succession usually starts without soil?

Answer 2

primary succession

Question 3

What are some threats to freshwater ecosystems?

Answer 3

Freshwater ecosystems such as rivers are impacted by pollution habitat degradation and development. In addition freshwater wetlands and marshes are being destroyed as they are filled in or become places to dump waste.

Question 4

What is the significance of coral reefs?

Answer 4

Coral reefs are home to some of the most diverse animals and plants on the planet.Coral reefs protect shorelines and are very fragile with respect to environmental changes.

Question 5

What kinds of habitats can you find within salt water ecosystems?

Answer 5

Ocean habitats include a shoreline sand bottoms and deep crevices as well as open ocean.

Question 6

After a rather large volcanic eruption in the South Pacific a new group of islands has formed where land previously had not existed. Over the next several years some small plants start to grow and populate the island. These plants give way to small shrubs and trees that provide habitat for sea birds. This is an example of _____.

Answer 6

primary succession

Question 7

Which of the following represents a threat to a fresh or saltwater ecosystem?

Answer 7

population and climate change and human development

Question 8

Of the following which is not a freshwater ecosystem?

Answer 8

estuary

Question 9

Which biome usually has four distinct seasons?

Answer 9

temperate deciduous forest

Question 10

Which of the following biomes is populated by moose bears lynx shrews and foxes?

Answer 10

taiga