Unit 10 Exam Review

What is the primary source of energy for most ecosystems?

• The Moon

• The Sun

• The Ocean

• The Wind

Tags

TEKS.SCI.7.12A

Which of the following best describes the flow of energy in an energy pyramid?

• Energy increases at higher trophic levels

• Energy remains constant across all trophic levels

• Energy decreases at higher trophic levels

• Energy is not transferred in an energy pyramid

Tags

TEKS.SCI.7.12A

What is a biotic factor that organisms in an ecosystem might compete for?

• Water

• Light

• Food

• Temperature

Tags

TEKS.SCI.6.12A

How might a decrease in water availability affect a population in an ecosystem?

• Increase in population size

• No effect on the population

• Decrease in population size

• Population will remain stable

Tags

TEKS.SCI.6.12A

What is primary ecological succession?

• The gradual replacement of one community by another

• The establishment of a community in an area of bare rock

• The sudden change in an ecosystem due to a natural disaster

• The extinction of a species

Tags

TEKS.SCI.8.12B

How does secondary succession differ from primary succession?

• Secondary succession occurs in areas with no soil

• Secondary succession occurs faster than primary succession

• Secondary succession does not involve plant growth

• Secondary succession occurs in areas with no previous life

Tags

TEKS.SCI.8.12B

What is biodiversity?

• The variety of life in a particular habitat or ecosystem

• The number of individuals in a population

• The amount of sunlight in an ecosystem

• The flow of energy in a food web

Tags

TEKS.SCI.8.12C

How does biodiversity contribute to the stability of an ecosystem?

• By reducing the number of species

• By increasing the resilience of the ecosystem to disturbances

• By decreasing the availability of resources

• By limiting the growth of populations

Tags

TEKS.SCI.8.12C

What is one way that human intervention can disrupt an ecosystem?

• Planting trees

• Building dams

• Conserving wildlife

• Recycling waste

Tags

TEKS.SCI.8.12A

How might a natural disaster impact the transfer of energy in a food web?

• It increases the energy available to all trophic levels

• It has no impact on the energy transfer

• It disrupts the energy flow by reducing the number of organisms

• It enhances the energy flow by increasing biodiversity

Tags

TEKS.SCI.8.12A