Lesson 1: Diving into The Ocean - Quiz

What percentage of the planet is covered by ocean?

• 50%

• 70%

• 90%

• 30%

In comparison with the euphotic zone the aphotic zone of the ocean is much cooler.

• True

• False

Which of the following is an example of a biotic factor in an ecosystem?

• Water

• Sunlight

• Fish

• Rocks

Pneumatophores are roots of mangrove trees that are significant for all of the following accept

• preventing erosion

• carrying oxygen through rooting system

• filter freshwater

• providing shelter for small marine life

What defines an ecosystem?

• A group of similar species living together

• A community of living organisms interacting with their environment

• A collection of abiotic factors in a region

• A single species dominating an area

Give an example of an interaction between a biotic and an abiotic factor in a marine ecosystem.

• Fish swimming in water

• Plants needing sunlight to produce food

• Birds flying in the sky

• Rocks being eroded by wind

What role do organisms play in an ecosystem?

• They have no impact on the ecosystem

• They only consume resources

• They play a role in the health and success of the ecosystem

• They only provide energy to other organisms

Which of the following terms describes seasonal movement of individuals into and out of a population?

• immigration

• migration

• emigration

• permanent movement

What is a whale fall?

• A type of whale migration

• A whale carcass sinking to the sea floor

• A whale jumping out of the water

• A whale giving birth

What role do colonizers play in the decomposition of whale falls?

• They eat the whale bone

• They consume the flesh and tissue left by other organisms

• They decompose the skeleton

• They cover the skeleton with sediments