The Underwater Forest

What is the primary source of energy for almost all life on Earth?

• Sea urchins

• Sun

• Kelp

• Sea otters

What role do sea otters play in the underwater forest ecosystem?

• They eat kelp and provide nutrients for other organisms.

• They protect the shark population

• They prey on sunflower stars.

• They help maintain diversity and balance.

What happens when there are too many sea urchins in the underwater forest?

• The kelp forest is destroyed.

• Sea otters become endangered.

• Sunflower stars thrive.

• Snails find more protection.

Kai and Ava are studying marine biology. They are trying to identify which of the following is NOT a predator of sea urchins. Can you help them?

• Sea otters

• Sunflower stars

• Microscopic phytoplankton

• Small fishes

During a class trip to the coastal waters, William and Isla learned about the role of kelp in the underwater forest ecosystem. What did they discover? There is more than one answer to this question, please check all that apply.

• It provides food and shelter for snails and crabs.

• It protects small fishes from predators.

• It controls the population of sea otters.

• It serves as a primary producer.

What is the main food source for the sea urchins in the underwater forest?

• Fallen kelp blades

• Sunlight

• Sea otters

• Microscopic phytoplankton

How many species are linked in the diverse food web of the underwater forest?

• Less than 100

• Around 500

• More than 1,000

• Exactly 10

What role do producers play in the food web?

• They decompose organic matter.

• They provide energy for other organisms.

• They compete with predators for food.

• They consume other animals for energy.

What are kelp and phytoplankton known as in the underwater forest ecosystem?

• Primary consumers

• Secondary producers

• Primary producers

• Tertiary consumers

What role do producers like plants, kelp, and phytoplankton play in the ecosystem?

• They act as a habitat for marine life.

• They regulate the climate by absorbing carbon dioxide.

• They are the primary source of energy for most organisms.

• They help in the decomposition of organic matter.