Phytoplankton and Fluid Dynamics Concepts

Paul Tett, an ecologist, uses physics models to study oceanic plankton, focusing on phytoplankton. These microscopic plants require light and nutrients, which are often found at different sea depths. Their small size offers advantages like a high surface area-to-volume ratio, aiding nutrient uptake and light exposure. Plankton movement is influenced by water currents, forming eddys. Viscosity affects small organisms, making it hard to interact with particles. A demonstration with glycerine shows reversible motion, highlighting unique locomotion challenges for microorganisms.

What is the primary focus of Paul Tett's research?

• The migration patterns of whales

• The breeding habits of sea turtles

• The behavior of oceanic plankton using physics models

• The impact of pollution on coral reefs

What are phytoplankton primarily composed of?

• Multiple cells with chlorophyll

• Multiple cells with red pigment

• Single cells with chlorophyll and red pigment

• Single cells with no pigment

Why do phytoplankton struggle to get both light and nutrients simultaneously?

• Nutrients are at the surface, while light is deep down

• Both light and nutrients are scarce in the ocean

• Light is at the surface, while nutrients are deep down

• Light and nutrients are both found deep in the sea

How does being small benefit phytoplankton in terms of nutrient uptake?

• They can move faster to find nutrients

• They can store more nutrients

• They have a high surface area to volume ratio

• They have a low surface area to volume ratio

What is the main advantage of phytoplankton sinking slowly in seawater?

• They can absorb more nutrients

• They can travel long distances

• They can stay close to the light source

• They can avoid predators

What natural phenomenon is demonstrated by pouring cream into coffee?

• The formation of ocean waves

• The evaporation of water

• The creation of ocean currents

• The formation of swirls and eddys

What property of water affects small organisms like plankton?

• Density

• Temperature

• Salinity

• Viscosity

What is the effect of high viscosity on small organisms?

• It allows them to swim faster

• It makes it difficult for them to contact other organisms

• It makes it easier for them to move

• It helps them to float

What is demonstrated using glycerine in the video?

• The boiling point of glycerine

• The reversible nature of motion in viscous liquids

• The irreversible nature of water motion

• The density of glycerine compared to water

How do small organisms like plankton move in water?

• By moving their flagella up and down

• By using a corkscrew-like motion

• By swimming in straight lines

• By floating passively