Q3 Test 1

In a river with fast moving water has less aquatic plats, which of the following statement best describe low photosynthesis rate in this areas?

• moving water lowers dissolved oxygen levels in water

• moving water means consumers needs to eat more to survive

• the flow of the ocean currents is to strong that causes consumer to stop from feeding

• flowing currents prevents the build up of nutrients needed for plant to perform photosynthesis

Which of the following are the main producers of marine ecosystems?

• phytoplankton

• plants

• bacteria

• zooplankton

Algae & phytoplankton depend on sunlight and nutrients from water to survive. Suppose currents have been disrupted and upwelling has stopped. How will sharks be impacted this change?

Deep ocean technology has discovered organisms in hydrothermal vents that do not rely on sunlight to survive. What do these organisms use as their energy source?

• chemosynthesis
• electrical charge
• hydropower
• thermal heat

Some marine plants are found in different levels of the ocean, some of them are found in the deep ocean. Which of the following statement is the reason for these statement?

• it is part of their reproductive process

• it their way to avoid predators

• they move to specific levels because they can find vital nutrients within those areas.

• because they are needed for sedimentation.

What 2 factors decrease population size?

• Immigration, Births
• Emigration, Births
• Emigration, Deaths
• Immigration, Deaths

Which of the following is NOT true?

• Without oceans, Earth would have much less biodiversity.

• Oceans give Earth a more moderate climate.

• Oceans are an enormous reservoir for water.

• Without oceans, there would be more evaporation and more precipitation on Earth.

Oceans moderate Earth's temperature by

• absorbing heat near the equator and moving it towards the poles

• absorbing heat near the Tropic of Cancer and in the summer and moving it towards the Tropic of Capricorn in the winter

• absorbing heat near the Tropic of Cancer and in the winter and moving it towards the Tropic of Capricorn in the summer.

• None of these.

Phytoplankton in the ocean produce more than half of the _______ in the atmosphere.

• nitrogen

• helium

• oxygen

• carbon

Why are ocean currents important?

• ocean currents allow people to sail around the world

• ocean currents move the continents from one place to another

• ocean currents move heat energy from the equator to the poles

• Ocean currents affect the rotation of the Earth