Unit 7 Review - Ocean Ecology & Chemistry

The pH of an acidic solution will be...

• Lower than 7

• Above 7

• Exactly 7

Carbon is used in the process called __________ by plants and algae to make food and the building blocks for growth.

• carbon cycle

• life

• photosynthesis

• decomposition

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the primary reason for the increase in atmospheric CO2 levels over the past 100 years?

• Increased volcanic activity

• Human activities such as burning fossil fuels and deforestation

• Natural carbon cycle processes

• Increased solar radiation

Tags

NGSS.MS-ESS3-4

NGSS.MS-ESS3-5

As the ocean becomes more acidic, the pH of the water

• increases
• decreases

Tags

NGSS.MS-PS1-2

Ocean acidification raises the pH of the ocean .

• True

• False

Tags

NGSS.MS-PS1-2

Match the molecules that contain carbon to their molecular formulas

• CaCO₃

• carbon dioxide

• CO₂

• glucose

• H₂CO₃

• carbonic acid

• C₆H₁₂O₆

• calcium carbonate

Tags

NGSS.MS-PS1-1

Man made carbon dioxide comes from the burning of fossil fuels.  An example of a fossil fuel is

• wood
• oil
• shale

Tags

NGSS.MS-ESS3-1

In this diagram of the carbon cycle, the B line represents (a)   .

• photosynthesis

• upwelling

• decomposition

• respiration

Answer explanation

The B line in the carbon cycle diagram represents photosynthesis, the process by which plants convert carbon dioxide and sunlight into glucose and oxygen, playing a crucial role in the carbon cycle.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Match the following locations with where carbon atoms can be found in the ocean.

• as ions in ocean water

• in coral skeletons

• secreted by coral polyps

• in the DNA of organisms

• in the remains of ancient plants and animals

• dissolved in the water column

• in the genetic material of marine life

• in fossil fuels

____________ delivers nutrients to the deep sea, and ____________ delivers some back to the surface waters.

• Decomposition, chemosynthesis

• Marine snow, upwelling

• Downwelling, harvesting

Answer explanation

Marine snow refers to organic matter that falls from the upper layers of the ocean to the deep sea, providing nutrients. Upwelling is the process that brings nutrient-rich water back to the surface, completing the cycle.