Positive and Negative Human Impact Ocean Systems

The video explores environmental changes, distinguishing between short-term and long-term impacts on organisms and ecosystems. Short-term changes occur rapidly, forcing immediate adaptation or extinction, while long-term changes allow for gradual adaptation over generations. Examples include droughts, smog, and deforestation. The video also discusses human dependence on oceans for resources and climate regulation, highlighting negative impacts like overfishing and pollution, and positive actions like creating artificial reefs.

What are the two main types of environmental changes discussed in the video?

• Natural and artificial changes

• Seasonal and permanent changes

• Biological and chemical changes

• Short-term and long-term changes

Which of the following is NOT an example of a short-term environmental change?

• Volcanic eruption

• Flooding

• Drought

• Ice age

What is the immediate effect of short-term environmental changes on populations?

• Populations remain unaffected.

• Populations have time to adapt.

• Populations must move, change behavior, or face extinction.

• Populations grow rapidly.

What is a characteristic of long-term environmental changes?

• They are always caused by human activities.

• They happen over generations and can lead to adaptations.

• They never lead to extinction.

• They occur quickly and affect organisms immediately.

Which of the following is an example of a long-term environmental change?

• Hurricane

• Deforestation

• Blizzard

• Tornado

What is the term used to describe the survival of organisms best adapted to long-term changes?

• Natural selection

• Artificial selection

• Mutation

• Genetic drift

How do humans primarily depend on the ocean?

• For mining precious metals

• To dispose of waste

• As a source of food and climate regulation

• For entertainment purposes only

Which of the following is a negative impact of human activity on ocean systems?

• Replanting native crops

• Restocking fish hatcheries

• Overfishing

• Creation of artificial reefs

What is one way humans positively modify ocean systems?

• Introducing exotic species

• Increasing runoff

• Creating artificial reefs

• Causing oil spills

What is a consequence of introducing exotic species into ocean systems?

• Displacement of native species

• Improved water quality

• Decreased competition for resources

• Increased biodiversity