Ecosystem Dynamics and Energy Flow

The video tutorial discusses ecosystem balance, highlighting the interdependence of living things. It explains photosynthesis as the energy source for plants and how energy flows through food chains and webs. The impact of changes, such as disease, habitat alteration, and human activities like global warming, is explored. The role of predators and pollution in altering ecosystems is also covered, emphasizing the need for maintaining balance to prevent collapse.

What is the primary source of energy for grass in a food chain?

• Water

• Sunlight

• Soil

• Air

Which process do plants use to convert sunlight into energy?

• Digestion

• Photosynthesis

• Fermentation

• Respiration

What is the main product of photosynthesis that animals use for energy?

• Carbon Dioxide

• Glucose

• Oxygen

• Water

What is a food web?

• A complex network of interconnected food chains

• A simple linear sequence of who eats whom

• A diagram showing only plant-eating animals

• A chart of animal lifespans

In a food web, what might happen if all the rabbits in an ecosystem died?

• The grass would decrease

• The fox population might decrease

• The owl population would increase

• The cow population would increase

How can global warming affect ecosystems?

• By reducing the amount of sunlight

• By increasing the number of predators

• By increasing the oxygen levels

• By making some habitats too hot for certain species

What is one potential consequence of introducing a new predator into an ecosystem?

• Decrease in pollution levels

• Disruption of the existing food web

• Stabilization of the ecosystem

• Increased plant growth

Which of the following is NOT a factor that can disrupt ecosystem balance?

• Stable climate

• New predators

• Pollution

• Habitat change

Why are plants considered the most important part of an ecosystem?

• They provide shelter for animals

• They control the weather

• They are the primary source of food

• They produce carbon dioxide

What can happen if pollution makes water dirty in an ecosystem?

• Stabilization of the ecosystem

• Improvement in air quality

• Increase in plant growth

• Decrease in animal populations