Ecosystem Changes and Human Impact

The video reviews changes in ecosystems, focusing on natural and human-induced changes. It discusses the effects of these changes, such as extinction and adaptation, and highlights the role humans can play in protecting ecosystems through laws and regulations.

What are the two main ways ecosystems can change?

• By changes in the Earth's orbit

• Through natural disasters and human activities

• By seasonal changes and animal migration

• Through volcanic eruptions and earthquakes

Which natural disaster can lead to the extinction of species like the California condor?

• Volcanic eruption

• Flood

• Forest fire

• Earthquake

How does smog from cars affect the Earth's temperature?

• It causes the Earth to warm up

• It has no effect on temperature

• It leads to more rainfall

• It cools down the Earth

What is a consequence of the ozone layer being worn out?

• More frequent earthquakes

• Increased rainfall

• Decreased solar energy reaching Earth

• Higher temperatures on Earth

What is one positive effect of fires on ecosystems?

• They cause soil erosion

• They help in seed dispersal

• They destroy all plant life

• They increase pollution

What might animals do to adapt to changes in their ecosystem?

• Move to a new area

• Stop eating altogether

• Hibernate for longer periods

• Change their color

What is one way humans can help protect ecosystems?

• By increasing pollution

• By hunting all animals

• By cutting down more trees

• By making laws to control smog

Why is it important to control the number of bears in an ecosystem?

• To prevent them from migrating

• To increase the number of plankton

• To maintain balance in the food chain

• To ensure they eat all the fish

What happens if there are too many plankton in an ecosystem?

• They turn into fish

• They become predators

• They die off due to lack of food

• They thrive and multiply

What is the role of hunting laws in ecosystem protection?

• To eliminate all prey species

• To encourage illegal hunting

• To control the population of species

• To increase the number of predators