Understanding El Niño and La Niña

What is the primary effect of El Niño on global weather patterns?

• It stabilizes weather patterns worldwide.

• It has no significant impact on weather.

• It causes a decrease in global temperatures.

• It alters the odds of extreme weather events.

What role do trade winds play in the Pacific Ocean under normal conditions?

• They blow from west to east.

• They push warm water towards Asia and Australasia.

• They cause the ocean to freeze.

• They have no effect on ocean temperatures.

What process replaces warm water with cold water near South and Central America?

• Precipitation

• Condensation

• Evaporation

• Upwelling

How does El Niño affect the trade winds?

• It weakens or reverses them.

• It has no effect on them.

• It causes them to blow in a circular pattern.

• It strengthens them.

Which regions are most affected by El Niño in terms of increased flood risk?

• Brazil

• India

• Peru

• Indonesia

What is a significant consequence of the extra heat released during El Niño?

• It results in more snowfall.

• It leads to a decrease in sea levels.

• It temporarily raises global temperatures.

• It causes global cooling.

When does El Niño typically peak?

• In late autumn

• In early spring

• Around Christmas-time

• During the summer months

What is the main difference between El Niño and La Niña?

• La Niña has no impact on global weather.

• La Niña strengthens trade winds, while El Niño weakens them.

• El Niño and La Niña have the same effects on weather.

• El Niño strengthens trade winds, while La Niña weakens them.

How does La Niña affect the temperature of the Pacific Ocean?

• It cools the western Pacific.

• It warms the eastern Pacific.

• It has no effect on ocean temperatures.

• It increases upwelling of cold water in the east.

What is the effect of La Niña on global weather patterns?

• It causes a decrease in global temperatures.

• It stabilizes weather patterns worldwide.

• It tends to have opposite effects to El Niño.

• It has the same effects as El Niño.