Currents, Climate, & Weather

Which of the following is true of El Nino?

• El Nino usually occurs twice a year.
• El Nino can cause unusual and often severe weather conditions.
• El Nino affects only the ocean, not the land.
• El Nino occurs at the same time as La Nina.

How does a hurricane form?

• It begins as a high-pressure area over cold ocean water.
• It begins as a low-pressure system area over warm ocean water.
• It beings as a high-pressure area over warm ocean water.
• It begins as a low-pressure area over cold ocean water.

What type of information can usually be found on a weather map?

• Fronts
• Precipitation
• Areas of high and low pressure
• All of the answers are correct

What type of front forms when a fast cold air mass runs into a slow warm air mass?

• Stationary
• Occluded
• Cold
• Warm

What type of front occurs when a warm air mass meets a cold air mass, but neither air mass can move over the other?

• Occluded
• Warm
• Cold
• Stationary

What does an "H" inside a circle represent on a weather map?

• Hurricane
• High Humidity
• Hot
• High Pressure

Hurricanes usually form in certain areas off the coast of Africa and in the Pacific Ocean. Why do hurricanes form in these regions?

• These regions have cold, deep ocean currents.
• Tropical maritime air masses and continental polar air masses often meet in these regions.
• High pressure systems are common in these regions.
• These regions have warm, moist air.

A student studies a weather map and notices that a warm, moist, low-pressure system is developing near his landlocked town. Which statement best explains why this system will not develop into a hurricane?

• Hurricanes require high-pressure systems to develop.
• Hurricanes take weeks to form.
• Hurricanes form in cold, not warm, conditions.
• Hurricanes form over oceans, not land.

What is the role of the oceans in the formation of weather systems?

• Oceans provide energy for weather systems.
• Ocean currents provide wind for storms.
• Oceans provide a difference in pressure between air and water.
• Oceans provide the temperature differences of weather systems.

What is a front?

• The space between two air masses.
• The area where two air masses meet.
• The area where an air mass meets land.
• The space between an air mass and the land.