Earth Science › Explain what causes storms, cold fronts, and warm fronts
When strong updrafts occur, what type of weather should we expect?
tornadoes, hail, high winds
clear, sunny skies
gentle showers
high humidity but no rain
The answer is "tornadoes, hail, high winds."
A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
Thunderstorms are caused by moisture and differences in air pressure. Remember that warm air rises and cold air sinks. When warm, moist air is near the ground and cold, dry air is up above, convection will create unstable air currents where high pressure and low pressure systems meet. In a big thunderstorm cloud, there are now strong upward winds and downward winds happening at the same time. These are called updrafts and downdrafts. This is the most dangerous stage of the storm, when tornadoes, hail, winds and flooding can happen. Updrafts continue to fuel the storm with warm, moist air. But, once a storm runs out of updrafts, it starts to weaken.
How do convection currents cause thunderstorms?
They cause warm air to rise and cold air to sink.
They cause cold air to rise and warm air to sink.
They cause warm and cold air to sink.
They cause warm and cold air to rise.
The answer is "They cause warm air to rise and cold air to sink."
A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
Thunderstorms are caused by moisture and differences in air pressure. Remember that warm air rises and cold air sinks. When warm, moist air is near the ground and cold, dry air is up above, convection will create unstable air currents where high pressure and low pressure systems meet. In a big thunderstorm cloud, there are now strong upward winds and downward winds happening at the same time. These are called updrafts and downdrafts. This is the most dangerous stage of the storm, when tornadoes, hail, winds and flooding can happen. Updrafts continue to fuel the storm with warm, moist air. But, once a storm runs out of updrafts, it starts to weaken.
Which of the following best defines a "warm front"?
a boundary between two different air masses, where cold air is retreating and warm air is advancing
a boundary between two different air masses, where cold air is advancing into warm air
a boundary between two different air masses, where two warm air masses collide
a boundary between two different air masses, where two cold fronts cancel each other out
The answer is "a boundary between two different air masses, where cold air is retreating and warm air is advancing."
A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
Thunderstorms are caused by moisture and differences in air pressure. Remember that warm air rises and cold air sinks. When warm, moist air is near the ground and cold, dry air is up above, convection will create unstable air currents where high pressure and low pressure systems meet. In a big thunderstorm cloud, there are now strong upward winds and downward winds happening at the same time. These are called updrafts and downdrafts. This is the most dangerous stage of the storm, when tornadoes, hail, winds and flooding can happen. Updrafts continue to fuel the storm with warm, moist air. But, once a storm runs out of updrafts, it starts to weaken.
What would a meteorologist be paying the MOST attention to if she were trying to predict whether a thunderstorm would occur?
air pressure
temperature
dew point
wind chill
The answer is "air pressure."
A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
Thunderstorms are caused by moisture and differences in air pressure. Remember that warm air rises and cold air sinks. When warm, moist air is near the ground and cold, dry air is up above, convection will create unstable air currents where high pressure and low pressure systems meet. In a big thunderstorm cloud, there are now strong upward winds and downward winds happening at the same time. These are called updrafts and downdrafts. This is the most dangerous stage of the storm, when tornadoes, hail, winds and flooding can happen. Updrafts continue to fuel the storm with warm, moist air. But, once a storm runs out of updrafts, it starts to weaken.
What happens when a storm starts to run out of updrafts?
the storm will weaken
the storm will strengthen
nothing will happen to the storm
the storm will produce lightning
The answer is "the storm will weaken."t
A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
Thunderstorms are caused by moisture and differences in air pressure. Remember that warm air rises and cold air sinks. When warm, moist air is near the ground and cold, dry air is up above, convection will create unstable air currents where high pressure and low pressure systems meet. In a big thunderstorm cloud, there are now strong upward winds and downward winds happening at the same time. These are called updrafts and downdrafts. This is the most dangerous stage of the storm, when tornadoes, hail, winds and flooding can happen. Updrafts continue to fuel the storm with warm, moist air. But, once a storm runs out of updrafts, it starts to weaken.
Which of these factors are required to form both hurricanes and thunderstorms?
winds moving towards the center of the storm and warm air rising into the clouds
winds moving at low speeds and a high temperature
high temperature and high moisture content
winds moving away from the center of a storm and high moisture
The answer is "winds moving towards the center of the storm and warm air rising into the clouds."
A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
Thunderstorms are caused by moisture and differences in air pressure. Remember that warm air rises and cold air sinks. When warm, moist air is near the ground and cold, dry air is up above, convection will create unstable air currents where high pressure and low pressure systems meet. In a big thunderstorm cloud, there are now strong upward winds and downward winds happening at the same time. These are called updrafts and downdrafts. This is the most dangerous stage of the storm, when tornadoes, hail, winds and flooding can happen. Updrafts continue to fuel the storm with warm, moist air. But, once a storm runs out of updrafts, it starts to weaken.
What conditions are required in order for a thunderstorm to occur?
moisture and differences in air pressure
moisture and lightning
moisture and heat
moisture and heavy clouds
The answer is "moisture and differences in air pressure."
A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
Thunderstorms are caused by moisture and differences in air pressure. Remember that warm air rises and cold air sinks. When warm, moist air is near the ground and cold, dry air is up above, convection will create unstable air currents where high pressure and low pressure systems meet. In a big thunderstorm cloud, there are now strong upward winds and downward winds happening at the same time. These are called updrafts and downdrafts. This is the most dangerous stage of the storm, when tornadoes, hail, winds and flooding can happen. Updrafts continue to fuel the storm with warm, moist air. But, once a storm runs out of updrafts, it starts to weaken.
Which of the following best describes when thunderstorms are MOST likely to occur?
Thunderstorms can occur year-round and at all hours. But they are most likely to happen in the spring and summer months and during the afternoon and evening hours.
Thunderstorms are most likely to happen in the fall and winter months at all hours of the day.
Thunderstorms can happen year round but are more likely to happen in the evening and early morning hours.
Thunderstorms do not happen more often at any time of day or during any specific season.
The answer is "Thunderstorms can occur year-round and at all hours. But they are most likely to happen in the spring and summer months and during the afternoon and evening hours."
A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
Thunderstorms are caused by moisture and differences in air pressure. Remember that warm air rises and cold air sinks. When warm, moist air is near the ground and cold, dry air is up above, convection will create unstable air currents where high pressure and low pressure systems meet. In a big thunderstorm cloud, there are now strong upward winds and downward winds happening at the same time. These are called updrafts and downdrafts. This is the most dangerous stage of the storm, when tornadoes, hail, winds and flooding can happen. Updrafts continue to fuel the storm with warm, moist air. But, once a storm runs out of updrafts, it starts to weaken.
What is a squall line?
A squall line is a group of storms arranged in a line, often accompanied by “squalls” of high wind and heavy rain.
A squall line is a group of cold fronts that occur back to back across a wide area over a short time.
A squall line is a warm front that brings temperatures to a "squall" causing record breaking heat waves.
A squall line is a sea breeze that brings cold air currents from the ocean to land, which birds often ride to shore.
The answer is "A squall line is a group of storms arranged in a line, often accompanied by “squalls” of high wind and heavy rain."
A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
Thunderstorms are caused by moisture and differences in air pressure. Remember that warm air rises and cold air sinks. When warm, moist air is near the ground and cold, dry air is up above, convection will create unstable air currents where high pressure and low pressure systems meet. In a big thunderstorm cloud, there are now strong upward winds and downward winds happening at the same time. These are called updrafts and downdrafts. This is the most dangerous stage of the storm, when tornadoes, hail, winds and flooding can happen. Updrafts continue to fuel the storm with warm, moist air. But, once a storm runs out of updrafts, it starts to weaken.
Where do thunderstorms occur?
all of these
where there is a difference in air pressure and high moisture
where a warm front meets a cold front
where moist warm air is on the ground and cold dry air is above
The answer is "all of these."
A front represents a boundary between two different air masses, such as warm and cold air. If cold air is advancing into warm air, a cold front is present. On the other hand, if a cold air mass is retreating and warm air is advancing, a warm front exists.
Thunderstorms are caused by moisture and differences in air pressure. Remember that warm air rises and cold air sinks. When warm, moist air is near the ground and cold, dry air is up above, convection will create unstable air currents where high pressure and low pressure systems meet. In a big thunderstorm cloud, there are now strong upward winds and downward winds happening at the same time. These are called updrafts and downdrafts. This is the most dangerous stage of the storm, when tornadoes, hail, winds and flooding can happen. Updrafts continue to fuel the storm with warm, moist air. But, once a storm runs out of updrafts, it starts to weaken.