BP: Weather

What will happen if the relative humidity is 100%, and the temperature begins falling?

• The air will be sticky and uncomfortable
• It will start to rain
• The temperature will rise
• The aromatic pressure will rise

If the air is only holding one-third as much moisture as it can possibly hold, what is the relative humidity?

• 50%
• 25%
• 33%
• 67%

What are the characteristics of a high-pressure system?

• Wind and rain
• Clear skies and sun
• Humidity and thunder
• Extremely hot temperatures

Why does it tend to be cool at the Earth's poles?

• They have the worst weather
• The are furthest from the sun
• Sunlight strikes them at extreme angles
• They have high absolute humidity

What is the difference between absolute humidity and relative humidity?

• Absolute humidity is expressed as a percentage; relative humidity is expressed as a whole number
• Absolute humidity is how much water the air can hold; relative humidity represents how much water the air actually holds
• Relative humidity makes the air sticky;  absolute humidity makes the air dry
• Relative humidity is how much water the air can hold; absolute humidity represents how much water the air actually holds

Why can't you see the water vapor in the air?a

• There is very little of it
• It exists as a clear, colorless gas
• It's all far away, in the upper atmosphere
• It's all been condensed

If it's a hot day outside, what can you conclude?

• The wind will blow extremely fast
• The air will be able to hold very little moisture
• There will probably be a lot of clouds
• The air be able to hold a lot of moisture

Which of the following instruments measures air pressure?

• thermometer
• barometer
• wind vane
• anemometer

Why is the temperature lower at night than during the day?

• There is less water in the air at night
• The temperature depends on energy from the sun
• Winds blow harder at night
• There are more clouds at night to block the sun's rays

What is weather?

• The state of the atmosphere at any particular time
• The amount of moisture in the air
• The number of clouds in the sky
• The speed of the wind