true 1. air temperature, humidity, and air pressure. 2. air temperature and humidity 3. air temperature 4. air pressure and humidity Choose the best ending for the following statement. Weather is determined by- 1 false 1. high temperature area 2. high pressure air mass 3. high humidity air mass 4. all of these What does the "H" indicate? 2 true 1. areas of equal elevation 2. areas of equal humidity 3. areas of equal air pressure 4. all of the above What do the curved isobar lines show? 3 true 1. thermosphere 2. troposphere 3. mesosphere 4. stratosphere The layer of the atmosphere closest to the Earth is the- 2 false 1. themosphere 2. troposphere 3. mesosphere 4. stratosphere The layer of the atmosphere where clouds form is- 2 false 1. clear and sunny weather ahead 2. expect severe storms 3. a cold front is moving in 4. a warm front is moving in What does this red line with bumps indicate? 4 true 1. clear, sunny, and warm weather ahead 2. expect lots of rain 3. a cold front is moving in 4. a warm front is moving in What does this blue line with triangles indicate? 3 true 1. fronts 2. isobars 3. depressions 4. highs Boundaries between air masses are called- 1 false 1. cloudy weather with lots of rain 2. warmer temperatures 3. low air pressure 4. all of the above What does a warm front typically bring? 4 false 1. brief storms followed by sunny weather 2. cooler temperatures 3. high air pressure 4. all of the above What does a cold front typically bring? 4 false 1. warmer, but air pressure stays the same. 2. cooler and more dense, so air pressure is higher. 3. cooler and less dense, so air pressure is lower. 4. cooler, but air pressure stays the same. On the top of a mountain, the air is typically- 3 false 1. stratus 2. cirrus 3. cumulous 4. all of the above Which clouds usually bring rainy weather? 1 false 1. stratus 2. cirrus 3. cumulous 4. all of the above Which clouds form from tiny ice crystals high in the atmosphere? 2 false 1. carbon 2. ozone 3. oxygen 4. nitrogen What substance found in the upper atmosphere shields the Earth and protects us from harmful radiation? 2 false 1. it is a form of oxygen 2. it is a harmful pollutant when it forms near the Earth's surface 3. it poses no risk to humans 4. the ozone layer protects us from harmful radiation What is NOT true about ozone? 3 false