weather [wind] [5] [comprehension quiz]

The next thing we have to consider is what happens when these air masses meet as in this animation. A weather front is simply the boundary between two air masses. Cold front This is the boundary between warm air and cold air and is where cold air is replacing warm air at a point on the Earth's surface. Warm front This is the boundary between cold air and warm air and is when warm air replaces cold air at a point on the Earth's surface. Occluded front An occluded front occurs when the cold front 'catches up' with the warm front. The warm air is then squashed upwards from the surface, by two cold air masses. Stationary front Sometimes air masses exert similar strength forces on each other and no one wins. When no movement occurs and you get a stationary front.

1. What is a weather front? when hot air rises a band of rain between two cold air masses a boundary between two air masses 2. How many types of weather front are there? 2 3 4 3. What is a stationary front? when there is no movement of either air mass when warm air replaces cold air when cold air replaces warm air 4. What is a warm front? when warm air replaces cold air when there is no movement of either air mass when cold air replaces warm air 5. What is a cold front? when there is no movement of either air mass when cold air replaces warm air when warm air replaces cold air

There are 6 pictures in a grid. As you hover over each picture a blue screen appears on which there is some information about what is being shown in the picture. Read this information and look at each picture to make sure you understand what is being shown. If you want to check how much you understand try the quiz on the right hand side. To start the activity again just refresh the page.