Weather Vanes.  What is a weather vane? A weather vane is used to determine the direction of wind. It is also called a wind vane.  Why is it important.

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Presentation transcript:

Weather Vanes

 What is a weather vane? A weather vane is used to determine the direction of wind. It is also called a wind vane.  Why is it important to know the direction of wind? It can help predict the weather. Wind coming from different directions will bring different types of weather.

 Most weather vanes are made to point in the direction the wind is coming FROM. This means that if the weather vane is pointing east, it is an east wind.

 For example: If wind is coming from the south it will be warmer, making the temperature rise (warmer weather).  If the wind is coming from the north it will be colder, the temperature will drop (cooler weather).

 Mostly used at airports, this will point in the opposite direction of the wind.  If the sock is pointing to the west, it means that the wind is blowing from the east.

 9Vo

 1 paper plates  1 straw  1 pencil  1 straight pin  Small piece of poster board  Small piece of clay  Glue

 Step 1: Put your paper plate upside down and mark north, east, west and south on the plate. Make sure they are distanced equally apart.  Step 2: Using a ruler measure a 4 cm triangle from the poster board, and one 6 cm square. Cut both shapes out.  Step 3: Make two small cuts in the plastic straw.

 Step 4: Insert the triangle and square into the small slits in the straw.  Step 5: Push the straight pin in through the middle of the straw, and the middle of the eraser on your pencil. Make sure you leave space between the straw and pencil.