During a number talk, students are thinking, asking their peers questions, and explaining their own thinking all while the teacher records the thinking. Sherry Parish has written the book Number Talks (Amazon affiliate link) and it offers awesome ideas for Kindergarten to 6th grade. It is definitely an expensive (up to $60 if bought new) but offers great ideas and real-life examples of Number Talks.
noun. Avalanche warning signs. Avalanche warning signs. The definition of avalanche means a massive quantity of something that comes suddenly such as snow, ice, earth or rocks that come loose and speed down a mountain. 1  An example of avalanche is a glacier that splits from a cliff face and hurdles down the side of a mountain.
Science Articles & Cool Facts. Fact: High Speed Avalanches. Although an avalanche can mean the fall of any material e.g. snow, soil and even rocks, in common usage it generally refers to a falling mass of ice and snow which breaks away from the side of a mountain or cliff and surges down at great speed. So how fast do they really travel ? Well a dry snow avalanche can travel at speeds of up to 225 mph with a force equaling that of a hurricane. Whatâs more interesting is that as the powdery snow hurtles downhill a further blast of air just as destructive may be sent out ahead of the avalanche.