Weather & Water

Key Vocab Weather Model Particle

Weather: quick think What is weather? What all do you know about weather?

The condition of the atmosphere at a specific time and place Weather Definition The condition of the atmosphere at a specific time and place

Hurricane Katrina 1:55-7. S/O 2:45-2:50

Hurricane Harvey

Rotating wind/rain storm Winds from 75 to 200 mph WHAT: Rotating wind/rain storm Winds from 75 to 200 mph As big as 600 miles wide WHEN: Between June and November WHERE: Start over ocean Fizzle out over land Hand out the hurricane card and use questions like the following to make sure students understand what it shows: What does “rotating” mean? spinning; turning in circles (shown by the arrows in the upper right photo) What does the radar image show? The storm started over the ocean, on the far right side, and grew bigger and stronger as it moved toward land. What does the graph show? the number of hurricanes in each month from January through December What’s the difference between the darker and lighter areas? dark is for all hurricanes; light is for major hurricanes

WHo is more likely to experience a hurricane?

Blizzard

WHAT: Snow storm with high winds Winds from 30 to 60 mph WHERE: Usually over land WHAT: Snow storm with high winds Winds from 30 to 60 mph Over big or small area When: Between October and May in Northern H. Between May and October in Southern H. Hand out blizzard card and use questions like the following to make sure students understand what it shows: What’s the difference between a blizzard and a regular snowstorm? a blizzard has high winds as well as snow What does the radar image show? It shows a blizzard over a large area of land in New York. Why are there two graphs? One is for the Northern Hemisphere and one is for Southern. What do the graphs show? the number of blizzards in each month from January through December

WHo is more likely to get a blizzard?

How do they compare?

TORNADO 0-5:10. S/O 2:05-2:11, 3:38-3:44, 3:58-4:10

Hurricane v. Tornado

Comparing solids, liquids, & Gases

Model of Particles in Solid

Particles in a solid The particles that make up a solid move slowly, so the attractions between particles pull them tightly together. Each particle becomes part of a fixed structure. As a result, particles of solids can vibrate and wiggle in place, but they can’t move out of place.

Student Model: Solid Particles Go to the bottom of the container Stand very close together, with almost no space between particles (people) Without moving your feet, sway back-and-forth and side-to-side Every once in awhile, turn slowly to the left or the right, but make sure you stay in the same place

Pull them tightly together Data Table: Solids Yes Yes Slowly Move in one place -- Yes Pull them tightly together

Particles in a liquid The particles that make up a liquid move faster than the particles of solids. The attractions between particles pull them near each other, but the particles are able to slide past each other and move around. The particles move in random directions. It is hard to predict the path a given particle will follow, because it depends on the movements and positions of the particles around it. How do particles of a liquid move? faster than particles of solids they slide past each other and move around their movements are random; hard to predict What can you say about the attractions between liquid particles? the attractions pull them near each other, but they have room to slide past each other The paragraph says “move around,” but solid particles vibrate and wiggle, and you could also call that moving around. What’s the difference? solid particles move but stay in one place liquid particles move from place to place

Student Model: Liquid Particles Go to the bottom of the container Stand close enough to touch each other, but leave some space here and there Moving at moderate pace, slide past each other but stay close enough to touch the particles (people) around you Continue moving. Try to maintain a steady, moderate pace

Data Table: Solids Yes Yes Yes Yes Slowly Faster Move in one place Move from place to place -- Random Yes Yes Pull them tightly together Pull near each other

Particles in a gas The particles that make up a gas move very fast, so the attractions between particles have little effect. The particles are free to move away from each other, so gases contain a lot of empty space. Like liquids, the direction in movement is random. Each particle moves in a straight line until it hits something and changed direction. The difference is that gas particles move very fast and spread out in every direction.

Student Model: Gas Particles Stand far apart, with as much empty space as possible between particles (people) Moving at a fast pace, walk directly forward until you bump into another particle or an object Stop and rotate so you’re facing a different direction Repeat steps 2 & 3. Try to maintain a fast but steady pace

Data Table: Solids Yes Yes Yes Yes Yes Yes Slowly Faster Very Fast Move in one place Move from place to place Move from place to place -- Random Random Yes Yes Yes Pull them tightly together Pull near each other Little effect

Compare & Contrast Distribute the Venn diagram and the page of description boxes. Have students cut the boxes apart and find the three that are common to solids, liquids and gases. Point out that the Venn diagram has three circles -- one for solids, one for liquids, and one for gases. Where would you put something all three have in common? in the center, where all three circles overlap [Descriptions will appear separately on keypress.] Is there anything that two of the three have in common? in both liquids and gases, particles move from place to place, and their movement is random Have students find each description and figure out where they go in the Venn. What is true of solids only? the particles move slowly; they vibrate and wiggle in place; attractions pull them tightly together What is true of liquids only? the particles move kind of fast; attractions pull them near each other; the particles slide past each other What is true of gases only? the particles move very fast; attractions have little effect; the particles spread out in all directions; they contain a lot of empty space Distribute the partially completed Venn diagram and have students fill in the blanks.