Earth Science Weather & Water Ms. Longo Earth Science Weather & Water

9/8

Agenda Weather summary Meteorology careers HW Bring and old metal fork to class (optional) Get weather report for your 2nd city

Do Now Add a line of learning under FQ 1.2, and add a summary of what you now know about weather. Use your 3 notes Notebook maintenance

Weather Summary Please add these ideas below your summary if you do not have them in your notes or summary: Weather is all the conditions at one time in one place. Weather conditions that can be measured include temperature, air pressure, and humidity. Weather is not the same as climate.

Meteorologists Handout

Vocabulary Review Forecast Meteorologist Meteorology Severe weather Wind

9/9

Agenda HW check: FQ 2.1 Air Investigation Weather report for your 2nd city FQ 2.1 Air Investigation

Do Now NB Maintenance Open your notebook to your 2nd city weather report

Air Introduction Think about the extreme weather we saw in the video. What were some of the phenomena we saw? What is wind and what is it made of? To understand wind, we need to understand air. In investigation 1, we learned about some tools to measure weather conditions. Air has an important role in weather, for the next few days we will look closely at air to learn some of its properties.

FQ 2.1 What is Air? Please add this new Focus Question to your NB

NB sheet 2, Air Investigation Attach this page to the next clean page in your NB.

Syringes We will be using syringes to investigate air. You may use them as long as you do not use them to annoy another student.

Air Investigation- 3 minutes Be prepared to answer these questions: What happens to the air in the syringe when you push and pull on the plunger? What can air do? Record 3 observations on NB sheet 2 Record 3 questions on NB sheet 2

Air Investigation- 10 minutes Be prepared to answer these questions: What is inside the barrel of the syringe when you clamp it shut? Does air take up space? What evidence can you use to demonstrate that air takes up space?

Air Observation Discussions Be prepared to answer these questions: When you clamp the tube closed and push the plunger down, what happens to the air? Is there more air, less air, or the same amount of air in the syringe when the air is pushed into a smaller space?

Air Observation Discussions Be prepared to answer these questions: What happens when you let go of the plunger after pushing it down? What do you think happens to the air when it is pushed into a smaller space? If you pull the plunger out, why does the plunger move back into the tube when you release the plunger?

Vocabulary Compress Pressure Expand Make a diagram of the syringe activity as part of your definition.

Trapped Air Pull the plunger out of the barrel Put a bubble in the barrel, put the plunger back in halfway, and clamp off the syringe. Expand and compress the air. Be prepared to answer these questions: What happens to the bubble when the plunger is pushed in? Why does this happen?

Gas in a Syringe Watch the online activity, and be prepared to answer questions.

Particle Everything is made out of particles (atoms & molecules), including air. The particles in gases are free to move around throughout the volume of gas. There is a lot of space between the particles in gases. Compressing a volume of gas into a smaller space pushes the particles closer together. The number of particles is the same; they are just closer together. The size of the particles isn’t any smaller; there is just less space between them.

Particle Particles compressed into a smaller space bump into one another and the sides of the container more often. Just like when a basketball hits you and bounces off, you feel a push, each time a particle collides with the sides of the syringe or the plunger, it gives a tiny push. All these pushes are what create air pressure. Because these air particles are bouncing around in all direction, air pressure pushes in all directions. If the force keeping the gas compressed is reduced, the gas will expand into a larger space, and the particles will get farther apart.

Gas in a Syringe Discussion Explain your observations with the syringe an plunger using the concepts of particle collisions and air pressure. Group Questions: Why can’t you push the plunger all the way to the end of the syringe barrel when the tube is clamped off? What caused the plunger to move back out when you release it after you have pushed it in? What causes the plunger to move back in after you have pulled it out?

Do Now Syringe diagram