Lesson 2- Things Move Through Air Air Pressure Unit Lesson 2- Things Move Through Air

Objective We will be able to use the scientific method to communicate observations about falling objects.  Objective 1 Generating Evidence: Using the processes of scientific investigation (i.e. framing questions, designing investigations, conducting investigations, collecting data, drawing conclusions) Button to show lessons. Framing questions: Observe using senses, create a hypothesis, and focus a question that can lead to an investigation. Designing investigations: Consider reasons that support ideas, identify ways to gather information that could test ideas, design fair tests, share designs with peers for input and refinement. Conducting investigations: Observe, manipulate, measure, describe. Collecting data: Deciding what data to collect and how to organize, record, and manipulate the data. Drawing conclusions: Analyzing data, making conclusions connected to the data or the evidence gathered, identifying limitations or conclusions, identifying future questions to investigate. Standard 3 Physical Science. Students will gain an understanding of Physical Science through the study of the forces of motion and the properties of materials.   Communicate observations about falling objects.  Observe falling objects and identify things that prevent them from reaching the ground. Communicate observations that similar objects of varying masses fall at the same rate. Objective 2 Compare and contrast the differences in how different materials respond to change.

Vocabulary Words gravity – is what keeps you on the ground and what causes objects to fall. air- The mixture of gases, which form the atmosphere of the Earth. air pressure - The weight of air pressing down on earth.

Things move through the air Birds, bats, parachutes, and helicopters are all things that move through the air. Why are they able to fly through the air? They all have different shapes and they all have different sizes.

Move Through the Air Experiment Directions: gather 2 sheets of paper leave one as is and crumble the other one hold your arms out at the same level with the crumpled paper in one hand and the flat sheet in the other hand. STOP! – LET’S USE THE SCIENTIFIC METHOD. Teacher demonstration only

Move Through the Air Experiment Question – What will happen if I drop both pieces of paper at the same time? Hypothesis- Discuss your hypothesis with a partner. Release both papers at the same time after the hypothesis discussion Those are all great ideas. Now we’ll see if any of them will happen. Release both papers at the same time.

Move Through the Air Experiment Results – What happened? Did both pieces of paper land at the same time or different times? Discuss with your partner what you observed. Why did they fall differently? Discuss with your partner. Release both papers at the same time after the hypothesis discussion Why did they fall differently: explain that air pushes against the paper as it falls. The flat sheet has more air pushing on it and falls more slowly than the crumpled paper. Air pushes against the paper as it falls. The flat sheet has more air pushing on it and falls more slowly than the crumpled paper.

Move Through the Air Experiment Results – What happened? Did both pieces of paper land at the same time or different times? Discuss with your partner what you observed. Why did they fall differently? Discuss with your partner. Release both papers at the same time after the hypothesis discussion Why did they fall differently: explain that air pushes against the paper as it falls. The flat sheet has more air pushing on it and falls more slowly than the crumpled paper. Extension: 1.gather 2 new sheets of paper 2.fold one piece over and over until it is the appropriate shape of a 5-cm square, and tape the edges together with a 3-cm piece of tape. 3. gently crumple the second sheet, and stick a 3-cm piece of tape to it so both sheets have the same mass. 4. hold your arms out at the same level and drop both pieces of paper at the same time. Air pushes against the paper as it falls. The flat sheet has more air pushing on it and falls more slowly than the crumpled paper.

Things move through the air How do the eagle and fruit bat move through the air? How does the parachute move through the air? How does the helicopter move through the air? the air under their wings keeps them afloat on the air. parachutes holds it up as it floats down to earth the movement of the propeller moves it through the air

Making a Helicopter Twirler Observation- Remember the paper experiment. Question- How do helicopters stay in the air? Prediction- using the information we just learned make a prediction. What do you think is going to happen? Student Experiment

Directions We will make a paper helicopter / Rotor-copter. Student Experiment

Making a Helicopter Twirler Student Experiment

Draw Out a Plan Make a plan. How will your test your plan?

Record Your Results Write down your results and observation.

Draw Your Conclusion Describe how things tested today move through the air. I think that the helicopter stayed in the air because… I think that the helicopter twirled / floated in the air because of the the wings / rotors

Glue your scientific method paper into your science journal. Watch the video to learn more about air pressure and gravity. https://www.youtube.com/watch?v=c86xKDcy-TQ

Videos Gravity video https://www.youtube.com/watch?v=4ij5OgJatgc Air pressure Video https://www.youtube.com/watch?v=pHrCSuiz3c0