1. ☁: ________________________
2. ☁: ________________________
3. ☁: ________________________
4. What is the difference between weather and climate?
5. Explain what happens to sea surface temperatures in the western Pacific during an El Niño.
6. Explain what happens to precipitation in the western Pacific during an El Niño.
7. Explain what happens to sea surface temperatures in the western Pacific during an La Niña.
8. Explain what happens to precipitation in the western Pacific during an La Niña.
9. What is the current ENSO state: El Niño, La Niña, or ENSO neutral?
10. With respect to storms in the western Pacific, what is the "El Niño, box"?
11. A wave was inscribed on poster paper by a RipStik.
    
    1. On the diagram above, label a crest.
    2. On the diagram above, label a trough.
    3. λ = _________ _________ What is the wavelength λ of ONE wave?
    4. a = _________ _________ What is the amplitude a?
    5. τ = _________ _________ As seen in the diagram, the RipStik took 1.45 seconds to swizzle (wiggle) 2.5 times. What is the period τ of ONE wave?
    6. f = _________ _________ What is the frequency f of the RipStik wave?
    7. ѵ_wave = _________ _________ What is the wave velocity ѵ_wave?
12. A ball bounces 40 times in 10 seconds.
    
    1. τ = _________ _________What is the period of the bouncing ball?
    2. f = _________ _________ What is the frequency for the bouncing ball?
13. During laboratory nine, the measuring of the speed of sound, students out at 400 meters heard the clap 1.11 seconds after they saw the boards collide .
    1. velocity ѵ = _________ _________ Based only on that measurement, what was the experimental speed of sound?
    2. raw error = _________ _________ Given that the actual speed of sound that day was 350 m/s, what is the raw error?
    3. % error = _____________ Given that the actual speed of sound that day was 350 m/s, what is the percentage error?

period τ = 1 ÷ (period τ)
frequency f = 1 ÷ (frequency f )
velocity ѵ = wavelength λ * frequency f