"This looks like a biology worksheet."
"This looks like US History homework."
Yes, for the first time this year, I had my students do matching. Matching.
It was after we did a quick lab trying to figure out whether period or amplitude affects the speed of a wave. It wasn't a great lab. I've never gotten great results from the long springs with just pulses. But, still, it's good to play around with the wave, to see the pulse in real life, and to try to calculate its speed.
Then I had many vocabulary words to introduce, like longitudinal wave, direction of disturbance, and trough. I wish I could get around this, but the unit of waves doesn't make coherent sense to me yet like the rest of the AP curriculum. I'm not sure what the overarching theme is. So getting through the vocabulary that isn't really that important, and doing so quickly, seemed like an OK idea.