So well-designed research studies will have clearly defined variables—independent, dependent, and controlled—that help scientists identify what’s changing and what's causing the change.
So well-designed research studies will have clearly defined variables—independent, dependent, and controlled—that help scientists identify what’s changing and what's causing the change.
I know, for example, that time and space are the same thing, and that it is possible that all moments in time exist simultaneously, which means I am just born and a kid and an old lady and just plain dead and have never even existed, all at the same moment, right now.
I say, “Most of the time, when people drink their pee, it’s because they have to. Like because they’re trapped under rubble or something. But some people do it because they think it's good for them.”
a genetically identical organism derived from a single cell
And if you injure a jellyfish, you might find hundreds of little clones floating about, tiny replicas generated one after another from the damaged tissue, as if spit out from a 3-D printer.
And if you injure a jellyfish, you might find hundreds of little clones floating about, tiny replicas generated one after another from the damaged tissue, as if spit out from a 3-D printer.
I listen to the noises in the cafeteria—the clamor of kids, the slam of lockers, the crumpling of brown paper bags, the shouts from lunch monitors: “No running,” “Pick up your trash, please,” “Cafeteria trays are not to be used as weapons, please.”
A bunch of the science reports were interesting—Molly did her report about scoliosis; she held up X-ray images of her sister’s back, showed us how her sister’s spine bent in slow curves like a lazy river.
I hear the rustling of classmates. The urgent, high-pitched flutter of cricket wings, the up-and-down melody of songbirds, the first who-whooo of an owl.
the number of occurrences within a given time period
Then Mr. Andrews explains that sounds at low frequencies travel farther than sounds at high frequencies, and that is why you can always hear the beat of a drum from a faraway parade sooner than you can hear the rest of the band.
I am supposed to know other things. Like how to clip a barrette to the front of my hair so it looks cute-but-not-babyish. Or how to walk in packs and how to squeal at campfire sparks and how to stand near boys with my hip jutting out.
I am supposed to know the perfect thing to say when later, you walk past me with Jenna and she sneers, "An orchestra,” as if orchestra referred to a clump of maggots crawling over one another at the bottom of a trash can.