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drag the tiles to the boxes to form correct pairs.
raya is a gardening enthusiast who is looking to buy a new house. she wonders whether her house plants will grow well if she buys an
apartment on a higher floor. she remembers that her friend jenn also has a small garden on her balcony, and her plants seem healthy.
raya conducts an experiment to study the effect of altitude on the growth of plants. she gathers plant samples and places them on five different
floors of a 20-story building. identify the basic components of raya's experiment, including the confounding variable.
observation
hypothesis
relationship to be tested
dependent variable
independent variable
confounding variable
eliminating a confounding variable

Rosa records the distance that a toy car rolls and the time it takes to cover the distance. what scientific practice is this? collecting data asking a question providing explanations communicating results

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong