A/an is a type of research that involves observation and collecting data but does not include a control. a. independent variable b. experimentation c. dependent variable d. investigation

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.