The two basic properties of all matter are and . options for first blank
a. length B. volume
options for second blank
a. density B. mass

18. use the activity series to predict whether the following synthesis reaction will occur. write the chemical equations for the reaction if it's predicted to occur. (s) + o2(g) -> *note: it is possible.*

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.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?