My grass is dying, and I believe it's because it is not getting enough water. So I decide to conduct an experiment by watering the backyard everyday for two
weeks, while leaving my front yard alone. After two weeks I measure the length
of my grass to determine which grew better. What variable(s) should be
controlled?

a. amount of sunlight
b. temperature
c. type of grass
d. all of the above

C

Explanation:

what if its not the same grass every week end

it has to be C

Explanation:

because you can't control the amount of temperature your grass has unless you cover it which would be odd. and the sunlight is going to be on your grass regardless of anything

that would be because of both gravity and friction. so     c

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas