Any mixture that contains more than one phase of matter is a heterogeneous mixture. Sometimes this can be tricky, because a change of conditions can alter a mixture. For example, an unopened soda in a bottle has a uniform composition and is a homogeneous mixture. Once you open the bottle, bubbles appear in the liquid.
Pearland is located in northern Brazoria County at 29Â°33â²16â³N 95Â°17â²45â³W / 29.55444Â°N 95.29583Â°W / 29.55444; -95.29583 (29.554349, â95.295959) south of Houston. Portions of the city extend north into Harris County, and a smaller portion extends west into Fort Bend County.
Brazoria County is among a number of counties that are part of the region known as the Texas Coastal Bend. Its county seat is Angleton, and its largest city is Pearland. Brazoria County, like nearby Brazos County, takes its name from the Brazos River. The county also includes what was once Velasco, Texas, which was the first capital of the Republic of Texas.