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.
Sweeny is located in Brazoria County, Texas, and is the westernmost incorporated city in Brazoria County. The area is commonly referred to as the West Brazos Area, and is situated along the Upper Gulf Coast of Texas between Matagorda County and Galveston County. Sweeny is only 20 miles from the Gulf of Mexico.