Is mixing vanilla and eggs into a butter and sugar mixture a chemical or physical change

Which of the following mining methods disrupts the sea floor?

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland