Solve the following equation: 28 ÷ 7 + 2 × 3 = ?                 a.  12      b.  18      c.  10      d.  24

Which is not a standard weather variable? a. air pressure b. moon phase c. temperature d. wind speed

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

Landmasses on a flat map look distorted because