Question 9 9. The motions of comets ans asteroids in our solar system are
predictable because they are
A. smaller than planets
B. nearly spherical in shape
C. in orbit around the sun
D. controlled by Earth's gravity

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy