Erosion happens when natural forces alter the landscape. What does it mean to alter a landscape? a
To blow dust around

b
To change what land looks like

c
To deposit silt at the mount of a river

d
To create a floodplain

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