Hurry! Which of the following statements is true? The crust below the continents is made of basalt and salt sediment.
According to continental drift theory, the continents used to be joined together.
The crust below the continents is thinner than the crust below the ocean.
The Earth's tilted axis is the main reason for day and night.

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what