Which is required for convection to occur? a solid substance
a heat source
boiling water
air molecules

Asap 1. which surface feature of the moon is characterized by mountainous areas? question options: maria terrae regolith craters 2.which statement describes surface features called maria on the moon? question options: layers of dust and rock deep areas of cooled lava deep, rocky and barren valleys highlands and mountainous areas

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2