PLEASE PLEASE help:( James wants to model convection currents that cause lithospheric plates to move. Which model would be the best choice?

Question 11 options:

push two pieces of milky way together and observe the results

heat vegetable soup in a glass beaker using a hot plate and observe the results

heat vegetable soup in a glass beaker using a heat lamp and observe the results

pull two pieces of milky way apart and observe the results

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?