Choose one of the following household acids: vinegar, lemon juice, fruit juice, vegetable juice, carbonated water, or soda
choose one of the following household bases: baking soda, baking powder, ammonia ( be careful if you use ammonia), liquid soap
find a small plastic container or a small cup and place a small amount of your chosen acid and chosen base inside. answer the following questions in 150-200 words:
what acid and base did you choose?
do you think these are considered weak acids/bases or strong acids/bases?
what do you think will occur when your acid and base are mixed?
what reaction did occur?

Mantle convection is the process that drives plate tectonics. the theory of plate tectonics states that the crust is divided into plates that float on the semi molten mantle below. the circular motion of the magma as it slowly rises and falls or move though convection cells drags the plates along causing them to move. the heat source in the lamp would represent the earth's core. the core is the source of energy that drives convection in the mantle. the lava represents molten magma under the earth's surface. if the lava lamp had floating pieces they would move as the circular motion of the lava in the lamp as it rises and falls would move them along the surface. these floating pieces would represent pieces of the earth's crust. 

The answer i think is d

The area of the indian subcontinent is 4.4 million km^2 whereas the usa is  9.8 million  km²