There's no telling. The BMX is probably smaller, so it should be lighter. OTOH they're often amazingly chunkily built and can be surprisingly heavy.
A street bike is a type of BMX bike, so your question can't be answered.
no but you can get a dirt bike or a cruiser bike or a speed bike but i havnt seen a bmx bike yet.
if you want a bike for trails and dirt go for an eastern trail digger or a fit bike
freestyle, dirt, street
A true race bike is probably lighter, and may have another brake set up than a "normal" BMX. also you might have different parts that make the bike itself heavier, like if you are comparing a street or dirt bike to a race bike the back rim on the street/dirt bike the axle is going to 14mm instead of 3/8 axle, but other than that theres really nothing but gearing
it matters what you are going to use it for
no bmx bikes hndelbars are 22.2 mm and mtb dirt jump are 25.4 mm. the dmr swarm stem is ment for mtb dirt jump bikes (25.4)
Justin Bieber's bike is a dirt bike. On the dirt bike it has a picture of him and his ex girlfriend. The dirt bike cost $10,000 which is a lot of money. The speed of this bike is 9 miles for 30 minutes.
Yes
HubPage offers a dirt bike game that can be played online. There are also games at BMX Bike Games, Addicting Games, and Super Games. One can also find games to buy at Amazon or the BMX website.
As a general rule if two bikes are in the same price range, the smaller of the two will be lighter. This because there is less material used in the smaller BMX due to it's much simpler construction. But, when you head for the high end, a flatland or racing bike is going to be much lighter compared to a mountain bike.
it may be a snug fit but it is doable