Answer: 1.A food web is multiple food chains and an energy pyramid shows how energy moves through trophic levels.
Explanation:
When the heated part of the mantle rises through the cooler part , this is an example of Convection.
Answer:
I believe it is Hubble's law but I could be wrong
How a bridge is built at the base can affect how far it can extend.
Scientific validity is the applicability of a conclusion drawn in the context of a scientific experiment to the world at large.