instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Some meteorites are made of iron and nickel and are thought to be very similar to the core of the earth.
answer:
Some meteorites are made of iron and nickel and are thought to be very similar to what part of the earth?

question:
Platelets blood component serves both structural and molecular functions in blood clotting.
answer:
What blood component serves both structural and molecular functions in blood clotting?

question:
Potential energy is stored in an object because of its position or shape.
answer:
What type of energy is stored in an object because of its position or shape?