7. Which of the following was used to provide the oldest measurement of Earth's age?

A. Isotopic dating of meteor fragments

B. Relative dating of fossils in stratigraphic layers

C. Carbon dating of fossils from the Cambrian period

D. Isotopic dating of fossils from the Cambrian period

In a scientific experiment, a is any factor that can be changed or be changed

Is our world actually shaped as a globe

Renaldo and nasreen build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. when they test the electromagnet, it can pick up 6 paper clips. their teacher wants all groups to pick up at least 10 paper clips. what could renaldo and nasreen do to increase the number of paper clips their electromagnet picks up?