Which sphere exists because of there is liquid iron as part of the earth's core?

What evidence is there that convection occurs in earth’s troposphere?

Question 1 of 102 pointswhich best describes adaptive radiation? oa. geographical isolation caused by an adaptationob. biodiversity resulting from few ancestorsoc. a decrease in the rate of speciationd. adaptations that organisms teach each other

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity