Why is coal considered to be a nonrenewable energy resource? A.
Sunlight is the original source of energy for coal
B.
The burning of coal could cause environmental pollution
C.
Once coal is mined, it can take millions of years to be replaced
D. Coal is abundant, but is very expensive to mine from underground

Asap timed! 1. ice core samples from glaciers ice caps contain bubbles of ancient atmosphere that are in layers based on age. what questions are scientists most interested in? a. how the amount of water vapor needed to make the ice has changed b. how the amount of ozone has changed over time.c. how the amount of ice in each layer has changed over time d. how the amount of carbon dioxide has changed over time 2. what produces milankovich cycles ? a. sunspots ams solar flare on the suns surface b. changes in the earths orbit c. gravitational changes bases on the position of the sun and the moond. cycles of vegetation that result in desert and rainforest conditions

Select the correct answer from each drop-down menu proteins are

All ova contain sex chromosomes corresponding to: x y xx xy