<span>The relative age of a rock layer is the age of the rock compared to the ages of the rock layer while the actual age of the rock layer is the actual number of years that the rock was formed. The relative age of a rock is generally determined by geologists using the Law of Superposition where the youngest rock is at the top and the oldest rock is at the bottom of the horizontal layer. The actual age of a rock is generally determined using Radiometric Age Dating method that is based on the natural radioactive decay of rock elements.</span>
Answer: 60 percent of our energy comes from fossil fuels
Explanation: I don’t know why I just know
1 grass -2 beetle -3 bluebird-4 fox
<span>contractile vacuole
Contractile vacuoles are organelles that are responsible for excretion function. They perform osmoregulation which manages wastes, water and other needed materials in the cell. They are found in some prokaryoric organisms like the algae, protists, amoeba and other unicellular organisms.
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A hypokinetic disease is a disease associated with a lack of exercise. This disease is linked to lack of any physical activity or lack of muscular function. Diseases that are under this category would be stroke, cancer, diabetes, heart attack, obesity and back pain.