Protists are least similar to bacteria because all the others are eukaryotic cells. Bacteria are prokaryotic.
Answer: Nuclear fusion
Reasoning: most of a stars life is in the main sequence phase. This is the phase where nuclear fusion turns hydrogen into helium.
Answer:
B. kinetic energy
Explanation:
Kinetic energy is the energy of movement. Thermal energy is the energy of heat. The hotter a compound gets the more space the molecules have, this allows for increased movement.
Answer:
FALSE
Explanation:
But carbon-14 dating won't work on dinosaur bones. The half-life of carbon-14 is only 5,730 years, so carbon-14 dating is only effective on samples that are less than 50,000 years old. Dinosaur bones, on the other hand, are millions of years old -- some fossils are billions of years old. To determine the ages of these specimens, scientists need an isotope with a very long half-life. Some of the isotopes used for this purpose are uranium-238, uranium-235 and potassium-40, each of which has a half-life of more than a million years.
