"A star at the stage in its life cycle when it stops burning Hydrogen, begins
burning bigger elements, and the gas is separating from the core..and
grows much bigger to a large star." What stage in the life cycle does this
describe?
Supernova
Main sequence
Black hole
Red giant or Red supergiant
Answers: 3
Biology, 21.06.2019 14:00
Ahypothesis that has been tested again and again , with similar results each time may become a law , true or false
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To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:
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Biology, 22.06.2019 06:30
Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.
Answers: 3
Biology, 22.06.2019 18:00
The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .
Answers: 1
"A star at the stage in its life cycle when it stops burning Hydrogen, begins
burning bigger elemen...
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