Answer: 1)Spiral galaxies are a class of galaxies originally described by astronomer Edwin Hubble in his 1936 work The Realm of the Nebulae.
2) They are part of the Hubble sequence a morphological classification scheme for galaxies.
3) Spiral galaxies usually consist of a rotating disk that contains stars, dust, gas, and a concentration of stars known as the bulge in the center.
4) These bulges are often surrounded by a faint halo of stars, many of which reside in globular clusters – a spherical collection of stars that orbits a galactic core.
5) As such, Spiral galaxies are named after their spiral structures that extend from the center into a galactic disk.
6) They have spiral arms – sites of ongoing star formation that are brighter than the surrounding disk due to the presence of young OB stars that inhabit them.
Explanation:
<u>Answer:</u>
Geologists have sorted earth’s history into different geologic time scale. They just clubbed it into time scales by observing the major changes in the life forms that existed on the earth. Inferring to the fossils found in rocks the time scale was calculated.
First era single cell animals were formed then formed the complex animals.Then Mesozoic era where it is known as the era of dinosaurs. Then the evolution of different species of life during Cenozoic era. These major changes found through fossils helped them to form the GTS.
Answer:
it signifies delayed response to the victim, that there is no sign of any life threatening injury , but it is needed to check for any noticeable signs of external injuries.
Explanation:
Jump-start algorithm are generally used to sort children into categories based on the degree or extent of the injuries in multiple -causality situations.
it is applicable to children from infancy to age 8yrs,
It is divided into 4-categories called Triage categories,with certain 4- colors where each indicates the extent of severity of the child conditions represented with tags.
Thus Red- tag indicated need for urgent medical attention,because of life threatening injuries.
Yellow indicated although medical attention is needed, the injury is not life threatening. Intervention may be delayed for few hours.
Green-indicated minor injury, that is not so serious,medical intervention may be delayed for some days
Black indicated diseased or the injury is so severe that the life of the victim can not be saved with available resources.
Answer:
c. 1 and 6
Explanation:
the atomic number if carbon is 6 and it's in group 1
<span>The body proportions of neanderthals may have arisen as adaptations to a HARSH AND CONTINUOUSLY CHANGING environment. Neanderthals that have evolved through millions of years have developed skills and techniques in order for them to eat, live in good conditions, and protect themselves from dangers of the environment. As such, their physical bodies have also evolved through the activities that they do on a regular basis.</span>
