Our Milky way galaxy is a spiral galaxy. Contains over 100 billion stars. Is on
ID: 79464 • Letter: O
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Our Milky way galaxy is a spiral galaxy. Contains over 100 billion stars. Is on a collision course with Andromeda. All of the above are true. There are over 500 billion galaxies in the Universe. This estimate is based on a time-lapse photograph called the pillars of Creation pale Blue Dot. Hubble Ultra Deep Field. Magellan Deep space Array. Why are the galaxies moving away from each other? left-over momentum from the initial explosion that started the Universe. The expansion of space itself due to Dark Energy. Dark Matter repelling Ordinary Matter, None of the above. What is responsible for the formation of our solar system out of the dust of a Supernova? Gravity. Solar wind. Electromagnetism. Natural selection. Gold is very rare because heavy elements can only be made under high pressure deep in the Earth between plates in the Earth's crust. By the heat inside a volcano. When a bi, old star explodes the radioactive isotope "R" decays into the stable form "S" the half-life of "R" is 40 million years. Chemical analysis reveals that a rock contains 50 units "R" and 50 units of "S" How old is the rock? 20 million years 40 million years 60 million years 40 million years 80 million years Global warming is due part to the heat trapping properties of carbon dioxide. What percentage of our atmosphere is CO_2? 77% 21% 3% less than 0.1%. The half-life of an element is affected by temperature. Pressure. The size of the element's nucleus. All of these above. One of the reasons dinosaurs becomes so successful on land was because reptiles had homoeothermic amniotes eggs. External fertilization. Internal development. Most scientists agree that the first step in the origin of life on Earth was the evolution of membranes. Genetic material. Metabolic pathways. It is not at all clear which came first. Short polypeptide chains placed in water will from "microspheres." Microspheres are "cell-like' in the sense that microspheres grow and divide spontaneously. Surround and protect RNA. Organize biochemical pathways along their internal membranes. None of the above. Which of these methods enables us to study the origin of life billions of years ago. Looking at fossils Looking at distant galaxies. Lab simulation experiments. All of the above. The first genetic material was thought to have been most similar in structure to RNA DNA proteins enzymes.Explanation / Answer
26. OUR MILKY WAY GALAXY:
ANSWER: ALL OF THE ABOVE ARE TRUE.
it is a spiral galaxy which contains million of stars and due to collision with andromeda it is created. it is huge.
29. what is responsible for the formation of our solar system out of the dust of a supernova
answer : C) electromagnatism.
30.gold is very rare because heavy elements can only be made?
answer: D) WHEN A BIG OLD STAR EXPLODES. gold would mostly stay on the core of the planets.this is result of nuclear processes occurring during a supernova.
32. answer is D. LESS THAN 0.1%. IT IS ACTUALLY APPROX NOW 0.04% CO2 IN ATMOSPHERE.400 parts per million
38. answer is THE FIRST GENETIC MATERIAL WAS THOUGHT TO HAVE BEEN MOST SIMILAR IN STRUCTURE TO A) RNA. RNA is thought to have been formed first on mud flats along the ocean edge
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