Download DO NOT WRITE ON THIS PAPER Standard 1 Objective 1 Study

DO NOT WRITE ON THIS PAPER
Standard 1 Objective 1 Study Notes
Big Bang Theory
1. Light from stars support the Big Bang Theory because it shows that most objects in space
are moving away from one another.
2. The spectrum of hydrogen on a distant star is red shifted.
3. Stars farthest from Earth with the greatest speed have the greatest red shift.
4. Scientists accept the Big Bang theory because evidence supports it.
5. The big bang started when all matter in the universe burst from a tiny point.
6. A star moving away from Earth has a spectrum that is shifted toward red.
7. Hubble’s discovery that there was red shift in the spectra of galaxies led to an
understanding that the universe is expanding.
8. Astronomers believe that cosmic background radiation formed shortly after the big bang.
9. The event which began the universe was the big bang.
10.The two elements that formed in the big bang are hydrogen and helium.
11.Scientific explanation for the origin of the universe relies on evidence from starlight and
other types of radiation.
12.Technology helped Hubble make his discovery by using telescopes that collected
accurate data from space.
13.Cosmic Microwave Background Radiation supports the Big Bang theory because it is
energy left behind from the Big Bang explosion in the form of radiation.
14.Much of the evidence for the Big Bang theory depends on understanding the data
gathered with technology.
Nebular Theory
15.The time it takes for half of a sample of a radioactive isotope to decay is called a Halflife.
16.Radioactive dating is used to determine the absolute age of rocks because radioactive
decay happens at a relatively constant rate.
17.Radiometric dating is determining the age of a substance by comparison of the ratio of
parent to daughter isotopes is.
18.In radiometric dating scientists compare the proportion of a radioactive parent isotope to
a stable daughter isotope.
19.According to the nebular theory the solar system formed as a cloud of spinning dust and
gas condensed into the sun and planets.
20.Meteorites that fall to Earth support the nebular theory because the meteorites are the
same age and composition as Earth.
21.A rotating cloud of gas and dust from which Earth’s solar system formed is called a solar
nebula.
22.Copernicus proposed a heliocentric model of the solar system in which the planets
revolve at different speeds around the sun.
23.The heavy elements that make up Earth came from evolving/exploding stars.
24.The atoms in a star become heavier each time it goes through a life stage.
25.A star produces all the heavier atoms found in the universe when it undergoes a “nova” or
“supernova” explosion.
26.Bright new stars found in the remains of exploded star systems are made from the
elements produced by the exploded stars.
27.Centuries ago, people thought that Earth was the center of the universe and that the sun
and moon went around it because the sun and moon appear to go around Earth.
28.Galileo went to jail for publishing evidence that supported the sun-centered solar system
theory because his ideas opposed the cultural and religious practices of his time.
29.Technology has contributed to our understanding of the solar system by allowing new
types of data to be collected more quickly.
30.Telescopes have been sent to space because ground-based telescopes experience
interference from Earth’s atmosphere.