Unit 11 Universe

What is the name of the theory that explains the origin of the universe as a rapid expansion from a hot, dense state?

• Steady State Theory

• Big Bang Theory

• Nebular Hypothesis

• String Theory

Which of the following is considered strong evidence supporting the Big Bang Theory?

• The existence of black holes

• Cosmic Microwave Background Radiation

• The presence of comets

• The shape of the Earth

Which type of galaxy is characterized by a flat, rotating disk with spiral arms?

• Elliptical Galaxy

• Irregular Galaxy

• Spiral Galaxy

• Lenticular Galaxy

What is the first stage in the life cycle of a star?

• Main Sequence

• Red Giant

• Nebula

• White Dwarf

On an HR diagram, what does the y-axis typically represent?

• Surface temperature

• Luminosity

• Age

• Mass

Which of the following lists the objects in order from smallest to largest?

• Star, Planet, Moon, Galaxy

• Moon, Planet, Star, Galaxy

• Galaxy, Star, Planet, Moon

• Planet, Galaxy, Moon, Star

Which telescope is designed to observe the universe in infrared wavelengths and was launched in 2021?

• Hubble Space Telescope

• James Webb Space Telescope

• Chandra X-ray Observatory

• Spitzer Space Telescope

Which element is most abundant in the universe and was formed shortly after the Big Bang?

• Oxygen

• Hydrogen

• Carbon

• Iron

Which of the following best describes a main sequence star?

• A star that is forming from a nebula

• A star that is fusing hydrogen into helium in its core

• A star that has exhausted its nuclear fuel

• A star that is collapsing into a black hole

If a star is located in the upper right corner of the HR diagram, what can you infer about its properties?

• It is hot and dim

• It is cool and bright

• It is hot and bright

• It is cool and dim