Galaxies and the Universe

Which of the following radiations that consists of electric and magnetic disturbances traveling through space as waves?

• Alpha particles radiation

• Electromagnetic radiation

• Ultraviolet radiation

• Thermal radiation

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Study the figure and choose the set of electromagnetic radiations that arranged in decreasing wavelength?

• Infrared, Radio waves, Microwaves

• Visual light, X-rays, Microwaves

• Microwaves, Ultraviolet, X-rays

• Gamma rays, X-rays, Visual light

Tags

NGSS.HS-PS4-1

There are two different types of telescopes that used to focus visible light. What is the type of telescope that invented around 1608 and used lenses to bring visible light to a focus?

• refracting telescope

• refracting telescope

What is the type of telescope that invented in 1668 that bring visible light to a focus with mirrors?

• refracting telescope

• reflecting telescope

Astronomers often send instruments into space to collect information because Earth's atmosphere interferes with most radiation. Which of the following is one the space-based observatories?

• Hubble Space Telescope

• Radio telescope

• Refracting telescope

• Reflecting telescope

Hubble went on to study galaxies and categorize them according to their _______________.

• Shapes

• Size

• Color

• Stars

What system was used to categorized the galaxies?

• letter-number system

• size-shape system

• distance-speed system

• arms and nucleus system

Disklike galaxies are classified as spiral galaxies and it is subdivided into normal spirals and barred spirals. How does barred spirals differed from normal spirals?

A. Barred spirals has elongated spiral regions.

B. Barred spirals has bar from which the spiral arms extend.

C. Barred spirals do not have bars.

• A and C

• B and C

• A and B

• A, B, and C

Normal spirals (S) and barred spirals (SB) are further subdivided by how tightly the spiral arms are wound and how large and bright the nucleus. The letter c represents loosely wound arms and a small dim nucleus. Which from the following is a Normal spiral c or (Sc)?

• 
• 
• 
• 

The picture shows SBa galaxy. Which of the following statements best describes this galaxy?

• Flat disks that do not spiral arms.

• Less round and more elongated.

• With bars and loosely wounds arms a bright nucleus.

• With bars and has tightly wound arms and a large, bright nucleus.