Physics 9 final review

Which of the following EM radiation has the highest frequency and energy?

• X-rays

• Infrared

• Visible light

• Microwaves

How do stars form?

• Stars form directly from black holes as they are created from supernovae.

• Stars formed as gravity split off from the combined force just after the Big Bang.

• Stars formed as soon as hydrogen atoms began being mass-produced about 380,000 years after the Big Bang.

• Stars form as the dust and gas of the Universe are drawn in and condensed by gravity to smaller and smaller areas.

Astronomers use the term _____________________ to describe how bright a star appears from Earth.

• apparent magnitude

• radiometry

• luminance

• Doppler Shift

When the core of a middle-sized star shrinks and the outer layers of the star are expelled into space, which of the following are formed? CHOOSE ALL THAT APPLY!

• a planetary nebula

• a black hole

• a neutron star

• a white dwarf star

Nearly all of Earth's energy needs are met by:

• wind power.

• the Sun.

• oil and water.

• gamma rays.

Which of the following is the "engine" for stars?

• gravity

• chemical combustion

• thermonuclear fusion

• electromagnetism

Which of these stars has the highest surface temperature?

• 
• 
• 
• 

The first galaxies formed:

• about 1 billion years ABB.

• about 200 million years ABB.

• about 380000 years ABB.

• about 4.6 billion years ago.

Galaxies may be partially held together by:

• thermonuclear fusion.

• dark matter.

• dark energy.

• the Doppler Effect.

What are the three types of plate boundaries?

• Transform, Convergent, Divergent
• Apart, Together, Slide
• Slide, Pull away, Push together