Space Systems Regents Patterns

Comprehensive practice questions covering the Big Bang, stellar evolution, Kepler's Laws, and Earth-Moon-Sun relationships as presented in the Space Systems Regents review transcript.

According to the transcript, how long ago did the Big Bang occur?

The universe originated $13.7$ billion years ago ($13.8$ b.y.a. in marginal notes) from a hot and dense state.

What are the two primary pieces of evidence for the Big Bang mentioned in the text?

$1$. Redshift of galaxies (showing the universe is expanding) and $2$. Cosmic microwave background radiation (remnants of early energy).

What does Hubble's Law state regarding distant galaxies?

Distant galaxies move away faster.

What was the elemental composition of the early universe?

The early universe contained mostly hydrogen ($75\%$) and helium ($25\%$).

How are elements heavier than iron created and distributed through the universe?

They are created and scattered during supernova explosions.

What specific factor determines a star's size, brightness, and lifespan?

Initial mass.

What is the lifespan of the Sun and where is it in its life cycle?

The Sun has a $10$-billion-year lifespan and is currently about halfway through it.

What is Kepler's First Law of planetary motion?

Planets move in elliptical orbits with the Sun at one focus.

According to Kepler's Second Law, how does a planet's speed change based on its distance from the Sun?

Planets move faster when closer to the Sun and slower when farther away.

What two phenomena are caused by Earth's rotation on its axis?

$1$. Day and night cycles and $2$. The apparent motion of the Sun, Moon, and stars across the sky.

What are the two primary causes of Earth's seasons?

Earth's tilt and its revolution (orbiting the Sun).

How do the summer and winter solstices differ in terms of daylight and sunlight in the Northern Hemisphere?

June has the longest daylight and most direct sunlight; December has the shortest daylight and least direct sunlight.

How long does a full moon phase cycle take?

About $29.5$ days.

What is the celestial alignment for a solar eclipse versus a lunar eclipse?

Solar eclipse: Sun-Moon-Earth ($\text{SME}$). Lunar eclipse: Sun-Earth-Moon ($\text{SEM}$).

Why is only one side of the Moon ever visible from Earth?

Because the Moon's rotation and revolution take the same period of time.

What causes the apparent retrograde motion of planets observed from Earth?

Differences in orbital speeds and perspective from Earth.

What long-term changes contribute to ice ages and gradual climate changes on Earth?

Changes in the shape of Earth's orbit and shifts in axial tilt over thousands of years.

In stellar evolution, what is the stage where stable nuclear fusion occurs?

Main sequence.

What stage occurs in the life of a star before nuclear fusion begins?

A protostar forms before the start of nuclear fusion.

What elements can be formed by nuclear fusion within stars?

Heavier elements up to iron.

Electromagnetic spectrum

The range of all electromagnetic radiation, with varying wavelengths and energy levels.

Radio waves

Long wavelengths and low energy.

Infrared radiation

Wavelengths shorter than radio waves, high energy, and significant for identifying dark objects, holding past.

Visible light

The portion of the electromagnetic spectrum that is visible to the human eye.

Ultraviolet radiation

High energy radiation with shorter wavelengths than visible light.