C165 - Unit 4 Earth and Sky -
Lessons 1-6: Quiz- Questions with
Answers 100% PASS
ON YOUR JOURNEY, YOU ENCOUNTER A CLOUD OF GAS
PARTICLES. AS THE FORCE OF GRAVITY PULLS THESE PARTICLES
CLOSER TOGETHER, WHICH OF THE FOLLOWING PROPERTIES OF
THE GAS ALSO INCREASES?
TEMPERATURE
DENSITY
PRESSURE
ALL OF THESE INCREASE - CORRECT ANSWER-ALL OF THESE
INCREASE
EXPLANATION:
THE TEMPERATURE, DENSITY, AND PRESSURE ALL INCREASE.
,YOUR SPACECRAFT ENTERS A LARGE SPIRAL GALAXY THAT HAS AT
ITS CENTER A BLACK HOLE THAT CAN BE DETECTED DUE TO ITS
EMISSION OF:
MATTER.
SOUND.
ELECTROMAGNETIC RADIATION. - CORRECT ANSWER-
ELECTROMAGNETIC RADIATION.
EXPLANATION:
MATTER FALLING INTO A BLACK HOLE IS ACCELERATED SO
RAPIDLY THAT IT EMITS ELECTROMAGNETIC RADIATION,
INCLUDING LIGHT AND X-RAYS.
AS YOU TRAVEL THROUGH THE SPIRAL GALAXY, YOU PASS BY A
STAR WITH SEVERAL PLANETS ORBITING IT. SUPPOSE THE FORCE
OF GRAVITY BETWEEN THE PLANETS AND THEIR STAR WAS
SUDDENLY TURNED OFF. WHICH OF THE FOLLOWING BEST
DESCRIBES THE MOTION OF THE PLANETS IN THE ABSENCE OF
ANY GRAVITATIONAL FORCE?
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law
, THEY WOULD SPIRAL AWAY FROM THEIR STAR.
THEY WOULD STOP MOVING.
THEY WOULD MOVE IN A STRAIGHT LINE.
THEY WOULD SPIRAL INWARD TOWARD THEIR STAR. - CORRECT
ANSWER-THEY WOULD MOVE IN A STRAIGHT LINE.
EXPLANATION:
WITHOUT GRAVITY PULLING THEM TOWARD THE STAR, THE
INERTIA OF THE PLANETS WOULD KEEP THEM MOVING IN A
STRAIGHT LINE AT A CONSTANT SPEED.
YOU RETURN TO YOUR SOLAR SYSTEM AND FLY FROM THE OUTER
EDGE OF THE SYSTEM TOWARD THE SUN. WHICH PLANET'S
ORBITAL PATH WILL YOU CROSS FIRST?
JUPITER
MARS
NEPTUNE
EARTH - CORRECT ANSWER-NEPTUNE
Lessons 1-6: Quiz- Questions with
Answers 100% PASS
ON YOUR JOURNEY, YOU ENCOUNTER A CLOUD OF GAS
PARTICLES. AS THE FORCE OF GRAVITY PULLS THESE PARTICLES
CLOSER TOGETHER, WHICH OF THE FOLLOWING PROPERTIES OF
THE GAS ALSO INCREASES?
TEMPERATURE
DENSITY
PRESSURE
ALL OF THESE INCREASE - CORRECT ANSWER-ALL OF THESE
INCREASE
EXPLANATION:
THE TEMPERATURE, DENSITY, AND PRESSURE ALL INCREASE.
,YOUR SPACECRAFT ENTERS A LARGE SPIRAL GALAXY THAT HAS AT
ITS CENTER A BLACK HOLE THAT CAN BE DETECTED DUE TO ITS
EMISSION OF:
MATTER.
SOUND.
ELECTROMAGNETIC RADIATION. - CORRECT ANSWER-
ELECTROMAGNETIC RADIATION.
EXPLANATION:
MATTER FALLING INTO A BLACK HOLE IS ACCELERATED SO
RAPIDLY THAT IT EMITS ELECTROMAGNETIC RADIATION,
INCLUDING LIGHT AND X-RAYS.
AS YOU TRAVEL THROUGH THE SPIRAL GALAXY, YOU PASS BY A
STAR WITH SEVERAL PLANETS ORBITING IT. SUPPOSE THE FORCE
OF GRAVITY BETWEEN THE PLANETS AND THEIR STAR WAS
SUDDENLY TURNED OFF. WHICH OF THE FOLLOWING BEST
DESCRIBES THE MOTION OF THE PLANETS IN THE ABSENCE OF
ANY GRAVITATIONAL FORCE?
© 2026 Copyright. All Rights Reserved. This document is
protected by copyright law
, THEY WOULD SPIRAL AWAY FROM THEIR STAR.
THEY WOULD STOP MOVING.
THEY WOULD MOVE IN A STRAIGHT LINE.
THEY WOULD SPIRAL INWARD TOWARD THEIR STAR. - CORRECT
ANSWER-THEY WOULD MOVE IN A STRAIGHT LINE.
EXPLANATION:
WITHOUT GRAVITY PULLING THEM TOWARD THE STAR, THE
INERTIA OF THE PLANETS WOULD KEEP THEM MOVING IN A
STRAIGHT LINE AT A CONSTANT SPEED.
YOU RETURN TO YOUR SOLAR SYSTEM AND FLY FROM THE OUTER
EDGE OF THE SYSTEM TOWARD THE SUN. WHICH PLANET'S
ORBITAL PATH WILL YOU CROSS FIRST?
JUPITER
MARS
NEPTUNE
EARTH - CORRECT ANSWER-NEPTUNE
