The Moon Electromagnetic Radiation The Sun Some More More Planets Misc

100

rayed craters
The youngest features on the lunar surface are _________.

100

red
Which of the following colors has the longest wavelength?

100

sunspots
The most conspicuous features on the surface of the Sun are dark areas called ________.

100

Venus
What is the second planet from the Sun?

100

two weeks
The length of daylight on the Moon is about _______.

200

craters
Depressions on the moon’s surface caused by the impact of meterorites and other debris are known as ________.

200

waves or particles
In different situations, light behaves like ________.

200

The fusion of hydrogen atoms to produce helium
Much of the Sun’s energy is produced by:

200

Mercury
Which one of the terrestrial planets has a surface landscape similar to that of the older areas of the Moon?

200

Meteroids
________ are small, extraterrestrial particles that glow brightly and burn up as they travel through the Earth’s atmosphere.

300

huge impact basins that were nearly filled with basaltic lava flows
How did the lunar maria most likely originate?

300

gravity
Which of the following is NOT considered a form of electromagnetic radiation? a. radio waves b. gravity c. gamma rays d. visible light e. x-rays

300

solar flares
The most explosive events to occur on the Sun are ________.

300

seven
According to the Ptolemaic (Greek) model of the universe, how many “heavenly” bodies could be observed wandering along the background of stars?

300

Heliocentric model
In what solar system model was the sun proposed as the center of the solar system?

400

Phobos
________ is a moon of Mars.

400

an X-ray telescope
Which of the following types of telescopes must be above Earth’s atmosphere to function?

400

granules
The Sun’s surface has a grainy texture produced by numerous bright markings called ______.

400

False
All the planets (excluding Pluto) orbit the Sun in the same direction and in nearly the same plane of orbit.

400

The Doppler principle
To determine whether a celestial body is approaching or receding from Earth, astronomers employ __________.

500

sidereal
The period of time required for the Moon to complete a revolution is called the ______ month.

500

Radio waves
In the electromagnetic spectrum, what type of radiation has the longest wavelengths?

500

spectacular aurora displays on Earth
Major solar flares cause ________.

500

distance
Hubble’s law states that galaxies are receding from us at a speed that is proportional to their ________.

500

the Big Bang
The discovery that the universe appears to be expanding led to a widely accepted theory called _________.

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