Sun and Stars
Earth's Sun has a surface temperature of
What is 5,500 K?
The fourth planet from the Sun
What is Mars?
This word means a pattern that repeats in a predictable way.
What is cyclic?
What is 23.5o?
The half-life of Carbon-14
What is 5,730 years?
Carbon takes this long to synthesize into oxygen in the core of a star.
This planet has an orbit with the greatest eccentricity.
What is Mercury?
Tides change from high to low and low to high every ______________ hours.
What is 6?
The Sun sets in this direction.
What is west?
Mr. Murphy found an volcanic rock in his backyard. He should use this radioisotope to date the rock.
What is Potassium-40?
This element has emission spectra at 685 nm, 667 nm, and 588 nm.
What is helium?
This celestial object has the greatest orbital speed, based on its distance from the Sun.
What is Mercury?
Spring tides occur during these two phases of the lunar month.
What is new moon and full moon?
This day has the most hours of sunlight in the Northern Hemisphere.
What is June 21 (summer solstice)?
Ms. Mejia found a human skull in her house with 25% of Carbon-14 remaining. The skill has undergone this many half-lives.
What is 2 half-lives?
In 3 billion years, Tau Ceti will become this kind of star.
What is a red giant?
The eccentricity of a planet whose major axis is 10 AU and whose foci are 2 AU apart.
What is e = 0.200?
An observer recorded the times of three successive high tides at one Earth location as 7:12 am, 7:38 pm, and 8:04 am. The next high tide is
What is 8:00-8:30 pm?
The Earth is at this point in its orbit during the summer.
What is aphelion?
A sample of mica has 30 grams of Neodymium-143 and 10 grams of Samarium-147. The sample is this old.
What is 212 billion years old?
According to Kepler's Laws, Earth's orbital velocity on July 5th is slowest due to this.
What is Earth's distance from the Sun is the greatest then?
Compared to the orbit of Jovian planets, the orbit of Halley's comet is more ____________________ and more ________________.
What is more elliptical, with a greater distance between its foci?
In order to have the least difference between high and low tides, the Moon, Earth, and Sun should form this kind of an angle.
What is 90o, or a right angle?
This latitude experiences direct sunlight on December 21st.
What is 23.5o south, or the Tropic of Capricorn?
A sample of glacier ice is found to have an age of 25,785 years. It has undergone this many half-lives.
What is 4.5?