Exploration 1
This it the current model of the solar system.
What is heliocentric?
The (inner planets / the outer planets) have less mass.
What are the inner planets?
These provide information about the composition of the universe.
What are meteorites (or piece of an asteroid)?
Evaporating readily at normal temperatures and pressures.
What is volatile?
The model of the universe with the earth at the center.
What is geocentric.
The (inner planets/outer planets) are more dense.
What are the inner planets?
This may occur when an asteroid strikes the Earth.
What is a crater or impact crater?
A stream of high-speed, ionized particles ejected primarily from the sun’s corona.
What is solar wind?
This tool enabled astronomers to make much more precise measurements of the locations of stars at different times of the year.
What is the telescope?
These objects in the solar system are made of gas, ice, and metal.
What are the gas giants (or outer planets)?
This provides evidence for the AGE of the Earth and for other parts of the solar system.
What is radioactive decay?
A disk of gas and dust particles that orbit a newly formed star, from which planets may form.
What is proplanetary disk?
An optical illusion when Earth passses a slower planet.
What is retrograde?
Dwarf planets are composed of these two materials.
What are rock and ice?
The number of half-lives that have passed when one-fourth of the parent atom remains.
What are two?
A large cloud of gas and dust in interstellar space; a region in space where stars are forming.
What is nebula?
Name the five planets that can be seen without a telescope.
What are Mercury, Venus, Saturn, Mars, and Jupiter?
This forms when a comet enters a region of the solar system where the temperature is high enough to vaporize ices.
What is a tail (or tail of a comet)?
The number of half-lives that passed when 87.5% of daughter atoms have formed?
What are three?
Lightweight elements and molecules were transported to the outer parts of the solar systm through this.
What is solar wind?