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Chapter 21 Study Guide - The Solar System

The Solar System
When you look at an image of the sun, you are actually looking at the ________________.
Solar wind
The _________is a stream of electrically charged particles that extend outward from the sun's corona.
In a ______________, earth revolves around the sun.
inner planets
All of the _____________ are small and have rocky surfaces.
__________ predicted the existence and orbit of Neqtune based on Neptune's gravitational effect on the orbit of Uranus.
The orbits of most ________ are in the shape of long narrow ellipses.
asteroid belt
The __________ is located between Mars and Jupiter.
___________ usually come from comets or asteroids.
When a meteoroid enter Earth's atmosphere, it produces a streak of light called a __________.
Venus and Earth
________________ are much alike in terms of their size and density.
Saturn's rings
____________ are made up mostly of chunks of ice and rock.
___________ is different from most other planets because it rotates on its side.
____________ is the largest and most massive planet.
Ancient Astronomers
Most _________________ thought that all celestial objects revolved around Earth.
Nuclear fusion
______________ occurs in the core or center of the sun.
_________ was formerly consedered to be a planet but is now classified as a dwarf planet.
A comet's head consists of a nucleus and a fuzzy outer layer called the ______________.
A meteoroid that hits Earth's surface is called a ____________.
The sun's corona, which looks like a ________ can usually be seen only during a solar eclipse.
hydrogen and helium
The gas giants are composed mainly of ______________.
flowing water
Regions on the surface of mars have patterns that appear to have been made by _____________.
geocentric model
An Earth centered model of the universe is called a ____________.
carbon dioxide
Mar's atmosphere is mostly _______________.
great red spot
Jupiter's _____________ is a storm larger than Earth.
The middle layer of the sun's atmosphere is the ___________.