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8th Grade Science

Across
the effect whereby the position or direction of an object appears to differ when viewed from different positions, e.g. through the viewfinder and the lens of a camera.
the force that attracts a body toward the center of the earth, or toward any other physical body having mass.
How bright an object appears in the sky from Earth
a galaxy exhibiting a central nucleus or barred structure from which extend curved arms of higher luminosity.
the range of wavelengths or frequencies over which electromagnetic radiation extends.
a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.
solar nebula, gaseous cloud from which, in the so-called nebular hypothesis of the origin of the solar system, the Sun and planets formed by condensation.
a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.
a small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light.
Graph in which the absolute magnitudes (intrinsic brightness) of stars are plotted against their spectral types (temperatures).
a small very dense star that is typically the size of a planet. A white dwarf is formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula.
a celestial object, thought to be a rapidly rotating neutron star, that emits regular pulses of radio waves and other electromagnetic radiation at rates of up to one thousand pulses per second.
Down
a coherent, typically large body of matter with no definite shape.
a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.
a very large star of high luminosity and low surface temperature. Red giants are thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion.
a massive and extremely remote celestial object, emitting exceptionally large amounts of energy, and typically having a starlike image in a telescope. It has been suggested that quasars contain massive black holes and may represent a stage in the evolution of some galaxies.
a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
the brightness of a celestial object as it would be seen at a standard distance of 10 parsecs.
a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure. Modern astronomers divide the sky into eighty-eight constellations with defined boundaries.
The very central region of the star – the core – collapses, crushing together every proton and electron
a contracting mass of gas which represents an early stage in the formation of a star, before nucleosynthesis has begun.
a system of two stars in which one star revolves around the other or both revolve around a common center.
a region of space having a gravitational field so intense that no matter or radiation can escape.
the process or result of joining two or more things together to form a single entity.