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What is the region of the Solar system that consists of billions of fragments of ice and dust, and a major source of comets?
What is the region of the Solar system that consists of billions of fragments of ice and dust, and a major source of comets?
What is the term for the entirety of space and time, and all forms of matter and energy?
What is the term for the entirety of space and time, and all forms of matter and energy?
What is the term for a collection of hundreds of billions of stars held together by gravity?
What is the term for a collection of hundreds of billions of stars held together by gravity?
What is the distance from the Earth to the Sun defined as?
What is the distance from the Earth to the Sun defined as?
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What is the process by which the Sun produces energy?
What is the process by which the Sun produces energy?
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What is a large cloud of dust and gas called?
What is a large cloud of dust and gas called?
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What is the term for a small particle from space that enters the Earth's atmosphere?
What is the term for a small particle from space that enters the Earth's atmosphere?
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What is the term for a celestial body that is too small to be rounded by its own gravity?
What is the term for a celestial body that is too small to be rounded by its own gravity?
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What is the average distance between the Sun and Earth?
What is the average distance between the Sun and Earth?
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What is the process in which the nuclei of atoms fuse together and form larger atoms?
What is the process in which the nuclei of atoms fuse together and form larger atoms?
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What is the region of rocky debris that forms a ring around the Sun at a distance of about 3 AU?
What is the region of rocky debris that forms a ring around the Sun at a distance of about 3 AU?
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What is a celestial object made of ice and dust that orbits the Sun?
What is a celestial object made of ice and dust that orbits the Sun?
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What is a piece of metal or rock that crashed to the Earth's surface and created a crater?
What is a piece of metal or rock that crashed to the Earth's surface and created a crater?
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What is the distance that a beam of light can travel through space in one year?
What is the distance that a beam of light can travel through space in one year?
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What is a small celestial object in orbit around the Sun, especially in the asteroid belt?
What is a small celestial object in orbit around the Sun, especially in the asteroid belt?
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What is a meteoroid that enters Earth's atmosphere and begins to burn up as a result of friction?
What is a meteoroid that enters Earth's atmosphere and begins to burn up as a result of friction?
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What is the term for the cool, darker areas on the Sun's photosphere?
What is the term for the cool, darker areas on the Sun's photosphere?
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What is the term for a rocky object that forms an orbit between Mars and Jupiter?
What is the term for a rocky object that forms an orbit between Mars and Jupiter?
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What is the term for a natural object that orbits a planet?
What is the term for a natural object that orbits a planet?
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What is the term for a collection of dust, gases, and billions of stars?
What is the term for a collection of dust, gases, and billions of stars?
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What is the term for an icy object that orbits the Sun?
What is the term for an icy object that orbits the Sun?
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What is the term for a streak of light from an object falling through the Earth's atmosphere?
What is the term for a streak of light from an object falling through the Earth's atmosphere?
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What is the term for an object that strikes the Earth's surface after falling through the atmosphere?
What is the term for an object that strikes the Earth's surface after falling through the atmosphere?
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What is the region of space between Mars and Jupiter where many small rocky objects orbit the Sun?
What is the region of space between Mars and Jupiter where many small rocky objects orbit the Sun?
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Study Notes
Space Unit Exam Review
Key Terms and Definitions
- Celestial objects: objects we can see in the sky that are not man-made
- Astronomical unit: the average distance between the Sun and Earth
- Light year: the distance that a beam of light can travel through space in one year
- Nuclear fusion: the process in which the nuclei of atoms fuse together and form larger atoms, releasing an enormous amount of energy
- Solar system: the Sun together with all the planets and celestial objects held by the Sun's gravitational attraction and orbit around it
- Star: a hot ball of plasma, an electrically charged gas, that shines because nuclear fusion is taking place in its core
- Asteroid belt: a region of rocky debris that forms a ring all the way around the Sun at a distance of about 3 AU
- Comet: a celestial object made of ice and dust that orbits the Sun, and as it approaches the Sun, a gas tail and a dust tail will form
- Meteor: a meteoroid that enters Earth's atmosphere and begins to burn up as a result of friction
- Meteorite: a piece of metal or rock that crashed to the Earth's surface and created a crater
- Meteoroid: a piece of metal or rock in the solar system that is smaller than an asteroid, and has no fixed path
- Oort cloud: the most distant region of the Solar system that consists of billions of fragments of ice and dust, and a major source of comets
- Universe: everything that physically exists, including the entirety of space and time, and all forms of matter and energy
- Galaxy: a collection of hundreds of billions of stars held together by gravity
- Nebula: a large cloud of dust and gas
The Sun and Solar System
- The distance from the Earth to the Sun is defined as an astronomical unit (AU)
- The sun produces energy by a process called nuclear fusion
- Sunspot: a cooler, darker area on the Sun's surface
- Prominence: a large, bright, and hot cloud of gas on the Sun's surface
- Solar flare: a sudden and intense release of energy on the Sun's surface
- Coronal mass ejection: a massive release of energy and plasma from the Sun's corona
- Solar wind: a stream of charged particles emitted by the Sun
Comets, Asteroids, and Meteoroids
- Comets: formed from the Oort cloud, made of ice and dust, and orbit the Sun
- Asteroids: formed from the asteroid belt, made of rock and metal, and orbit the Sun
- Meteoroids: smaller than asteroids, made of metal or rock, and have no fixed path
Inner and Outer Planets
- Inner planets: composed of rock and metal, small in size, and close to the Sun
- Outer planets: composed of gas and ice, large in size, and far from the Sun
Planets and Dwarf Planets
- Planets: large enough to be rounded by their own gravity and have cleared their orbits
- Dwarf planets: not large enough to clear their orbits and have irregular shapes
Meteoroids, Meteors, and Meteorites
- Meteoroid: a piece of metal or rock in the solar system
- Meteor: a meteoroid that enters Earth's atmosphere and begins to burn up
- Meteorite: a piece of metal or rock that crashed to the Earth's surface and created a crater
Moon Phases
- New moon: the Moon is between the Earth and the Sun
- Full moon: the Moon is on the opposite side of the Earth from the Sun
Lunar and Solar Eclipses
- Lunar eclipse: the Earth blocks the Sun's light from reaching the Moon
- Solar eclipse: the Moon blocks the Sun's light from reaching the Earth
Tides
- Tides are generated by the gravitational pull of the Moon and Sun on the Earth's oceans
Space Research and Exploration
- Direct benefits: improved technology, medical advancements, and scientific understanding
- Spinoff benefits: indirect benefits, such as improved communication and navigation systems
- Costs: financial, human, and environmental costs
- Issues: funding, safety, and environmental concerns
Microgravity
- Microgravity: a state of weightlessness or low gravity
- Effects on the human body: muscle loss, bone loss, and vision problems
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Description
Review key terms related to the solar system, galaxy, and universe for the SNC1W1 space unit exam. Match definitions with terms such as asteroid, comet, meteor, and more.
