Question

name:
quiz lessons 1 and 2 space
fill in the blanks use each word one time
-orbit -heliocentric -geocentric -diameter
-axis -revolution -spectrometer -illuminate

1. ______ is a straight line segment that passes from one edge of a circle or sphere, through its center, and to its opposite edge.
2. a description of the universe that placed earth at the center and the sun, moon, stars, and all the planets revolve around earth is known as ______.
3. a ______ is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum.
4. ______ is a modern view of the universe that places the sun at the center and the planets and their moons revolve around the sun.
5. an ______ is an imaginary line that runs through the middle of an object (for example, from pole to pole) around which that object rotates; a line at the side or bottom of a graph.
6. ______ is the curved path of one object, such as a planet or moon, around a central object, such as a star or planet; (verb) to move in a circular or elliptical path around a central object.
7. ______ is the movement of one object around a central object.
8. ______ is to light up.

Explanation:

1. Matches the definition of a straight line through a sphere's center between two edges.
2. Matches the model with Earth at the universe's center.
3. Matches the instrument for measuring light spectrum properties.
4. Matches the model with the Sun at the solar system's center.
5. Matches the imaginary line an object rotates around.
6. Matches the curved path of an object around a central body.
7. Matches the movement of an object around a central body.
8. Matches the definition of to light up.

Answer:

1. Diameter
2. Geocentric
3. Spectrometer
4. Heliocentric
5. Axis
6. Orbit
7. Revolution
8. Illuminate