| A | B |
|---|
| An apparent shift in the wavelength of light emitted by a light source moving toward or away from an observer is known as | Doppler shift |
| The apparent change in the position of an object resulting from a change in the angle or in the position from which it is viewed is called | Parallax |
| he earliest in the development of a star | Nebula |
| Large-scale groups of stars bound together by gravitational attraction are known as | Galaxies |
| Stellar distances are usually expressed in what units? | Light Years |
| What is the shape of a planet’s orbit? | Elliptical |
| Gamma rays, X-rays, visible light, and radio waves are all types of | Electromagnetic Radiation |
| The outermost layer of the sun is called the | Corona |
| Sunspots appear dark because they are relatively | Cool |
| The source of the sun’s energy is | Fusion |
| The surface of the sun is called the | Photosphere |
| The most dense layer of the sun is the | Core |
| The terrestrial planets are composed mostly of | Rock |
| What is the name of the 7th planet? | Uranus |
| The big bang theory is a widely accepted theory explaining the formation of the | Universe |
| The atmosphere of Venus is mostly what gas? | Carbon Dioxide |
| A natural satellite of a planet is called a what? | Moon |
| Because it has no atmosphere, the Earth's moon has many what? | Craters |
| The changing shapes of the moon when viewed from earth. | Phases |
| A full moon on Earth causes what in our ocean? | High Tide |
