| A | B |
|---|
| An example of a (blank) in a rocket is hydrazine as the fuel and nitrogen tetroxide as the oxidizer. | propellant |
| The distance from the sn to Earth is 1 (blank) or about 150 million kilometers. | astronomical unit |
| Visible light, infrared, and ultraviolet radiation are part of the (blank). | electromagnetic spectrum |
| Propellants are measured by (blank) a ratio related to the exhause speed of gases coming out of a rocket. | specific impulse. |
| Many rockets are build in (blank) that can be discarded when fuel is used up | stages |
| What evidence do astronomers look for to indicate the formation of a new star? | the glowing cloud of gas of a nebula |
| The color red in Landsat satellite wavelength bands (blank). | picks out different types of vegetation. |
| Of the two types of satellites above the Earth, which is higher: polar or geostationairy? | geostationary. |
| Landsat does NOT give data for (blank). | tracking hurricanes |
| Why is a space telescope such as Hubble such a tremendous advantage over Earth-based telescopes? | Hubble is above the filtering effects of the UV, IT, and visible light by Earth's atmosphere, Hubble is gree of the effects of the shifting gasese of Earth's atmosphere, and astronomers using Hubble can observe planets more clearly in the UV and IR bands. |
| What is the unit of measure for specific impulse? | seconds |
| What scientific unit is appropriate to measure the distance between two cities in a state? | kilometer |
| What scientific unit is appropriate to measure distances within the solar system? | astronomical unit |
| What unit is appropriate to measure the distances between stars and the Milky Way galaxy? | light-year |
| Why are units such as astronomical unit and light-year needed in astronomy? | The great distances between planets and solar system and stars in our galaxy are best handled by a unit of measure larger than kilometers. |
| Why is interstellar space travel not very probable in our lifetime? | Distances to the stars are so vast that the time and energy needed to travel to them is impossible with our present technology. |
