Vocabulary Flashcards
1
Q
What is angular velocity?
A
- Determining the time rate of change of a rotating body in an angular postion.
2
Q
What is an orbit?
A
- The path of rotationor revolving around a nucleas of an atom.
3
Q
- What is a period?
A
- The during when something begins or ends.
4
Q
- What does it mean to Revolve?
A
- To move in an orbit.
5
Q
- What does Rotation Mean?
A
- A turning on it’s axis.
6
Q
- When is a Sidereal day ?
A
- An event four minutes shorter than solar day,the period between two passages of the vernal equinox over the medirian.
7
Q
- When is Solar day?
A
- The 24 hour period of time between one midnight and another.
8
Q
- What is a Year?
A
- An interval of 365 to 366 days.
9
Q
- What can a Nebula be?
A
- A cloud of interstellar gas and dust
10
Q
- What is a Parsec?
A
- A unit used to measure large distances, unlike AU and light year.
11
Q
- What can a Constellation be?
A
- A grouping of stars into a recognizable pattern.
12
Q
- What is a Light Year ?
A
- The distance light travels in one year.
13
Q
- What is the definition of Astronomical unit ?
A
- The Length of the distance between the earth and the sun?
14
Q
- What is the definition of Planetesimal?
A
- One of the small bodies that formed from the solar nebula and eventually grew into protoplanets.
15
Q
- What is the definition of a Nuclear fusion?
A
- A reaction when two nuclei to form a nucleus with releasing energy.
16
Q
- **What could Protoplanetary be ? **
A
- A Rotation of gas and dust surrounding the core of a developing solar system.
17
Q
- What is the meaning of Terrestrial planets?
A
- Planets with a compact rocky surface like the earth’s.
18
Q
- What is are gas giant planets?
A
- A planet almost made entirely on gas.
19
Q
- What are Comets?
A
- A object consisting of a nucleus of ice and dust,and when near the sun its a tail of gas and dust.** **
20
Q
- What are Asteroids?
A
- A small rocky object moving around the sun.
21
Q
- What are cosmologists?
A
- An astronomer who studys the space and time and the evoulution.
