Multiple Choice
Identify the letter of the choice that best completes the
statement or answers the question.
|
|
|
1.
|
Heat and melting was caused by
_____
a. | some other source of energy.
| c. | energy from stars. | b. | energy from other planets. | d. | decaying
radioactive isotopes. |
|
|
|
2.
|
When did the Nebula start to form?
a. | We don't know | c. | 4-6 billion years ago | b. | 2-3 billion years ago | d. | 1 million years
ago |
|
|
|
3.
|
What is the solar Nebula?
a. | A cloud of interstellar
gas/dust | c. | A type of
gravity | b. | Protostar | d. | A
supernova |
|
|
|
4.
|
One theory states that the Earth _____
a. | developed a crust because less dense matter rose to the
surface. | b. | originally formed
from gases thrown off by the Sun. | c. | was
remelted. | d. | has always been
layered. |
|
|
|
5.
|
What was the shape of the Nebula?
a. | Plane | c. | Disk | b. | Can't be
determined | d. | Sphere |
|