4.   Which statement best describes an igneous intrusion?  

Cartography is the science of 

A. map making.
B. the solar system.
C. the prime meridian.
D. cartoon graphics.

A?

I am not sure about the first question.

The second question is correct.

Both of your answers are correct.

6.   Earth is divided into 24 

A. equators.
B. coordinates.
C. time zones.
D. degrees.

B?

No.

C for 6

   What gives the gem amethyst its purplish color? 

A. Quartz
B. Titanium
C. Oxygen
D. Iron

D?

6. C is right.

The last answer is wrong.

http://www.google.com/#q=amethyst+mineral+

Oh A.Quartz

8.   A heterogeneous mixture is a 

A. mixture in which its components retain their identity.
B. component added to sand that makes it inseparable.
C. mixture that always contains water.
D. mixture in which its components can't be separated. 

A?

      

9.   As magma cools and crystalizes, minerals form in predictable patterns in a process known as 

A. partial melting.
B. intrusion.
C. fractional crystallization.
D. Bowen's reaction series.

D?

Yes. All are correct.

what measurement best describes the results of a scientific experiment regarding volume

2. Which statement best describes an igneous intrusion?

A. Magma explodes to the surface and forms a smooth outer layer of rock.
B. Magma is injected into surrounding rock forming an igneous intrusion.
C. Magma is exported to an open area and forms iron.
D. Igneous intrusions form when ice crystals splash into lava.