18. Which of the following is a factor that determines the composition of magma?
A. Texture
B. Elasticity
C. Color
D. Viscosity
D or B?
Probably D.
20. A flat area on a mountain is known as a
A. plateau.
B. grand valley.
C. valley straight.
D. rising canyon.
A.plateau?
Right.
Thank-you,that was all I needed for today!Happy Valentines Day!
To determine which of the factors determines the composition of magma, we need to understand what each factor represents:
A. Texture: Texture refers to the size and arrangement of the mineral grains in the magma or rock. It does not directly determine the composition of magma.
B. Elasticity: Elasticity refers to the ability of a substance to deform under stress and then return to its original shape once the stress is released. Elasticity is not directly related to the composition of magma.
C. Color: The color of magma can provide some clues about its composition. However, it is not the primary factor that determines the composition of magma.
D. Viscosity: Viscosity is a measure of a fluid's resistance to flow. It is directly related to the composition of magma. Different compositions of magma, such as high silica content, lead to higher viscosity, while low silica content results in lower viscosity.
Therefore, the correct answer is D. Viscosity is a factor that determines the composition of magma.