The viscosity of magma depends upon its silica content and its a. pahoehoe. b. temperature. c. magnetism. d. pyroclastic flow.

Option B, Temperature

Explanation:

Viscosity of magma is inversely proportional to its temperature. Thus, the higher the temperature, the lower is the viscosity and thus more rapidly the magma flows. Magma with lower temperature have high viscosity and thus they flow slowly.

high Viscosity = low temperature

low Viscosity = high temperature

Based on temperature lava produced from magma are of two types –  

a)Pahoehoe  - low viscosity lava  

b)Aa  - high viscosity lava.

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.