Question

1. the mid - atlantic ridge spreads 25 kilometers in one million years while the east pacific rise spreads more than 15 centimeters per year. which has a faster unit rate of ocean floor spreading? explain your reasoning using words and numbers.

Explanation:

Step1: Convert units to be consistent

Convert 25 kilometers to centimeters: $25 \text{ km} = 25 \times 100000 = 2500000 \text{ cm}$

Step2: Calculate Mid-Atlantic Ridge rate

Divide total spread by time: $\frac{2500000 \text{ cm}}{1000000 \text{ years}} = 2.5 \text{ cm/year}$

Step3: Compare the two rates

Compare $2.5 \text{ cm/year}$ and $15 \text{ cm/year}$

Answer:

The East Pacific Rise has a faster unit rate. The Mid-Atlantic Ridge spreads at a rate of $2.5$ centimeters per year, which is slower than the East Pacific Rise's rate of more than 15 centimeters per year.