Raelyid
Answered

Activity 6 (Science grade 10, Unit 1 Module 2)
Q28. How far do the plates move away from each other every year?
Q29. If Africa is approximately 2,400 km away from the Mid-Atlantic Ridge, how long ago was it when Africa was directly at or near the Mid-Atlantic Ridge?

Sagot :

Mizuid
[tex]Rate= \frac{d}{t} \\ = \frac{50 x 100,000/1}{4,000,000} \\ = \frac{5,000,000}{4,000,000} \\ = 1.25 x 2 \\ = 2.5 cm/yr \\ \\ t= \frac{d}{rate} \\ = 2400 x \frac{100,000}{1 km} \\ = \frac{2400,000,000}{2.5} \\ = 96,000,000 years[/tex]