What your life would have been without sand and light. (minimum of 100 words)

Without light, we can't see. So life would have been harder-much harder.

Explanation:

Our eyes take in light to see- in the darkness they take in as much light as possible, and when it's bright, they take in as little as possible. They do this by changing the size of the pupil.

If there is no light, people cannot see. So how would we know where we are going?

Here's how: we would evolve over time to use our other senses ( smell, taste, touch and hearing) better, like animals with bad eyesight.

Our senses of smell and hearing would play the most important role.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..