1. The whole world is with rocks. 2. Rocks have / have never been melted or molten at some time.
3. Bubbles / Lines in some rock were formed by chemical reactions in the rock when cool.
4. Wind and moving over the surface break rock down into sand.
5. Soil comes from which comes from rocks.
6. Igneous rocks come from the word meaning fire.
7. Sedimentary rock has layers because sand / boulders are washed downstream and settle on the bottom.
8. rock is a combination of the other two and has changed into new rock.
9. Rock can change into sand and sand can then change into over many years.
10. in farmland has a lot of living things in the top layer or horizon.
11. A huge flood happened in Washington State when a(n) broke.
12. Only water / several things can change the shape of the land.
13. Diamonds are the substance known to us.
14. Rocks are formed by wind, heat, and water and change from one type into another.
15. Sedimentary rocks are made from sand and compressed under heat and pressure.

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

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