Answer:
D) Phosphorous catches fire in air.
The number of people per square mile is the population density
Answer:
Spatial concepts in geography
Explanation:
Spatial concepts provide a language for describing the arrangement of people, places, and environments. Arrangements can be characterized in terms of proximity, distance, scale, clustering, distribution, etc.
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Answer:
Core samples and Tree rings
Explanation:
Very early societies did not have a written language or ways to efficienly preserve information over time
Answer:
sun is bigger than earth is 13.9 cm
Explanation:
given data
radius of sun = 700,000 km
radius of earth = 6500 km
to find out
how big is the sun
solution
we know here
scale 1 to 10 billion is
scale = 
so here
we know that scaled diameter = actual diameter × scale .................1
so for earth
scaled diameter of earth = 2 × 6500 × 
scaled diameter of earth = 1.3 ×
and
scaled diameter of sun = 2 × 700,000 × 
scaled diameter of sun = 1.4 ×
so
sun is bigger than earth is 1.4 ×
- 1.3 ×
sun is bigger than earth is 0.000139 = 13.9 cm