# Science 7R - HW Qs. Check

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1. The biosphere includes all the air, land, and water where ____ exist

a) soil
b) coral
c) an abiotic facter
d) life

My Answer - a (or b....)

am i correct??????

• Science 7R - HW Qs. Check -

d) life

• Science 7R - HW Qs. Check -

Nope.

• Science 7R - HW Qs. Check -

well it can't be a or b
then i know it's not c

so im assuming the answer is d which make A LOT sense

thanks

• Science 7R - HW Qs. Check -

Yes. You and Elena are correct.

• Science 7R - HW Qs. Check -

It has the prefix bio, it is probably about biological stuff or in other words life.

• Science 7R - HW Qs. Check -

James,
Anyway
mass = density * volume
look up density of iron (about 8 grams /cm^3)

mass = about 8 * 247 * pi * 2.6^2/4
in grams. Divide by 1000 to get kg

• Science 7R - HW Qs. Check -

umm.... thanks.........

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