1. effect how all things grow and change every year.
2. The earth is always / sometimes tilted as it goes around the sun.
3. If it is
on one side of the world, it is winter on the
other.
4. The southern hemisphere is another name for the southern
of the earth.
5. The reason it is cold in the winter is because we get
sunlight / moonlight at an angle.
6. A pendulum can be used to show the
of the earth.
7. In summer in Alaska, there are only a few hours of
each day.
8. A year is exactly
and % days long.
9. The tilt of the Moon / Earth causes the sun to appear in the sky at
a slightly different spot every day.
10. The
are the longest days of the year.
11. The equinox / solstice is the time when the days are the same
length around the world.
12.
has seasons because its axis is tilted much like
the earth.
13. As the
change, so do plants.
14. In Chilie, Christmas is during the

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

they deliver oxygen to the blood

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.