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7th Grade Science

Overview of SC 7th Grade Science Standards
by

Heather Boudreaux

on 24 June 2010

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Transcript of 7th Grade Science

7th Grade
Science Cells Body Systems Genetics Ecology Matter Periodic Table Atoms Acids and Bases pH scale Indicators Acids Bases sour
corrosive with metals
pH below 7
Ex: lemons, sodas, stomach acid bitter
good cleaners
pH above 7
Ex: bleach, ammonia, soap pH paper litmus paper phenolphathalein red for acids blue for bases Physical changes include changes in shape, size, or state.



Crumbling paper, melting ice and carving a statue show physical changes. pH scale is 1-14 7 is neutral Metals Nonmetals Metalloids Atomic Number Atomic Mass Protons Electrons Neutrons smallest particle of matter Chemical changes include changes in color, smell, or temperature.

An apple turning brown, a rotten egg, and a chemical heating pad show chemical changes. Animal
Cells Plant
Cells Bacteria Protists cell membrane
nucleus
cytoplasm
vacuole
mitochondria cell membrane
nucleus
cytoplasm
vacuole
mitochondria
cell wall
chloroplasts rectangular in shape due to the cell wall chloroplasts make sugar for the plant rounded shape Spirilla - spiral shaped Cocci - sphere shaped Bacilli - rod shaped Physical and Chemical Changes Amoeba Euglena Paramecium uses a pseudopod
(false foot)
to move and feed uses a flagella
(whip-like tail)
to move and feed uses cilia
(tiny hairs)
to move and feed Punnett Squares Inherited vs. Aquired Cell Processes Photosynthesis Respiration Mitosis plant cells produce
sugar in chloroplasts all cells break down food for
energy in mitochondria produces an exact
copy of a cell Genes Dominant -
will always show;
written with capital letter Recessive -
will be covered by a dominant;
written with lower case letter Genes are found on chromosomes
in the nucleus of cells
Inherited traits are passed
on from parents
through genetics Aquired traits are learned
or absorbed from the
environment in some way Examples:
eye color
height
curly hair Examples:
throwing a ball
accents
handwriting style Used to predict
genetic outcomes Parents' genotypes listed
on top and side Possible children are
discovered in inner squares Skeletal muscular circulatory nervous respiratory excretory digestive skin supports body
protects organs
makes new blood cells joints allow motion
muscles are attached to bone voluntary - can control
involuntary - do not control protects from disease and injury
produces Vitamin D
cools body by sweating epidermis
dermis
fatty layer
Digestive Tract:
mouth
esophagus
stomach
small intestine
large intestine
rectum
anus
Accesssory Organs:
salivary glands
pancreas
liver
gall bladder
pumps blood through the body
delivers oxygen and nutrients
carries waste away from cells
heart - 4 chambers
arteries - carry blood away from heart
veins - carry blood to the heart
capillaries - tiny blood vessles where matterials are exchanged takes in oxygen
releases carbon dioxide and water
nose
trachea
bronchi
alveoli
lungs
diapragm
controls all body functions
nerve cells send messages to and from the brain
cerebrum - controls thinking, sensing and memories
cerebellum - balance and coordination
brain stem - involuntary functions
spinal cord - nerves connecting brain to body
helps body get rid of waste
many other organ systems help get rid of wastes, too kidneys - filter waste from blood
ureter - carry urine to bladder
bladder - stores urine
urethra - releases urine skeletal muscles attach to bones
smooth muscles make internal organs
cardiac muscle is in the heart Levels of Organization Energy Soil Water limiting factors organism
population
community
ecosystem
biome
biosphere food webs
food chains
energy pyramids immigration
emigration
birth rate
death rate
natural disasters
food supply
space drainage basin
surface runoff
zone of aeration
zone of saturation
water table
aquifers
Layers of Soil:
topsoil
subsoil
parent material
bedrock
Sizes of Soil:
sand
silt
clay
Characteristics of Soil:
pH
permeability
particle size
humus
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