Download Science Chapter 1 Unit A

Chapter One
Unit A
Cells
Lesson 1
What are the
parts of a cell?
Vocabulary Words
CellCytoplasmNucleusOrganelle-
Standards
 Students
know that many multicellular organisms have specialized
structures to support the transport
of materials.
The Cell
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All living things have
one or more cells
Cells are the basic unit
of an organism
Cells come from other
cells
One cell organisms:
bacteria, algae
Multi-cellular organisms:
worm, whale, humans,
dogs
Parts of a Cell
pg. 10-11
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Nucleus- “brain of the 
cell”, control center
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Cell membranesurrounds cell and
allows food & water to
enter
Cell wall (only in plant

cells)- protects cell
Cytoplasm- thick “jello”
like fluid in cell
Ribosomes- allows 
cell to perform
functions
Vacuoles- sacs that store
water, food, & waste
Golgi apparatus- helps
cell from breaking
Chloroplast (only in plant
cells)- absorbs sunlight &
uses energy to make food
Mitochondria- “power
plant” of cell, gives cell
energy
Endoplasmic reticulumprovides passageway for
cell materials
Brain Cell
Bone and Blood Cells
Muscle and Stomach Cells
Nerve & Fat Cells
Gland and Hair Cells
Kidney & Intestine Cells
Lesson 2
How do cells
make and use
energy?
Vocabulary Words
 Cellular
respiration Diffusion Osmosis-
Standards
 Students
know plant and animal
cells break down sugar to
obtain energy, a process
resulting in carbon dioxide and
water
Cell Energy
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All organisms need
energy
The most important
source of energy is
glucose
Glucose= form of
sugar
Animals & humans
must eat glucose
– Ex: bread, potatoes,
rice
Glucose
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Plants make their
own glucose
Plants, animals, &
humans break
down glucose in a
process called
cellular respiration
Glucose + Oxygen
= energy
Why do cells need energy?
Making protein: proteins are needed for
your nails, skin, and hair
 Movement: muscle cells need energy to
move your body
 Cell division: new cells form when old
cells divide in two, and cells need energy
for this process
 Transportation: cells transport water,
glucose, oxygen, waste, and minerals in
the body
– Ex: Diffusion & osmosis are two forms
of transportation
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Cell Division
Organisms & Energy
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Not all organisms
need the same
amount of energy
Who needs more
energy?
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Warm-blooded
Large body
Greater speed
Ex. cheetah
Lesson 3
How are cells
organized?
Vocabulary Words
 Organ Organ
system Tissue-
Standards
 Students
know many multicellular organisms have
specialized structures to
support the transport of
materials
Cell to Organism
An organism is made up of
organ systems
– Ex. muscular system,
digestive system, skeletal
system, respiratory
system
 Organ systems are made of
organs
– Ex. Brain, heart, stomach,
lungs, kidneys
 Organs are made of tissue
– Ex. Muscle tissue, brain
tissue, bone tissue, nerve
tissue
 Tissue is made of cells!
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Organism
Organ system
Organ
Tissue
Cells
Organs
Muscle & Brain
Tissue