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Mrs. Taylor's Mid Term Exam
Mid Term Exam
121
Science
7th Grade
12/05/2010

Additional Science Flashcards

 


 

Cards

Term
data
Definition
facts, figures, other evidence observed
Term
inference
Definition
interpretation based on observing and knowledge
Term
science
Definition
way of learning about natural world
Term
observations
Definition
skills involving 1 or more senses
Term
variables
Definition
factors that can change in an experiment
Term
controlled experiment
Definition
experiment where all variables except one remain the same
Term
manipulated variable
Definition
variable that is changed DURING an experiment
Term
responding variable
Definition
variable that changes BECAUSE of an experiment
Term
6 characteristics of life
Definition
  1. energy
  2. cells
  3. water

 

 

Term
4 needs of all living things
Definition
  1. food
  2. water
  3. living space
Term
3 parts of cell theory
Definition

1. all things are made of cells

2. cells come from other cells

3. cells are basic unit

 

Term
organism
Definition
a living thing
Term
cell
Definition
basic unit of structure and function in organism
Term
unicellular
Definition
a organism made of only one cell (bacteria)
Term
multicellular
Definition
organism with more than one cell
Term
autotroph
Definition
organism that makes its own energy (plant)
Term
heterotroph
Definition
an organism that eats other organisms to get energy
Term
homeostasis
Definition
maintaining equal or stable internal conditions
Term
magnification
Definition
ability to make things look larger
Term
resolution
Definition
sharpness of an image
Term
organelle
Definition
basic unit of structure and function in a cell
Term
cell wall
Definition
outer covering of plant cell that gives it shape and structure
Term
cell membrane
Definition
outer covering of animal cells and also found in plant cells
Term
nucleus
Definition
directs all activities in cell
Term
chromatin
Definition
contain genetic material for cell and found in nucleus
Term
cytoplasm
Definition
gel-like fluid in cell
Term
mitochondria
Definition
rod-shaped organelles called powerhouses of cell
Term
chloroplast
Definition
organelle found in plants that capture energy
Term
prokaryote
Definition
organism that has no organelles or nucleus (bacteria)
Term
T/F? All living things either make energy or must eat an organism that makes its own energy.
Definition
True
Term
T/F?
The invention of the electron microscope made the discovery of cells possible.
Definition
False
Term
T/F?
The idea of spontaneous generation was proven by Redi and Pasteur.
Definition
False
Term
T/F?
Skin cells on humans are eukaryotic cells.
Definition
True
Term
T/F?
You cannot prove that a robot is nonliving.
Definition
False
Term
T/F?
The storage compartment of a cell is a vacuole.
Definition
True
Term
T/F?
Ribosomes are found in the cyptoplasm and on the endoplasmic reticulum.
Definition
True
Term
T/F?
The chromatin contains DNA.
Definition
True
Term
T/F?
A compound microscope contains more than one lens.
Definition
True
Term
T/F?
The energy that cells need comes from the sun.
Definition
True
Term
4 organic compounds
Definition
1. lipids 2. nucleic acids 3. proteins 4. carbohydrates
Term
DNA
Definition
type of nucleic acid that passes from parent to offspring and directs cell's function
Term
element
Definition
any substance that cannot be broken down into simpler substances
Term
atom
Definition
Term
enzyme
Definition
type of protein that speeds up chemical reactions
Term
organic compounds
Definition
most compounds that contain carbon
Term
compound
Definition
the chemical combination of 2 or more elements
Term
inorganic compounds
Definition
compounds that do NOT contain carbon
Term
molecule
Definition
the smallest unit of most compounds
Term
formula for photosynthesis
Definition
carbon dioxide + water--> oxygen + glucose 6C20 + 6 H2O--> 6C12O + 6H12O
Term
the raw materials of photosynthesis
Definition
carbon dioxide and water
Term
the products of photosynthesis
Definition
oxygen and glucose
Term
photosynthesis
Definition
the process where a cell captures energy and makes food
Term
chloroplasts
Definition
the site where photosynthesis actually occurs
Term
stomata
Definition
small openings on the underside of leaves through which carbon dioxide enters a plant
Term
chlorophyll
Definition
the main pigment found in plants
Term
pigments
Definition
colored chemical compounds that absorb light
Term
the difference between osmosis and diffusion
Definition
osmosis requires water diffusion moves across a membrane
Term
the difference between active transport and passive transport
Definition
active transport= needs energy passive transport= doesn't need energy
Term
selectively permeable
Definition
allows only some things to go in and out of a cell
Term
3 types of asexual reproduction
Definition
1. budding 2. regeneration 3. fission
Term
# of chromosomes after mitosis in a new cell
Definition
the same number of chromosomes as the original cell
Term
where lactic acid fermentation occurs
Definition
in the human body
Term
matching base for "C" DNA strand
Definition
G
Term
matching base for "T" DNA strand
Definition
A
Term
matching base for "A" DNA strand
Definition
T
Term
matching base for "G" DNA strand
Definition
C
Term
raw materials for respiration
Definition
glucose and oxygen
Term
products of respiration
Definition
water, energy, and carbon dioxide
Term
interphase
Definition
the first stage of cell cycle (where cell is most of life)
Term
mitosis
Definition
stage where cell's nucleus divides
Term
chromatid
Definition
each identical rod of a chromosome
Term
chromosome
Definition
double rod of condensed chromatin
Term
respiration
Definition
process occurring in cells to produce energy
Term
genetics
Definition
the scientific study of heredity
Term
alleles
Definition
the different forms of a gene
Term
traits
Definition
physical characteristics of organism
Term
recessive allele
Definition
an allele whose trait is masked in the presence of a dominant allele
Term
genes
Definition
factors that controll traits
Term
hybrid
Definition
an organism with two different alleles for a trait
Term
heredity
Definition
the passing of traits from parents to offspring
Term
dominant allele
Definition
an allele whose trait always shows up in an organism
Term
homozygous
Definition
two of the same alleles
Term
genotype
Definition
combination of alleles in DNA
Term
phenotype
Definition
the trait that shows up based on genotype
Term
Punnett square
Definition
a chart that shows all possible combinations of a cross
Term
sperm
Definition
male sex cell
Term
meiosis
Definition
process where the number of chromosomes is reduced by 1/2
Term
egg
Definition
female sex cell
Term
# of chromosomes in a human SEX cell
Definition
23
Term
# of chromosomes in a human cell
Definition
46
Term
red tides
Definition
an algal bloom that occurs in salt water
Term
autotroph
Definition
an organism that makes their own food
Term
algal bloom
Definition
the rapid growth of a population of algae
Term
decomposers
Definition
soil bacteria that break down large chemicals in dead organisms
Term
bacteriophage
Definition
a virus that infects bacteria
Term
heterotroph
Definition
an organism that eats other organisms
Term
vaccine
Definition
substance that stimulates the body to produce chemicals to destroy viruses or bacteria
Term
prokaryotic
Definition
organisms with NO nucleus
Term
eukayotic
Definition
organism with a nucleus
Term
eutrophication
Definition
build up of nutrients that leads to increase in the growth of algae in freshwater
Term
steps in which a virus invades a cell
Definition

1. virus attaches to surface of cell

2. virus injects genetic material into cell

3. new viruses made in cell using genetic code

4. virus bursts open, releasing new viruses (cell is now dead)

Term
6 kingdoms
Definition

1. archeobacteria

2. eubacteria

3. protists

4. fungi

5. plants

6. animals

Term

heterotroph/autotroph/both?

archeobacteria

Definition
both
Term

heterotroph/autotroph/both?

eubacteria

Definition
both
Term

heterotroph/autotroph/both?

protists

Definition
both
Term

heterotroph/autotroph/both?

fungi

Definition
heterotrophs
Term

heterotroph/autotroph/both?

plants

Definition
autotrophs
Term

heterotroph/autotroph/both?

animals

Definition
heterotrophs
Term
[image]
Definition

amoeba

 

uses pseudopods to move

Term
eukaryote
Definition
cell that contains membrane bound organelles and a nucleus
Term
[image]
Definition

euglena

 

uses flagellum to move

Term
[image]
Definition
bacilli
Term
[image]
Definition
coccus
Term
[image]
Definition

A. genetic material

B. cytoplasm

C. ribosomes

D. cell wall

E. cell membrane

F. flagellum

Term
[image]
Definition
anaphase
Term
[image]
Definition
metaphase
Term
[image]
Definition
prophase
Term
[image]
Definition
telophase
Term
[image]
Definition
equilibrium
Term
[image]
Definition

1. chloroplast

2. vacuole

3. cell wall

4. Golgi body

5. endoplasmic reticulum

6. cell membrane

7. chromatin

8. cytoplasm

9. ribosomes

10. nuclear membrane

11. nucleus

12. smooth endoplasmic reticulum

Term
[image]
Definition

1. Golgi bodies

2. endoplasmic reticulum

3. cell membrane

4. chromatin

5. cytoplasm

6. ribosomes

7. nuclear membrane

8. nucleus

9. smooth endoplasmic reticulum

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