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7th Grade Science Chapter 3 Vocabulary
Vocabulary Words
32
Science
7th Grade
11/13/2015

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Term

The movement of materials through a cell membrane using energy


1

Definition
active transport
Term

A small molecule that is linked chemically to other amino acids to form proteins

 

1

Definition
amino acid
Term

an organism that makes its own food

 

1

Definition
autotroph
Term

an energy-rich organic compound made of the elements carbon, hydrogen, and oxygen

1

Definition
carbohydrate
Term

the regulary sequence of growth and division that cells undergo

1

Definition
cell cycle
Term

a green pigment found in the chloroplasts of plants,m algae, and some bacteria

1

Definition
chlorophyll
Term

a doubled rod of condensed chromatin

1

Definition
chromosome
Term

Two or more elements that are chemically combined

2

Definition
compound
Term

The final stage of the cell cycle, in which the cell's cytoplasm divides, distributing the organelles into each of the two new cells

2

Definition
cytokinesis
Term

the process by which molecules move from an area of higher concentration to an area of lower concentration

2

Definition
diffusion
Term

the process by which molecules move from an area of higher concentration to an area of lower concentration

2

Definition
diffusion
Term

deoxyribonucleic acid, the genetic material that carries information about an organism and is passed from parent to offspring

2

Definition
DNA
Term

any substance that cannot be broken down into simpler substances

2

Definition
element
Term

any substance that cannot be broken down into simpler substances

2

Definition
element
Term

a protein that speeds up chemical reactions in a living thing

2

Definition
enzyme
Term

the process by which cells break down molecules to release energy without using oxygen

2

Definition
fermentation
Term

an organism that cannot make its own food

3

Definition
heterotroph
Term

the stage of the cell cycle that takes place before cell division occurs

3

Definition
amino acid
Term

the stage of the cell cycle that takes place before cell division occurs

3

Definition
interphase
Term

energy-rich organic compound, such as a fat, oil, or wax, that is made of carbon, gydrogen and oxygen

3

3

Definition
lipid
Term

the stage of the cell cycle during which the cell's nucleus divides into two new nuclei and one copy of the DNA is distributed into each daugther cell

3

Definition
mitosis
Term

very large organic mole cule made of carbon, oxygen, hydrogen, nitrogen, and phosphorus, that contains the instructions cells need to carry out all of the functions of life

3

Definition
nucleic acid
Term

the diffusion of water moleculedes through a selctively permeable membrane

3

Definition
osmosis
Term

the movement of materials through a cell membrane without using the cell's energy

3

Definition
passive transport
Term

the process in which some organisms use water along with sunlight and carbon dioxide to make their own food

3

Definition
photosynthesis
Term

a colored chemical that absorbs light

4

Definition
pigment
Term

large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur

4

Definition
protein
Term

the process by which a cell makes a copy of the DNA in its nucleus

4

Definition
replication
Term

the process by which cells break down simple food molecules to release the energy they contain

4

Definition
respiration
Term

ribonucleic acid; a nucleic acid that plays an important role in the production of proteins

4

Definition
RNA
Term

the property of cell membranes that allows some substances to pass through, while others cannot

4

Definition
selectively permeable
Term

small openings on a leaf through which oxygen and carbon dioxide can move

4

Definition
stomata
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