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Science Flashcards #3
N/A
15
Science
7th Grade
12/19/2011

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Cards

Term
Cell
Definition
The basic unit of structure and function in a living thing.
Term
Microscope
Definition
An instrument that makes small objects look larger.
Term
Carbohydrate
Definition
A energy-rich organic compound, such as a sugar or a starch, that is made of the elements carbon, hydrogen, and oxygen.
Term
Element
Definition
Any substance that cannot be broken down into simpler substances.
Term
Compound
Definition
Two or more elements that are chemically combined.
Term
Protein
Definition
A large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.
Term
Lipid
Definition
An energy-rich organic compound, such as fat, oil, or wax, that is made up of carbon, hydrogen, and oxygen.
Term
DNA
Definition
The genetic material that carries information about an organism and is passed from parent to offspring.
Term
RNA
Definition
A nucleic acid that plays an important role in the production of proteins.
Term
Amino Acid
Definition
A small molecule that is linked chemically to other amino acids to form proteins.
Term
Enzyme
Definition
A type of protein that speeds up a chemical reaction in a living thing.
Term
Nucleus
Definition
A cell structure that contains nucleic acids, the chemical instructions that direct all the cell's activities.
Term
Cell Wall
Definition
A  rigid layer of nonliving material that surrounds the cells of plants and some other organisms.
Term
Organelle
Definition
A tiny cell structure that carries out a specific function within the cell.
Term
Chloroplast
Definition
A structure in a plant cell and some other organisms that captures energy from the sun and uses it to produce food.
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