P Sci Test 4 Review

Front

What type of chemical reaction can be represented AB --> A + B?

Back

Decomposition reaction: A reaction where a single compound breaks down into two or more simpler products.

Front

What is a substance composed of only one type of atom?

Back

Element: A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a molecule consisting of two atoms of nitrogen and four atoms of oxygen?

Back

Dinitrogen tetroxide: A chemical compound with the formula N2O4.

Front

What are chemical reactions in which one element in a compound is replaced by another element?

Back

Single-displacement reaction: A reaction where an element displaces another in a compound.

Front

What is a random change in the DNA code, which occurs when a segment of DNA is copied incorrectly?

Back

Mutation: A change in the nucleotide sequence of an organism's DNA.

Front

What type of reaction involves two or more substances combining to form a single product?

Back

Combination reaction: A reaction where two or more reactants combine to form one product.

Front

What is a substance made of two or more different types of atoms bonded together?

Back

Compound: A chemical substance formed from two or more elements in a fixed ratio.

Front

What type of reaction involves the exchange of ions between two compounds?

Back

Double-displacement reaction: A reaction where two compounds exchange ions to form two new compounds.

Front

What is the process by which cells convert genetic information into proteins?

Back

Gene expression: The process of transcribing DNA into RNA and then translating that RNA into proteins.

Front

What is the term for the energy required to start a chemical reaction?

Back

Activation energy: The minimum energy needed for a chemical reaction to occur.