The document is a 20 question vocabulary quiz covering various scientific terms related to biology, chemistry, and the scientific method. The quiz tests knowledge of terms like inorganic molecules, independent and dependent variables, dietary fiber, placebos, polarity, density, amino acids, lipids, proteins, carbohydrates, enzymes, and more. Students are to select the correct definition for each multiple choice question from the vocabulary terms provided.

1. Name_______________________________ Period_________
Vocabulary 3 Quiz
1_____a molecule that (usually) does not contain the element, carbon
A. water B. inorganic C. polar D. organic
2_____the variable that is measured in the experiment; the data.
A. control B. independent variable C. dependant variable D. constant
3_____ sometimes called roughage; the indigestible portion of plant foods (cellulose).
A. dietary fiber B. protein C. starch D. carbohydrate
4_____the group that does not receive the treatment: used as a comparison.
A. control B. independent variable C. dependant variable D. constant
5_____an organic molecule made of amino acids; gives living things their structure.
A. carbohydrate B. lipid C. protein D. nucleic acid
6_____a liquid (solid or gas) that dissolves a solid, liquid, or gas.
A. control B. solvent C. polarity D. density
7_____The variable being tested in an experiment; the variable the experimenter manipulates
A control B. independent variable C. dependant variable D. constant
8_____mass divided by volume.
A. control B. solvent C. polarity D. density
9_____an organic molecule made of carbon, hydrogen, and oxygen; a source of energy.
A carbohydrate B. lipid C. protein D. nucleic acid
10_____a type of protein that speeds up chemical reactions (a catalyst)
A. starch B. phospholipid C. fats D. enzyme
11. _____a molecule containing carbon that is created by or a part of living things.
A. water B. inorganic C. polar D. organic

2. 12_____A pill containing no active ingredient, given to the control group.
A placebo B. meniscus C. bias D. polarity
13_____a property of water describing how water has a positive and negative side.
A placebo B. meniscus C. bias D. polarity
14 _____the building blocks of proteins.
A. amino acids B. fatty acids C. monosaccharides D. water
15_____the curved surface on the top of water, created as the water sticks to the side of a container.
A placebo B. meniscus C. bias D. polarity
16_____factors in the experiment that remain the same.
A constant B. control C. ratio D. placebo
17_____an organic molecule that makes up cell membranes; also used for long-term energy storage
A. carbohydrate B. lipid C. protein D. nucleic acid
18_____A highly personal (and unreasoned distortion) of judgment.
A placebo B. meniscus C. bias D. polarity
19_____a type of carbohydrate that makes up the cell wall of plant cells; a source of dietary fiber for
people.
A. cellulose B. protein C. starch D. carbohydrate
20_____ simplest form of carbohydrate (sugar); quick energy source; example: glucose
A. polysaccharide B. disaccharide C. monosaccharide D. amino acid