W1d1

$100: This branch of science studies matter, its properties, and how it changes during reactions. Answer: What is chemistry?
$200: Chemistry is sometimes called the “central science” because it bridges these two sciences. Answer: What are physics and biology?
$300: This term refers to the smallest unit of a chemical element that retains its properties. Answer: What is an atom?
$400: Chemistry impacts our daily lives in this way, from cooking to cleaning to powering cars. Answer: What is by driving chemical reactions?
$500: This term describes the study of the interactions and structure of tiny particles too small to see with the naked eye. Answer: What is molecular chemistry?

$100: This branch studies carbon-containing compounds and is often associated with living organisms. Answer: What is organic chemistry?
$200: The study of metals, minerals, and other non-carbon-based substances belongs to this branch. Answer: What is inorganic chemistry?
$300: This branch focuses on the analysis of substances to determine what they're made of. Answer: What is analytical chemistry?
$400: The study of chemical processes in living organisms, like digestion, belongs to this branch. Answer: What is biochemistry?
$500: This branch explores how energy and matter interact in chemical systems. Answer: What is physical chemistry?

$100: When you bake bread, this chemical compound helps it rise by producing carbon dioxide gas. Answer: What is baking soda (or sodium bicarbonate)?
$200: The rusting of metal is an example of this type of chemical reaction involving oxygen and moisture. Answer: What is oxidation?
$300: This common household substance, known for its acidic properties, is often used in cleaning and pickling. Answer: What is vinegar?
$400: The chemical process of combining hydrogen and oxygen to create water releases this form of energy. Answer: What is heat (or thermal energy)?
$500: These portable energy sources, found in devices like phones, rely on chemical reactions to produce electricity. Answer: What are batteries?

$100: The first step in the scientific method involves making this type of statement or observation. Answer: What is a question (or hypothesis)?
$200: The scientific method relies on this process to test a hypothesis. Answer: What is experimentation?
$300: This variable is the one that scientists deliberately change during an experiment. Answer: What is the independent variable?
$400: The scientific method requires these measurable outcomes to evaluate a hypothesis. Answer: What are data (or results)?
$500: In an experiment, this type of group is used as a baseline and does not receive the experimental treatment. Answer: What is the control group?

$100: This ingredient, often paired with baking soda, releases carbon dioxide gas to make baked goods fluffy. Answer: What is cream of tartar?
$200: The process of pickling involves soaking food in this acidic liquid to preserve it. Answer: What is vinegar?
$300: This chemical reaction causes browning in foods like toasted bread or grilled steak. Answer: What is the Maillard reaction?
$400: The process of turning milk into cheese relies on this enzyme to curdle the milk. Answer: What is rennet?
$500: Sugar dissolving in water is an example of this type of physical interaction rather than a chemical reaction. Answer: What is solubility?

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