Chemistry Review

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products) with different properties.

Front

How can you tell if a chemical reaction has occurred?

Back

We can identify through evidence (or observations) that a new substance has formed.

Front

What is an exothermic reaction?

Back

A chemical reaction that releases energy in the form of heat or light.

Front

What is an endothermic reaction?

Back

A chemical reaction that absorbs energy, resulting in a decrease in temperature.

Front

What are the signs of a chemical reaction?

Back

Color change, temperature change, gas production (bubbles), and formation of a precipitate.

Front

What is the iterative (or engineering) process?

Back

A method where we start with a problem and test out different prototypes until we reach a desired goal.

Front

What does Claim, Evidence, and Reasoning (CER) mean in science?

Back

A framework for scientific argumentation where a claim is made, evidence is provided to support it, and reasoning connects the evidence to the claim.

Front

What are molecules?

Back

Groups of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the molecular formula for methane?

Back

CH₄, which consists of 1 carbon atom and 4 hydrogen atoms.

Front

What is a reactant?

Back

A substance that undergoes a chemical change in a reaction.