Front

What is everything in the world made of?

Back

Atoms are the basic building blocks of matter.

Front

What is an example of an extended structure?

Back

An extended structure is a large arrangement of atoms or molecules, such as a crystal.

Front

What is rust?

Back

Rust is a brown substance formed when iron reacts with oxygen and moisture.

Front

How many molecules are in a given image?

Back

Count the distinct groups of atoms to determine the total number of molecules.

Front

Do different substances have different properties?

Back

Yes, substances have different properties based on their atomic structure and arrangement.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is made up of two or more atoms.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where substances (reactants) transform into new substances (products).

Front

What are the signs of a chemical reaction?

Back

Signs include color change, gas production, temperature change, and formation of a precipitate.

Front

What is the role of energy in chemical reactions?

Back

Energy is required to break bonds in reactants and is released when new bonds form in products.