Exploring Materials and Their Structures

What is the basic unit of matter?

• atom

• electron

• molecule

• cell

What are the three states of matter?

• solid, liquid, gas

• plasma, vapor, foam

• solid, liquid, plasma

• gas, liquid, crystal

What is the process called when a solid turns into a liquid?

• Sublimation

• Melting

• Freezing

• Condensation

What is the term for a mixture that has a uniform composition?

• Homogeneous mixture

• Solution

• Heterogeneous mixture

• Compound

What is the smallest particle of an element?

• molecule

• compound

• ion

• atom

What happens to the molecules in a gas when it is heated?

• The molecules in a gas become solid when heated.

• The molecules in a gas move faster and collide more frequently when heated.

• The molecules in a gas lose energy and stop moving when heated.

• The molecules in a gas slow down and spread apart when heated.

What is the water cycle?

• The water cycle is the process of water being stored in lakes and rivers.

• The water cycle is the process of water moving through evaporation, condensation, and precipitation.

• The water cycle involves the transformation of water into solid ice only.

• The water cycle is the method of water being filtered through soil and rocks.

What is a compound?

• A compound is a type of chemical reaction.

• A compound is a single element.

• A compound is a mixture of gases.

• A compound is a substance made of two or more elements chemically combined.

What is the difference between an element and a compound?

• An element can be made of multiple types of atoms, while a compound is made of a single type of atom.

• An element consists of one type of atom, while a compound consists of two or more different types of atoms chemically bonded together.

• A compound is a pure substance, while an element is a mixture of different substances.

• Elements can be broken down into simpler substances, whereas compounds cannot.

What is the periodic table?

• A chart that lists all known animals.

• The periodic table is a chart that organizes all known chemical elements based on their properties.

• A table used for cooking recipes.

• A diagram showing the solar system.