6th Grade Science Final 2025

What is found in the center (nucleus) of an atom?

• Electrons

• Protons and neutrons

• Protons and electrons

Tags

NGSS.MS-PS1-1

What is the correct chemical symbol for calcium?

• A. Ca

• B. CA

• C. ca

The number of protons in an atom is called its...

• Atomic number

• Mass

• Group

The modern periodic table is organized by...

• Atomic number

• Element names

• Density

Matter made of one kind of atom is called a(n)...

• Compound

• Mixture

• Element

An element created by scientists in a lab is called...

• Artificial

• Synthetic

• Electric

How many oxygen atoms are in a molecule of CO₂?

• One

• Two

• Three

Tags

NGSS.MS-PS1-1

Water (H2O) is an example of a...

• Mixture

• Compound

• Metal

Tags

NGSS.MS-PS1-1

A chemical formula tells us...

• The atoms in a compound

• The temperature of an object

• The density of a substance

Tags

NGSS.MS-PS1-1

Which subatomic particle is the lightest?

• Neutron

• Proton

• Electron