7th Grade School-Wide Assessment #1 2024-2025

Which of these is an element? (7.PS1.1)

• KBr

• O₂

• 2KCl₂

• FeO₂

In order to determine if two atoms are copper (Cu) atoms, what must be the same for each? (7.PS1.1)

• the number of valence electrons

• the number of protons

• the charge of the atom

• the size of the atom

A model of an oxygen atom is shown. (7.PS1.1)

What is the charge of the atom?

• 0

• 2

• 6

• 8

Tags

NGSS.MS-PS1-1

Calcium carbonate (CaCO₃) is considered a compound because it is made up of two or more (7.PS1.2)

• molecules

• elements

• gases

• solids

Which is an example of a mixture? (7.PS1.3)

• oxygen

• ice

• soil

• silver

Using the partial periodic table, which statement is correct?

• Oxygen (O) has more protons than chlorine (Cl).

• Iron (Fe) has more protons than silver (Ag).

• Sodium (Na) has more protons than carbon (C).

• Hydrogen (H) has more protons than helium (He).

Tags

NGSS.MS-PS1-1

When two nitrogen atoms combine, they form a (7.PS1.2)

• mixture.

• compound.

• molecule.

• liquid.

Tags

NGSS.MS-PS1-1

What is formed when a sodium atom and chlorine atom react chemically? (7.PS1.2)

• an element

• a compound

• an electron

• a neutron

Tags

NGSS.MS-PS1-2

Salt and pepper are placed together in a container. When the container is shaken, the salt and pepper become a (7.PS1.3)

• liquid.

• mixture.

• solution.

• suspension.

A student sees the diagram shown in a textbook. What does the symbol in the diagram represent?

• a compound

• an element

• a molecule

• an isotope

Tags

NGSS.MS-PS1-1