Midterm Exam 2024-2025 (8th grade)

Front

How many Chlorine's (Cl) are in MgCl2?

Back

There are 2 Chlorine atoms in MgCl2.

Tags

NGSS.MS-PS1-1

Front

What does it mean that the universe is expanding?

Back

It means that most galaxies are spreading out or moving apart.

Front

What is each horizontal row on the periodic table called?

Back

Each horizontal row is called a Period.

Front

What has been happening to the universe since it began?

Back

The universe has been expanding.

Tags

NGSS.HS-ESS1-2

Front

Which elements are found on the right side of The Periodic Table?

Back

Nonmetals are found on the right side of the Periodic Table.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What are the three main types of elements on the periodic table?

Back

Metals, Nonmetals, and Metalloids.

Front

What is a chemical bond?

Back

A chemical bond is a lasting attraction between atoms that enables the formation of chemical compounds.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Tags

NGSS.MS-PS1-1

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number and properties, helping to predict their behavior.

Tags

NGSS.HS-PS1-1