8th Grade Science Review Units 1 - 3

Front

What are the basic building blocks for all matter?

Back

Atoms are the basic building blocks for all matter.

Front

How many Oxygen atoms are present in 2H₂O?

Back

There are 2 Oxygen atoms present in 2H₂O.

Front

List the layers of rock in order from youngest to oldest.

Back

The correct order is E, D, A, B, C.

Front

Which layer of Earth is located above the outer core?

Back

The layer located above the outer core is the mantle.

Front

What is the top layer of the Earth's surface called?

Back

The top layer of the Earth's surface is called the Crust.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

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.

Front

What is the Earth's crust?

Back

The Earth's crust is the outermost layer of the Earth, consisting of solid rock and soil.

Front

What is the mantle?

Back

The mantle is the layer of the Earth located between the crust and the outer core, composed of semi-solid rock.

Front

What is the outer core?

Back

The outer core is a liquid layer composed mainly of iron and nickel, located beneath the mantle.