6th Science CBA 1st Review

Which property does NOT normally describe metals?

• brittle

• good conductors of electricity

• malleable and ductile

Which group of elememts is brittle, shiny, and described as semiconductors?

• metals

• non metals

• metalloids

Which of the following elements would likely conduct electricity and heat well?

• copper

• nitrogen

• helium

Which group of elements is typically a gas at room temperature and a poor conductor of electricity?

• metals

• non metals

• metalloids

You need to find a material to make an electrical wire. What do you choose and why?

• A non metal because it is a good insulator.

• A metal because it is ductile.

• A metal because it is shiny.

Label the periodic table.

a

b

c

d

Nonmetals

Rare Earth Elements

Metalloids

Metals

Which of the following statements accurately describes how elements are organized on the periodic table? Select TWO correct answers.

• They are organized into three major categories: metals, nonmetals, and metalloids.

• Metalloids form a diagonal or staircase between metals and nonmetals.

• Metals are located on the right side of the periodic table.

• All nonmetals are grouped together on one side.

Which of the following is a characteristic of a pure substance?

• It can be physically separated into its components.

• It consists of multiple elements.

• It has a fixed composition and distinct properties.

Which of the following best describes a homogeneous mixture?

• a mixture in which the components are uniformly distributed

• a pure substance that can be separated into simpler substances by chemical means

• a mixture in which the components are not uniformly distributed

A student examines a glass of freshly squeezed orange juice and observes that it contains pulp, juice, and seeds. Based on the characteristics observed, what type of substance is the glass of freshly squeezed orange juice?

• pure substance

• homogeneous mixture

• heterogeneous mixture