solids liquids and gases

Which type of solid is hard, brittle, and nonconducting unless dissolved in H₂O?

• Ionic Crystal
• Covalent Molecular Crystal
• Metallic Crystal
• Covalent Network Crystal

Tags

NGSS.HS-PS1-3

Which type of solid typically has the lowest melting point of the four types of crystals?

• Ionic Crystal
• Covalent Molecular Crystal
• Metallic Crystal
• Covalent Network Crystal

Which type of solid has strong covalent bonds between neighboring atoms?

• Ionic Crystal
• Covalent Molecular Crystal
• Metallic Crystal
• Covalent Network Crystal

Tags

NGSS.HS-PS2-6

what is a gas?

• a substance or matter in a state in which it will expand freely to fill the whole of a container

• the basic unit of a chemical element

• an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-4

what is a liquid?

• a substance that flows freely but is of constant volume

• a substance or matter in a state in which it will expand freely

• firm and stable in shape

An amorphous solid has a definite melting point.

• True

• False

A state of matter with a definite volume, but no definite shape is a(n) _______.

• liquid

• solid

• gas

Tags

NGSS.MS-PS3-4

What is a crystal?

• A pure material that can’t be changed.

• Material with a regular,repeating arrangement of atoms.

• A foggy like material.

Tags

NGSS.MS-PS1-1

A chain of repeating units (called monomers)

• monomer

• dimer

• replicate

• polymer

Which of these is an example of synthetic (man-made) polymer?

• cotton fibers

• rubber

• wool

• polyvinyl chloride (PVC)