Exploring Matter and Chemical Changes

Which of the following is an example of a compound?

• Gold (Au)

Tags

NGSS.MS-PS1-1

What subatomic particle has a negative charge?

• Proton

• Neutron

• Electron

• Nucleus

Which of the following is a physical change?

• Burning wood

• Melting ice

• Rusting iron

• Baking a cake

Tags

NGSS.MS-PS1-4

Which element is classified as a metal on the Periodic Table?

• Helium

• Sodium

• Chlorine

• Neon

Which of the following best describes a mixture?

• A substance made of only one type of atom

• A substance made of two or more elements chemically combined

• A substance made of two or more substances physically combined

• A substance with a fixed ratio of atoms

Drag and Drop: Match each term to its correct description. Terms: 1. Proton 2. Neutron 3. Electron Descriptions: A. Has no charge B. Has a positive charge C. Has a negative charge

• 1-B, 2-A, 3-C

• 1-A, 2-B, 3-C

• 1-C, 2-B, 3-A

• 1-B, 2-C, 3-A

Which of the following is an example of a chemical change?

• Dissolving sugar in water

• Boiling water

• Burning a candle

• Breaking glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement best explains why the Law of Conservation of Mass applies to a closed system during a chemical reaction?

• Atoms are destroyed in a closed system.

• Atoms are created in a closed system.

• Atoms are rearranged but not lost or gained in a closed system.

• Atoms can escape from a closed system.

Tags

NGSS.MS-PS1-5

A student mixes iron filings and sulfur powder. Which process would best separate the iron from the mixture?

• Adding water

• Using a magnet

• Heating the mixture

• Filtering the mixture

Which model best represents the structure of an atom?

• A solid sphere

• A nucleus with protons and neutrons, surrounded by electrons

• A cube with electrons at each corner

• A flat disk with protons only

Tags

NGSS.MS-PS1-1