Compounds, Elements and Chemical Reactions

Which row shown represents compounds?

• Top row

• Bottom row

Tags

NGSS.MS-PS1-1

What is the smallest building block of matter?

• Compounds

• mixtures

• atoms

• pizza

Tags

NGSS.MS-PS1-1

Which choice would be a molecule?

• O

• H

• Au

• H₂

Tags

NGSS.MS-PS1-1

Which of the following is an element?

• H₂O

• C₁₂H₂₂O₁₁

• NaCl

• H₂

Tags

NGSS.MS-PS1-1

Look at your periodic table, what are the chemical symbols for Gold and Copper?

• G & C

• Au & Cu

• Na & Cl

• Zn & Ga

Which of the following is a chemical change?

• A rusted can

• A crushed can

• A chopped piece of wood

• Water evaporating

Tags

NGSS.MS-PS1-2

Liquid becomes a solid at the ________ point.

• melting

• freezing

• boiling

• evaporating

Tags

NGSS.MS-PS1-4

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

Is melting butter for popcorn a chemical or physical change?

• chemical
• physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Is hammering wood together to build a house a chemical or physical change?

• chemical
• physical