Chemical Reactions

Will the properties of the two samples likely be the same or different?

• Different because the repeating groups of atoms that make up each sample are different.

• Different because there are more repeating groups of atoms in Sample 1.

• The same because the repeating groups of atoms that make up the two samples have the same number of atoms.

• The same because the repeating groups of atoms that make up the two samples have two of the same types of atoms.

Tags

NGSS.MS-PS1-1

Where did Dr. Yung (the chemist near Westfield) find the reddish-brown substance when she examined all the possible sources?

• coming from the pipes into the houses

• in the wells where the water comes from

• in the ponds nearby the town

• in all water everywhere in Westfield

Tags

NGSS.MS-PS1-2

When examining the following evidence, which is the best evidence we should use?

• ugly color, solid

• white, small pieces

• white, small, grainy, crystals

Tags

NGSS.MS-PS1-2

A group of atoms joined together in a particular way...

• molecule

• atom

• extended structure

• property

Tags

NGSS.MS-PS1-1

A group of atoms joined together in a particular, specific way is a...

Tags

NGSS.MS-PS1-1

Review the results from Dr. Yung's lab. Based on this evidence, which claim about the reddish brown substance is best supported?

• Claim 1: The reddish-brown substance is the same as the substance that makes up the pipes.

• Claim 2: The reddish-brown substance is the same substance as the fertilizer.

• Claim 3: The reddish-brown substance is not the same as either the fertilizer or the substance that makes up the pipes.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Which word means a group of atoms joined together in a particular way?

• model

• property

• scale

• molecule

Tags

NGSS.MS-PS1-1

Who had a better description of the sample?

• David

• Luisa

letters and numbers showing the types and number of atoms that repeat to make up a substance (like H2O)

• chemical equation

• chemical formula

• chemical latitude

Tags

NGSS.MS-PS1-1

What is the law of conservation of mass in chemical reactions?

• Mass is created during a chemical reaction.

• Mass is destroyed during a chemical reaction.

• Mass is conserved and remains constant during a chemical reaction.

• Mass is converted into energy during a chemical reaction.

Tags

NGSS.MS-PS1-5