Formation of a New Substance

A student notices that sugar, when heated over a flame, turns black. How does the student know that a new substance is being formed?

• The temperature of the sugar increases.

• The color of the sugar changes to black.

• Sugar began to melt within the test tube.

• Sugar started as white crystals.

Tags

NGSS.MS-PS1-2

What evidence would indicate that a new substance is produced?

• The tablets dissolve in water.

• The water becomes cloudy.

• The water level increases slightly.

• Bubbles are given off.

Tags

NGSS.MS-PS1-2

Which of the following observations is the best indicator that a new stubstance has been formed?

• A solid has become a liquid.

• A substance has change color.

• A solid has dissolved in a liquid.

• The volume of a substance increased.

Tags

NGSS.MS-PS1-2

Production of a precipitate

• A pure substance that cannot be broken down into a simpler substance

• Any form of matter that is uniform throughout and has consistent properties

• Evidence of a new substance formed from a chemical change, resulting in solid particles that form or separate out of a liquid

• A change that alters the identity of a substance resulting in a new substance or substances with different properties

Tags

NGSS.MS-PS1-2

A change that alters the identity of a substance resulting in a new substance or substances with different properties

• Substance

• Properties

• Chemical change

• Color change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Temperature change

• Evidence of a new substance formed from chemical change

• Evidence of release of energy during a chemical change

• Characteristics that can only be observed or measured when atoms of matter rearrange during a chemical change

• Increase or decrease of heat energy in a substance may be evidence of a new substance formed during chemical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Evidence of a new substance formed from chemical change: includes bubbles, fizzing or odor change

• Properties

• Color Change

• Production of a gas

• Compound

Tags

NGSS.MS-PS1-2

A new substance forms when which of the following occurs?

• When the shape of an object changes

• When the size of an object changes

• When chemical properties are affected

• A physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following must occur when two or more substances form a new substance?

• Breakdown of an element

• Formation of an element

• A physical change

• A chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When two liquids combine and form a solid during a chemical change, this is known as which of the following?

• Temperature change

• Color change

• Production of a gas

• Precipitate formation

Tags

NGSS.MS-PS1-2