6.5C Formation of a New Substance

If we have any substance, it can be concluded that a chemical change has happened if –

• there is a color change.

• the state of matter changes.

• there is a decrease in mass.

• the matter is stirred thoroughly.

Tags

NGSS.MS-PS1-2

Which of the following situations provides evidence that a chemical change has taken place?

• Water, when boiled, evaporates and turns into vapor.

• Sugar, when added to iced tea, dissolves into the liquid.

• Two liquids are mixed, and a solid substance forms.

• A piece of paper is cut into many small pieces.

Tags

NGSS.MS-PS1-2

Which of the following would indicate the formation of a new substance?

• A liquid turns to a solid.

• A sample of metal melts.

• Bubbles and fizzing occur.

• A solid dissolves in a liquid.

Tags

NGSS.MS-PS1-2

Substances were mixed with a clear liquid. Based on the observations on the chart, for which mixture is there the best evidence that a new substance was formed?

• Substance 1

• Substance 2

• Substance 3

• Substance 4

Tags

NGSS.MS-PS1-2

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

Match the following

• An example of a chemical change

• 1. Gas

• Elements bond and form a new substance

• 1. Chemical Change

• 3. Can be released during a chemical change

• Physical Change

• Cutting Paper

• 1. Fireworks

Tags

NGSS.MS-PS1-5

The image shows what happens when cold medicine tablets are placed in room-temperature water. What evidence would indicate that a new substance is produced?

• The water changes color
• The tablet dissolves
• Bubbles are formed
• The water temperature increases

Tags

NGSS.MS-PS1-2

The table records the observations that result from four different combinations. Which combination of substances shows evidence that a new substance was formed?

• Combination of oil and water

• Combination of salt and water
• Combination of baking soda and vinegar

• Combination of iron filings and sand

Tags

NGSS.MS-PS1-2

A ____________ change is a sign of a chemical change​​.  One example of this is when a half-eaten apple turns brown.

Organize these options into the right categories

Groups:

(a) Chemical Change

,

(b) Physical Change

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Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-3