Physical and Chemical changes Test Review 2018

Marie had a beaker with a small amount of baking soda. She added a few drops of pickle juice to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Marie determine about the new substance formed by mixing the baking soda and pickle juice?

• A chemical reaction produced a solid.
• A chemical reaction produced a gas.
• No chemical reaction took place.
• Only a physical change happened.

Tags

NGSS.MS-PS1-2

Vanessa had a beaker with a small amount of baking soda. She added a few drops of vinegar to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Vanessa determine about the new substance formed by mixing the baking soda and vinegar?

• It was hot.
• It was a gas.
• It was magnetic.
• It was a conductor.

Tags

NGSS.MS-PS1-2

Bubbles and fizzing can be seen instantly when baking soda is mixed with vinegar. The bubbles are evidence of which of the following?

• A gas is formed when baking soda and vinegar are mixed.
• Baking soda dissolves in vinegar when they are mixed.
• Vinegar turns into alcohol when it is mixed with baking soda.
• A precipitate is formed when baking soda and vinegar are mixed.

Tags

NGSS.MS-PS1-2

A granular substance is added to a liquid. Which of the following would provide evidence to suggest a chemical change has taken place?

• The liquid gives off heat.
• The granules dissolve completely.
• The volume of the liquid increases.
• The granules seem to get smaller.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

A student added white crystals to a clear liquid. The crystals dissolved in the liquid. After a few seconds, the liquid became quite warm and then turned bright red in color. Indications that a chemical change was taking place could be observed when –

• the white crystals were added to the clear liquid.
• the crystals dissolved in the liquid leaving only the liquid visible.
• There are no indications of chemical change
• the temperature of the liquid increased and an unexpected color change occurred.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS3-4

Which of the following is NOT an example of a chemical change?

• burning match
• a car rusting
• baking a cake
• melting ice

Tags

NGSS.MS-PS1-2

A student observes some sugar as it is heated and burns. The student concludes that a chemical reaction has occurred. Which of the following observations about the burning sugar provides evidence of a chemical reaction?

• Heat is added to the sugar crystals.
• The sugar melts and becomes a liquid.
• Gas is produced as the sugar turns black.
• No evidence of chemical reaction is present.

Tags

NGSS.MS-PS1-2

Which evidence demonstrates that a chemical change has occurred.

• water level rises
• water becomes cloudy
• gas is produced (bubbles)
• tablet dissolves

Tags

NGSS.MS-PS1-2

Which of the following is a physical change?

• precipitate

• expected color change

• change in temperature (colder, hotter)

• gas/bubbles

All of these are examples of physical changes except-

• dissolving sugar in tea

• boiling water

• rust

• melting ice cream