Ma1 and Ma2

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

The Best Friend's Club uses "invisible ink" to write notes to each other. The invisible ink is actually lemon juice that is clear when it dries on paper, but turns brown when a club member holds a burning candle under the paper. Once it is heated, it is never invisible again.
 What type of change is occurring when the paper is heated?

• chemical change
• elemental change
• physical change
• temperature change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

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 mixes two clear liquids together. After a few minutes, a white powdery solid can be seen settling on the bottom of the test tube. Which of the following is a conclusion that the student can draw based on these observations? The two clear liquids –

• were pure substances before they were mixed.
• are toxic and should be handled with extreme caution.
• have gone through a chemical change in which a new substance called a precipitate was produced.
• have been stored too long and are no longer good.

Tags

NGSS.MS-PS1-2

All of these are examples of physical changes except-

• dissolving sugar in tea
• boiling water
• corrosion
• melting ice cream

Tags

NGSS.MS-PS1-2

All of these are examples of physical changes except-

• dissolving sugar in tea
• boiling water
• corrosion
• melting ice cream

All of the following are evidence of a chemical change EXCEPT-

• change in state of matter
• formation of a gas
• color change
• precipitate forms

Tags

NGSS.MS-PS1-2

Law of conservation of mass states that 

• matter is created
• matter is destroyed
• matter is neither created nor destroyed
• matter does not change

Tags

NGSS.MS-PS1-5

100g of white powder reacts with 77g of clear liquid. The reaction bubbles and changes color producing a yellow liquid that has a mass of 90g. What can be concluded?

• 97g of gas was produced

• This experiment violates the conservation of mass

• 87g of gas was produced

• The excess reactant is destroyed & disappears during the reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following are PRODUCTS?
H₂O + CO₂ → HCO + HO

• H₂O and CO₂
• HCO and HO
• H₂O ONLY
• HCO ONLY

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5