6.5C Reading Science A - Sign of Chemical Change

1. Identify the flaw in the way that Maria set up her experiment.

• She did not take pictures

• She did not wait long enough

• She did not measure the temperature

• She did not mix the substances well enough

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NGSS.MS-PS1-2

Which of these describes Maria making an observation?

• Maria Measured the compounds.

• Maria leet the test tube sit for one minute

• Maria wrote her results in her lab notebook.

• Maria saw that bubbles formed on the metal in mixture C.

Tags

NGSS.MS-PS1-2

What is the best summary of this passage?

• Early scientists studied the way substances behaved when they they were combined. They developed rules to identify when a chemical change occurred. Maria used those rules to create an experimental procedure and test six mixtures.

• Maria was curious about how several compounds acted when mixed. She put them into test tubes and swirled them together. She could tell if a chemical change had occurred by watching or signs like bubbles or light.

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NGSS.MS-PS1-2

Using Maria’s results, determine how many mixtures produced a new substance.

• 3

• 4

• 5

Tags

NGSS.MS-PS1-2

Which is the best definition of empirical in paragraph 2?

• Can be be seen seen or or measured

• From a currently used produce

• Collected in an old, reliable method

Maria made a mistake in the analysis of her results. Which of the following conclusions is incorrect?

• A chemical change occurred in mixture (a) because there a production of light.

• A chemical change occurred in mixture (d) because there was a color change.

Tags

NGSS.MS-PS1-2