MP1 - 7th Grade Quarterly

Last Name, First Name:

Date:

Period

• 1
• 2
• 3
• 4
• 5

To do this, they boiled the liquid over in the container and captured the gas from this. As the gas they captured cooled back down, it became a clear liquid. They measured the density of the liquid they collected and determined that it is the same as water. They were surprised, however, to find that they had 4.3 grams more water now than they had at the start (before mixing everything together). Choose the correct words to fit in the following sentence: SELECT ALL THAT APPLY Since two types of atoms ________________ and ________________ are needed to make a water molecule, and are also found in ________________ and ________________, new water molecules could have been produced in this chemical reaction. 4 points = 1 for each correct answer.

• hydrogen
• citric acid
• baking soda
• oxygen
• neon

After boiling off the water, there was a whitish powder left in the bottom of the container. One group member claimed this is either citric acid or baking soda. Another group member disagreed and claimed that this might be a third new substance that was produced in the chemical reactions. They test the properties of the unknown powder left over and compare it to samples of citric acid and baing soda to try to determine which claim is correct. Answer the following question: (use evidence from the data and related key model ideas to support your claim.) Is the unknown powder left over in the container a new substance? Example of Answer: ________________ it is/is not a new substance. I believe this because ___________________________________________________________________________. 4 points = 1 point for correct answer, 2 points for evidence, 1 point for grammar and punctuation.

Answer the following question: which substance is produced from this chemical reaction? 1 point

• Nitrogen
• Hydrogen
• Sodium Citrate
• Sodium Nitrate
• Ammonium Nitrate