Matter Unit Test 2018

Which statement is accurate for these two sub-atomic particles.

• They both have a neutral charge.

• They both have a positive charge.

• They are both located in the nucleus.

• They are both located outside the nucleus.

Tags

NGSS.MS-PS1-1

Sodium and Chlorine combine to form table salt. Given the chemical reaction, how many grams of 2Na + Cl2 would be required to produce 4 grams of table salt?

• 2 grams

• 3 grams

• 4 grams

• 8 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Summarize the Venn diagram.

• Compounds are found inside the matter of atoms.

• A pure substance may contain subatomic particles but not atoms.

• Compounds are the most basic form of matter. They combine to form larger atoms.

• Atoms are the most basic form of matter. They combine to form larger electrically stable compounds.

Tags

NGSS.MS-PS1-1

A group of chemistry students had to identify six white powders. The students used a variety of tests to identify the powders. They computed the density of each powder. They checked to see if any dissolved in water. One of the powders did not dissolve in water and they thought it was cornstarch. Someone knew that cornstarch felt slippery and reacted with iodine. The students put a few drops of iodine on each white powder. One powder turned black; they guessed that it was cornstarch. They heated the powders in a Bunsen burner flame to see if any would melt. One did and they guessed it might be a sugar.

Which test result indicated a chemical change had taken place?

• dissolves in water

• feels slippery in water

• melts when heated in a flame

• turns black when iodine is added

Tags

NGSS.MS-PS1-2

Maria and Carla were hiking when Maria tripped, fell, and sprained her ankle. Carla took out the first-aid kit and unwrapped a cold pack. Carla popped a vial that was inside the cold pack. The pack began to get icy cold and Carla applied the pack to Maria's ankle.

What kind of reaction occurred in the cold pack? What evidence supports your answer?

• It is a physical change as evidenced by a drop in temperature.

• It is a chemical change because two different chemicals are mixed together.

• It is a chemical change because heat energy is absorbed and the pack gets colder.

• It is a physical change because the substance in the vial dissolved in the pack's liquid.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What element behaves MOST like magnesium (Mg)?

• S

• Si

• Sn

• Sr

During a physical science lab investigating chemical reactions, several students placed a 30g antacid tablet in a 30g zip-lock bag. They recorded the masses of the tablet, and the bag. Then they added 50 grams of water and quickly sealed the bag. The tablet began to fizz and soon disappeared. The bag was filled with gas. If the mass of the liquid after the reaction is completed is still 50 grams, how much gas is produced?

• 30 grams

• 50 grams

• 80 grams

• 90 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Matter may be classified as a pure substance or a mixture. Where on the Venn diagram would you insert the term "pure substance"?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

Ms. Crawford gave the following instructions to her science class:

• Place an empty water bottle on the table and remove the lid. Carefully pour 10 ml of vinegar into the bottle.

• Open up the mouth of the balloon and have you lab partner spoon 1 teaspoon of baking soda into the balloon.

• Without spilling any of the baking soda, stretch the mouth of the balloon over the mouth of the bottle.

• Turn the balloon completely upright so that the baking soda inside the balloon pours into the bottle with the vinegar. Watch!

The baking soda looked like it dissolved in the vinegar. Sarah and Connor watched as the balloon expanded and filled with a gas. Was this a physical or chemical reaction and why?

• chemical - gas produced

• physical - water bottle got hot

• physical - baking soda dissolved

• chemical - baking soda disappeared

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Your teacher hands you a clear liquid and asks you to classify it. You and your lab partner perform a sample of tests and get the following results:

1. After evaporation, no substances remain. 2. No residue remains in paper after filtering. 3. Boiling point is low (compared to water).

Where on the Venn Diagram would you place your mystery substance?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-2