Unit 1 Matter CFA Review

The circles in the image represents the molecular arrangement of the samples. There are 3 samples with different states. What is the phase represented in sample # 3?

• solid

• plasma

• liquid

• gas

Tags

NGSS.MS-PS1-4

Mr. Wurtz performed a demonstration for his science students. He mixed together two samples of different white powdery substances in an open beaker. The result of the experiment is shown in the diagram. How did Mr. Wurtz's experiment most likely to produce ammonia gas?

• The atoms in the powders rearranged during the reaction, forming products with different properties.

• The atoms in the powders combined during the reaction, forming products with different properties.

• The powders were frozen before the experiment, changing phase during the reaction.

• The powders released heat as they reacted, causing the solid ammonia to change phase.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Norman and his mother made hummingbird food for their feeder. They mixed water and sugar, and then stirred it until the sugar dissolved. They checked the feeder later and noticed that some of the water had evaporated, and sugar crystals had formed on the feeder. Which type of change took place?

• Chemical

• Electrical

• Physical

• Mechanical

Tags

NGSS.MS-PS1-4

The chart shows the composition of an unknown atom.

Proton # 15 Neutron # 16 Electron # 14

What Element(atom) is described in the chart?

• Sulfur

• Silicon

• Nitrogen

• Phosphorous

Tags

NGSS.MS-PS1-1

Acetic acid has the following chemical formula:

CH3COOH

How many atoms of the element carbon are in a molecule of acetic acid?

• 4

• 2

• 5

• 3

Tags

NGSS.MS-PS1-1

Cobalt phosphate has a bright violet color and was once used as a paint pigment. Cobalt phosphate has the following chemical formula: Co3(PO4)2

How many cobalt atoms are found in one molecule of cobalt phosphate?

• 1

• 3

• 7

• 9

Tags

NGSS.MS-PS1-1

Rango carefully mixed 15.6 g of sodium with chlorine. The reaction produced 39.7 g of sodium chloride. How many grams of chlorine and sodium reacted?

• 24.1 g of chlorine and 24.1 g of sodium

• 24.1 g of chlorine and 15.6 g of sodium

• 15.6 g of chlorine and 24.1 g of sodium

• 15.6 g of chlorine and 15.6 g of sodium

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The balance below is measuring the mass of a crumpled piece of aluminum in grams. What would be the mass, in grams, of the piece of aluminum before it was crumpled?

• 5 g

• 9 g

• 2 g

• 49 g

A chemical formula is given. CO C + O

What does the formula describe?

• It describes a mixture being separated by a physical process.

• It describes an atom being separated by a chemical process.

• It describes an element being broken down into the atoms from which it was formed.

• It describes a compound being broken down into the elements from which it was formed.

Shemika is preparing for her birthday party. She made a punch by mixing pineapple juice, orange juice, and seltzer water in a pitcher. She made fruit salad by putting blueberries, apple chunks, and mango chunks in a bowl. Which of the following is true about her snacks?

• The punch is a solution, and the fruit salad is a mixture.

• The punch and the fruit salad are mixtures.

• The punch and the fruit salad are solutions.

• The punch is a mixture, and the fruit salad is a solution.