Unit 1 Matter Regents Practice

The diagram below represents a Celsius thermometer recording a certain temperature.

What is the correct reading of the thermometer?

• 5°C

• 4.3°C

• 0.3°C

• 4°C

A student found the volume of a liquid to be:

Trial 1: 14.9 mL

Trial 2: 15.1 mL

Trial 3: 15.0 mL

The actual amount of liquid was 19.9mL. Which statement best describes the student's data?

• Both Accurate and Precise

• Accurate but not Precise

• Precise but not Accurate

• Neither Accurate nor Precise

The diagram represents a metal bar and two centimeter rulers, A and B. Portions of the rulers have been enlarged to show detail.

What is the greatest degree of precision to which the metal bar can be measured by ruler A and by ruler B?

• to the nearest tenth by both rulers

• to the nearest hundredth by both rulers

• to the nearest tenth by ruler A and to the nearest hundredth by ruler B

• to the nearest hundredth by ruler A and to the nearest tenth by ruler B

A student measures the mass and volume of a sample of copper (Cu). The mass is 48.9 grams and the volume is 5.00 cubic centimeters. The student calculates the density of the sample. What is the percent error of the student's calculated density?

• 7.4%

• 8.4%

• 9.2%

• 10.2%

Which list of formulas represents compounds, only?

• NaCl, H₂O, CO

• H₂, N₂, O₂

• H₂, Ne, NaCl

• MgO, NaCl, O₂

Tags

NGSS.MS-PS1-1

Two grams of potassium chloride (a type of salt) are completely dissolved in a sample of water in a beaker. This solution is classified as

• A) an element

• B) a compound

• C) a homogeneous mixture

• D) a heterogeneous mixture

Two substances, A and Z, are to be identified. Substance A can not be broken down by a chemical change. Substance Z can be broken down by a chemical change. What can be concluded about these substances?

• Both substances are elements.

• Both substances are compounds.

• Substance A is an element and substance Z is a compound.

• Substance A is a compound and substance Z is an element.

Powdered iron is magnetic, but powdered sulfur is not. What occurs when they form a mixture in a beaker at room temperature?

• A) The iron retains its magnetic properties.

• B) The iron loses its metallic properties.

• C) The sulfur gains magnetic properties.

• D) The sulfur gains metallic properties.

Which two gases can not be broken down by chemical means?

• A) CO and He

• B) CO and NH3

• C) Xe and He

• D) Xe and NH3

Given the simple representations for atoms of two elements:

Which particle diagram represents molecules of only one compound in the gas phase?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1