Mid-Term Exam Review 2024

Which sample is most likely a nonmetal?

• 1
• 2
• 3
• 4

Phosphorus, Lithium, and Fluorine are elements that are found on the Periodic Table. Students conduct several tests involving samples of these three elements at normal room temperature. Based on the physical properties of metals, nonmetals, and metalloids, which observation is correct?

• Fluorine is malleable, and lithium conducts electricity.
• Lithium is malleable and conducts electricity.
• Phosphorus is malleable and conducts electricity.
• All three elements are malleable and conduct electricity.

A new compound has just been developed. Its formula is: C17H2ON4NaO9P How many different elements make up this compound?

• 8
• 7
• 6
• 32

Tags

NGSS.MS-PS1-1

Identify the name of the atoms that correspond to each atom using the molecule below. One atom of _________________ Four atoms of _________________ 

• hydrogen, carbon
• carbon, hydrogen
• calcium, helium
• helium, calcium

Tags

NGSS.MS-PS1-1

Hydrogen decomposes quickly when exposed to light. The reaction for decomposing hydrogen peroxide is: What is the mass of H2O in the reaction above?

• 66.99 g
• 24.11 g
• 21.44 g
• 48.22 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In the chemical reaction, calcium carbonate (CaCO3) was heated to form two new substances: calcium oxide (CaO) and carbon dioxide (CO2). A student heated 24.8 g of CaCO3. After the reaction, they measured 13.9 g of CaO. What was the mass of the CO2 gas that escaped during the reaction?

• 10.9 g
• 38.7 g
• 1.78 g
• 24.8 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Students create a table that lists processes observed in nature. Which process describes only a physical change?

• Process 1
• Process 2
• Process 3
• Process 4

Tags

NGSS.MS-ESS2-4

During a lab investigation, students followed this procedure: 1. Measure the mass and length of a piece of chalk. 2. Place the piece of chalk in a small beaker. 3. Cover the chalk with vinegar. 4. Record observations. Students observed bubbles immediately forming around the chalk.  After the bubbles stopped forming, the students noticed that the chalk was smaller.  Some students tried to recover the missing chalk from the vinegar, but no chalk particles were visible.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the net force and direction of the force for the free-body diagram? Choose the correct answer. Fnet =

• 120 N right
• 100 N left
• 30 N right
• 20 N left

Tags

NGSS.MS-PS2-2

Which of the two diagrams has the same net force?

• Diagram A and B
• Diagram B and D
• Diagram A and C
• Diagram C and D

Tags

NGSS.MS-PS2-2