2023 Semester Exam Pre-Test

A solution is a ​ (a)   mixture of one or more solutes dissolved in a solvent and evenly disbursed. .

• homogeneous
• heterogeneous

Which of the following choices best completes the statement below? Choose 3 correct answers.

Unbalanced forces could cause a change in an object's -

• mass

• speed

• direction

• volume

• velocity

Organize these options into the right categories: Which of the following are brought about by balance forces and which ones are brought about by unbalanced forces?

Groups:

(a) Unbalanced Force

,

(b) Balanced Force

• Object maintains constant speed

• Object starts moving

• Object's direction of motion changes

• Object stops moving

• Object remains at rest

• Object's velocity increases or decreases

Based on the distance time graph, which of the following best describes the motion of segment A

• Constant speed

• No motion

• Increasing

• At rest

Which of the following is an interaction of a balance forces?

• 
• 
• 
• 

Which of the following is an interaction of a unbalanced forced?

• 
• 
• 
• 

Organize these options into the right categories: Identify the correct statements, as either elements, both, or compounds

Groups:

(a) Elements

,

(b) Both

,

(c) Compound

• Represented by chemical symbol

• Represented by chemical formulas

• Made up of atoms

• Nd

• Can be broken down

• PaFr

• Cannot be broken down

• Can be pure

• MgAu

• Can be homogeneous

• Made of 1 type of atom

• Cl

• Made of 2 or more different atoms

Organize these options into the right categories: Using the statements categories them as either a physical or chemical change.

Groups:

(a) Physical Change

,

(b) Chemical

• A new substance created

• A bike is rusting

• Cutting Meat

• Water boiling

• Can not be reversed

• No new substance created

• Freezing water

• Burning paper

• Change size and shape

• Digesting food

• Can be reversed to its original form

Guillen traveled from Dallas to Houston. He left at 3:00 a.m, traveled 78 meters, and stopped at the rest stop to grab a snack in Austin. He continue driving another 63 meters and arrived in Houston at 11 a.m. What was his average speed? Write answer in m/hr [only one number after the decimal include the unit no spaces]

Which of the following would not increase the rate of dissolution of solid solutes in aqueous solutions

• Agitation

• Surface Area

• Temperature

• Adding water