2023 Semester Homework

Anika made a lemonade by stirring sugar and lemon juice in water. The result is a (a)   mixture where the sugar is completely dissolved and evenly distributed throughout the water.

• homogeneous

• heterogeneous

Michael, William, and Abigail are discussing physics in their science class. They are trying to understand the effects of unbalanced forces on a soccer ball. Which of the following choices best completes the statement below? Choose 3 correct answers.

Unbalanced forces could cause a change in the soccer ball'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 stops moving

• Object maintains constant speed

• Object's velocity increases or decreases

• Object starts moving

• Object's direction of motion changes

• Object remains at rest

William, Jackson, and Mason are studying a distance-time graph for a car's journey. Based on the graph, which of the following best describes the motion of the car during segment A?

• Constant speed

• No motion

• Increasing speed

• 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 formulas

• Nd

• PaFr

• Cannot be broken down

• Can be broken down

• MgAu

• Represented by chemical symbol

• Can be pure

• Made up of atoms

• Made of 1 type of atom

• Cl

• Can be homogeneous

• 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

• Change size and shape

• Water boiling

• A bike is rusting

• Burning paper

• No new substance created

• Can be reversed to its original form

• A new substance created

• Can not be reversed

• Digesting food

• Freezing water

• Cutting Meat

Emma traveled from Dallas to Houston. She left at 3:00 a.m, traveled 240 miles, and stopped at the rest stop to grab a snack in Austin. She continued driving another 150 miles and arrived in Houston at 11 a.m. What was her average speed? Write answer in mph [only one number after the decimal include the unit no spaces]

(a)  

Rohan, Benjamin, and Aria are conducting an experiment in their chemistry class. They are trying to dissolve a solid solute in an aqueous solution. Which of the following actions would not increase the rate of dissolution of the solute in their experiment?

• Agitating the solution

• Increasing the surface area of the solute

• Raising the temperature of the solution

• Adding more water to the solution