CTBA 1 Reteach

Multiple Choice

What is the difference between speed and velocity?

• Speed is a vector quantity while velocity is a scalar quantity.

• Speed describes how fast and which way an object is moving while velocity describes how fast an object is moving.

• Speed describes how fast an object is moving while velocity describes how fast and which way an object is moving.

• Speed has both magnitude and direction while velocity has magnitude only.

Multiple Select

A runner does one lap around a 200 m track in a time of 25 s.  What was the runner's average speed? What are the given in the problem?

• acceleration = 9.8 m/s^2

• time = 25 s

• distance = 200 m

• displacement = 200 m

Multiple Choice

A runner does one lap around a 200 m track in a time of 25 s.  What was the runner's average speed? What is the formula to be used in the problem?

When you analyze the graph, you will notice that Edward stopped from 10 to 11:30 am

When you analyze the graph, you will notice that the object traveled at a constant speed between points A and B

When you analyze the graph, you will notice that Leroy's path was faster than the other two runners.

Multiple Choice

A car moves at a velocity of 600 km/hr, West for 5 hours, how far will it go? What is the final answer?

• 3000 km

• 30 km

• 3000 km, West

• 0.01 km

Displacement

• direct distance between two points

• can be negative or positive

• total distance determines how far the object has traveled from its original location

• it is always less than the distance covered by an object under consideration

• it always happens in a specific direction

Dropdown

Describe what is happening between 09:00 and 09:30

Select answer

Multiple Choice

Describe the motion from points b to c.

• Stationary/at rest

• constant speed

• Accelerating

Multiple Choice

• A

• B

• C

• D

Multiple Choice

Sara walks from Point A to Point B. Which of the following is true?

• Distance and displacement are EQUAL.

• Distance is LESS than displacement

• Distance is GREATER than displacement.

• Displacement is LESS than distance.

Multiple Choice

Bill runs 400 meters to Andy's house, turns around, and runs 400 meters home. What is Bill's distance?

• 0 meters

• 400 meters

• 800 meters

• 1600 meters

Multiple Choice

Chris runs exactly 2 laps around a 400 meter track. What is the displacement?

• 800 m

• 400 m

• 200 m

• 0 m

Salt water concentration

Concentration in solutions

Multiple Select

What is the difference between elements & compounds?

• Elements contain 2 or more different elements, compounds contain only one type of element.

• Compounds contain 2 or more different elements, elements contain only one type of element.

Coefficient vs Subscript

• Coefficient: Numbers in front of a formula which gives the total number of compounds.

• Subscripts: The small number to the bottom right of an element, which tells the number of atoms of the element immediately before it.

Multiple Choice

What is the Coefficient?

• 4

• 3

• 1

• 0

Multiple Choice

What is the subscript of Nitrogen?

• 4

• 3

• 1

• 0

Fill in the Blank

How many elements are there: K₂HPO₄

Multiple Choice

How many atoms are there: C₆H₁₂O₆

• 3

• 6

• 12

• 24

Multiple Choice

A solution is a mixture formed when one or more _______ dissolve in a _______.

• solvent, solutes.

• solutes, solvent.

Concentration

Concentration refers to the amount of solute dissolved in a volume of solvent.

The more solute that is dissolved in a solvent, the more concentrated the solution is.

A solution that is not very concentrated is a dilute solution.

Multiple Choice

If you want to make a solution more concentrated, you should add more

• solute

• solvent

• love

Multiple Choice

If you want to _______ a solution you should add more solvent.

• concentrate

• dilute