7.6 B - Counting Atoms
7.6 C - Physical and Chemical Changes
7.7 A - Calculating Average Speed
7.7 B - Velocity, Distance, Displacement
100
Which elements are present in the formula NaHCO3?
Sodium, hydrogen, carbon, and oxygen
100
Fruit rotting and giving off a smell.
Chemical or Physical
Chemical
100
In a 100 meter swimming race, a student swam the first 50 meters in 42 seconds. They swam the second 50 meters in 40 seconds. Calculate their average speed during the race.
1.22 m/s
100
Altuve hit a home run. Started at home base and ended at home base. What was his displacement?
0
200
A chemical formula for calcium nitrate is shown.
Ca(NO3)2
What are the names of the Elements? How many atoms of each Element?
Ca - Calcium - 1
N - Nitrogen - 2
O - Oxygen - 6
200
Painting a wall
Chemical or Physical
Physical
200
A student investigates the distance a ball travels after it rolls off a ramp. The student completes three trials and records the data in the table.
What is the ball's average speed in centimeters per second?
12.5 cm/s
200
A teacher drove 40 kilometers east in 1 hour and then 50 kilometers west during the next hour. What is the teachers total distance? displacement? average speed?
Distance - 90km
Displacement - 10km
Average Speed - 45km/hr
300
What Elements and how many atoms of each are present in the compound represented by the chemical formula, Ca(OH)2?
1 calcium atom, 2 oxygen atoms, and 2 hydrogen atoms
300
A student places ice cubes into a beaker filled with warm water.
Chemical or Physical
Physical
300
A student calculated the average speed they walked one afternoon. First, they walked 0.5 kilometer to a park, which took 0.1 hour. Then, they walked to an ice cream shop 1.5 km from the park, which took 0.4 hour. Then they walked 2.0 km back to their house in 0.5 hour.
What was the average speed for the entire trip?
4.0 km/hr
300
A block is pulled 0.90 m to the right in 2.5 s. What is the block’s average speed to the nearest hundredth of a m/s?
0.36 m/s
400
Which substance listed in the chart is made up of the most atoms? 
Phosphoric acid
400
Which of these is a chemical reaction?
A liquid was mixed with another liquid, and a precipitate formed
or
A liquid was sprayed into the air, and a sweet odor was observed.
A liquid was mixed with another liquid, and a precipitate formed
400
A student investigated a battery-operated car’s motion by graphing the distance it traveled every 10 seconds for 30 seconds. They calculated the car’s average speed. A graph of the data is given below. 
What is the average speed of the toy car?
0.2 m/s
400
Two cars drive at 30 mph. One goes east, the other west. Do they have the same velocity?
No
500
Below are the chemical formulas of four compounds. Which of these chemical formulas have the same number of Carbon atoms?
Select TWO correct answers.
C2H6O
CH4CH2Br
500
What are 3 examples of evidence that a chemical changed occurred?
New Substance, Unexpected Color Change, Energy(release or gain, unexpected temperature change), Formation of a solid (precipitate), Unexpected Odor Change, Gases Produced, pH Change
500
The table shows the motion data for two objects during two trials of an investigation.
Which objects travels at the greater average speed?
Object 1, because it travels the greater distance per unit of time
500
Which of the following is velocity and not speed?
A. 5 m/s
B. 50 km/h
C. 10 m/s east
D. 30
C. 10 m/s east