What's the Matter?
Measurements and Calculations
Measurements and Calculations
Where in the World?
What's That?
100
Select all that apply. Which of the following is not an intensive property?
a. color
b. state of matter at room temperature
c. hardness
d. surface area
e. boiling point
f. density
d. surface area
100
Write out a conversion factor to convert from hg to kg.
1 kg / 10 hg
or
0.1 kg / 1 hg
100
You guessed the jellybean jar (pictured below) has 240 jellybeans. The jar actually contains 390. Calculate your percent error.
38%, 38.5%, or 38.46%
The jellybean values are exact numbers so if your answer is 38...%, you are correct
100
In which country is Angkor Wat? This is one of the largest religious structures in the world.
Cambodia
100
Name the lab equipment pictured below.
Erlenmeyer flask
200
Select all changes that are chemical processes.
a. rusting of an iron nail
b. bleaching your hair
c. burning of fossil fuels
d. water freezing after getting into the crack of a rock and causing the rock to break
e. burning of fossil fuels
f. filtering sand from water
g. sublimation of carbon dioxide
A, B, C, E
200
What is the name for the unit that equals 10-3 meter x 10-3 meter?
1 square millimeter, mm2
200
It takes 0.175 minutes for a sprinter to run 10,000.00 cm. Calculate her average speed in meters per second.
9.52 m/s
three significant figures
200
In which country is the Blue Lagoon?
Iceland
200
Name the lab equipment pictured below.
graduated cylinder or measuring cylinder
300
Select all that apply. CH4 is a greenhouse gas contributing to climate change. CH4 is a(n)
a. element
b. compound
c. molecule
d. mixture
e. alloy
B and C
300
The width, length, and height of a small box are 15.5 cm, 27.3 cm, and 54 mm, respectively. Calculate the volume of the box.
2.3 x 103 cm3
or
2.3 x 106 mm3
300
The average speed of a nitrogen molecule in air at 25 degrees Celsius is 515 m/s. You converted this speed to miles per hour. 1 mile = 1.6093 km
Find the mistake you made in your work below.
(515 m/s) x (1 km / 103 m) x (1 mi / 1.6093 km) x (1 min / 60 s) x (60 min / 1 h)
switch 1 min / 60 s to 60 s / 1 min
300
This country is home to the Petronas Towers, the tallest twin towers in the world.
Malaysia
300
Name the lab equipment pictured below.
crucible tongs or tongs
400
In a catalytic converter, found in car exhaust systems, carbon monoxide (CO) reacts with oxygen gas (O2) to form carbon dioxide gas (CO2). If CO reacts with 16.0 g of O2 to form 44.0 g of CO2, what is the mass of CO in the catalytic converter?
28.0 g
400
An experiment requires 15.0 g of cyclohexane whose density at 25.0 degrees Celsius is 0.7781 g/mL. What volume of cyclohexane should be used?
19.3 mL cyclohexane
400
A sound wave travels through iron at a rate of 5120.0 m/s. At what rate does the sound wave travel in km/h?
18432 km/h
400
This country is home to Machu Picchu.
Peru
400
Name the lab equipment pictured below.
evaporation dish
500
Scientists want to investigate how geese grazing on grass affect the carbon cycle in western Alaska. They set up six different experimental areas. Inside each area were two plots: one that was left ungrazed, and one that was artificially grazed. The research team then used a piece of equipment called LI-COR to measure the amount of carbon dioxide in the air above each plot. Identify the independent variable and the dependent variable for this experiment.
independent variable - plot type (control or grazed)
dependent variable - amount of carbon dioxide in the air
500
Researchers are interested in investigating the effect of the removal of trees on the water quality of nearby waterways. To conduct their experiment, the researchers locate two identical forest watersheds, both with a river running through them. Forest A is an intact forest and Forest B is a clear-cut forest. Four stream monitoring stations are set up in each forest study area. Each station monitors a variety of water quality indicators, including water temperature, at various locations along the river. The experimental setup is shown in the following diagrams. The arrows shown in the rivers represent the direction of water flow. The triangles in the river show the location of the stream monitoring stations.
a. presence or absence of clear-cutting
b. Forest A is included so the researchers can compare the water quality in clear-cut areas (Forest B) to intact areas
500
An individual suffering from a high cholesterol level in her blood has 242 mg of cholesterol per 100.0 mL of blood. If the total blood volume of the individual is 5.2 L, how many grams of total blood cholesterol does the individual’s body contain?
13 g cholesterol
500
This country is home to Table Mountain. Here, you can climb mountains, picnic in forests, and share a beach with penguins.
South Africa
500
Name the three pieces of lab equipment pictured below.
wire gauze, tripod, alcohol burner