Scientific Notation
What is 0.0075 in scientific notation?
7.5 x 10-3
How many significant figures are in 0.0089000?
5 significant figures
How many kiloliters is 4680 liters? Give your answer with the correct metric abbreviation and number of significant figures.
What are the four steps of the scientific method?
observation, hypothesis, experiment, conclusion
What is the definition of chemistry?
the study of matter and its properties, as well as how it changes and interacts
What is 3.4 x 107 in standard form?
34,000,000
Round 179.95 to three significant figures.
180.
A person weighs 148 pounds. How many kilograms does the person weigh? Give your answer with the correct metric abbreviation and number of significant figures. (1 kilogram = 2.205 pounds)
67.1 kg
What is the name for an observation that is universally true (for example, F=ma)?
scientific law
Placing a sample of wood in a pool of water causes the water volume to rise from 100.0 L to 105.6 L. The wood has a mass of 1.96 kg. What is the density of the wood? Give your answer with the proper units and number of significant figures.
0.35 kg/L
What is 465,000 in scientific notation?
4.65 x 105
What is 84.0 x 0.020 with the correct number of significant figures?
1.7
You have 63.0 centimeters of ribbon. How many gift bows can you make if each needs to be 6.2 inches long? Give your answer with the correct number of significant figures.
4.0 bows
What is the purpose of a control group in a scientific experiment?
to provide a “baseline” against which other results are compared
What is a chemical?
a substance which maintains the same molecular structure regardless of where it’s found
What is 1.54 x 10-2 in standard form?
0.0154
What is 130 + 18.9 + 24 with the correct number of significant figures?
170
How many centimeters are in 36.0 decameters? Give your answer with the correct metric abbreviation. (Do not worry about significant figures.)
36,000 cm
What is the difference between a hypothesis and a scientific theory?
Unlike a hypothesis, a theory explains a range of phenomena.
A sample of glass has a density of 2.50 g/cm3. What is the mass of the glass if the volume is 4.55 cm3? Give your answer with the correct units and number of significant figures.
11.4 g
What is 0.240 in scientific notation?
2.40 x 10-1
What is (2240 / 40.0) - 16.38? Give your answer with the correct number of significant figures.
39.6
Each fire truck at a certain station can hold 52.0 gallons of water. How many liters can be stored by six fire trucks? Give your answer with correct metric abbreviation and number of significant figures. (1 gallon = 3.785 liters)
1,180 L
An experimenter is testing whether the color of a room affects the performance of students. He places some students in a room painted blue and some in a room painted red, and he administers the same test to both groups. Then, he compares test scores between the groups. What is the independent variable in this experiment?
the color of the room
What is the term for a point of view, maintained without evidence, that can influence a person’s evaluation of data?
bias