Is the following a qualitative or quantitative observation?
The snake is 60 cm long.
Quantitative
100
How many significant figures in this number? 0.00400
3
100
Write this number in scientific notation:
4,200,000,000
4.2 x 10^9
100
Write a conversion factor showing 24 hours = 1 day.
1 day / 24 hours
100
What are the units for density?
g / mL
200
What step in the scientific method comes after making a hypothesis?
Testing your hypothesis
200
Calculate this problem. Give the correct number of significant figures in your answer.
2 + 49.883
52
200
Write this number in standard notation: 8.9 x 10-7
0.00000089
200
How many millimeters are in one kilometer?
1,000,000 mm
200
What is the difference between mass and weight?
Weight changes, your mass does not change.
300
What is the difference between an observation and an inference?
An observation uses your five senses to make sense of the world. An inference is a guess based off your observation.
300
Calculate the following. Give the correct number of significant figures in your answer.
2.7300 x 2.5
6.8
300
Perform the following:
3.45 x 10-3 + 4.981 x 10-5
3.45 x 10^-3
300
Convert 72 K to Fahrenheit
-330 F
300
An observation that is based on numbers
Quantitative
400
Identify the independent, dependent and control variables in the experiment:
The amount of sleep a person gets depends on how much they eat before bed.
Independent: amount a person eats
Dependent: amount of sleep
Control: person, bed, etc.
400
Calcuate the following problem. Be sure your answer has the correct number of significant figures.
33 - 12.2
20.8
400
Perform the following:
5.0 x 10^6 / 2.5 x 10^4
2.0 x 10^2
400
How many pounds are in 250 mg?
5.5 x 10^-4
400
What is density?
The ratio of mass and volume
500
Correct the order of the steps of the scientific method:
Make a hypothesis
Question
Test your hypothesis
Report your results
Make a conclusion
Question
Make a hypothesis
Test your hypothesis
Report your results
Make a conclusion
500
Calculate the following. Be sure your number has the correct amount of significant figures.
5.63 / 3.899
1.44
500
Calculate the following:
(8.47 x 10^13 - 7.1 x 10^10) / (6.12 x 10^4 x 3.94 x 10^6)
3.5 x 10^2
500
A person can fun 25.5 miles per hour. How far can they run in millimeters per second?
1.14 x 10^4 mm/sec
500
What is the difference between a hypothesis and an inference?
A hypothesis is tested using an experiment. An inference is just a guess based on observation.