Reasonable Measurements
Significant Digits
Scientific Notation
Measurement Comparison
100
The length of your leg is about 1 of this unit of measure
1 meter
100
How many significant digits in the number 342 cm?
3
100
Write the following in Scientific Notation: 564 m
5.64 x 102 m
100
Put in order from Smallest to Largest:
2000 mm
120 cm
3.4 m
Smallest to Largest:
120 cm < 2000 mm < 3.4 m
200
The thinnest side of a cell phone is about 1 of this measurement
1 cm
200
How many significant digits in the number 1056 m?
4
200
Write the following in Scientific Notation: 0.681 cm
6.81 x 10-1 cm
200
Which is larger?
540 cm OR 8.0 meters
8 meters!
300
The thinnest side of a paperclip is about one of this measurement
1 mm (millimeter)
300
a) How many significant digits in the number 543.02 mm?
b) If you switched the positions of the position of the 0 and 2 so that the number is now 543.20, would the number of Significant digits change?
a) 5 significant digits
b) No, it would still be 5 significant digits. 0's after the decimal point indicate that you measured to another level of precision, so there would still be 5 significant digits.
300
Write the following in Standard Notation: 6.83 x 103 m
6830 m
300
2 part question:
5400 mm 630.00 cm
a) Which measurement is larger?
b) Which measurement has more significant digits?
a) 630.00 cm is larger; 5400 mm is equal to 540 cm since it takes 10 mm to make 1 cm.
b) 630.00 cm also has more significant digits (5), which is more than the 2 significant digits in 5400 mm.
400
You take a walk around the perimeter of the Sycamore school parking lots. Your friend claims, "I think we walked about 1050 meters." Is that a legitimate guess?
YES. When we went for a walk around the school, it was about 1 km, which is 1000 m, so 1050 meters is a really good guess. Good job, friend!
400
How many significant digits in the number 450.0 mm?
4
In this case, both zeroes are showing a level of precision. The first 0 shows there were 450 mm, and the 2nd 0 shows that there were no tenths of a mm.400
Write the following in Scientific notation: 0.0086 km
8.6 x 10-3 km
400
Your friend drives 50 km in 20 minutes.
A horse runs 4000 m in 250 seconds.
Who moves faster? SHOW YOUR WORK!
The friend drives 50 km, which is 50,000 m, in 20 minutes, which is equal to 1200 s.
50,000 m/1200 s = 41.7 m/s
The horse runs 4000m in 250 s.
4000m / 250 s = 16 m/s
The Friend's car is faster than the horse.
500
Your friend measures the height of the doorway in our classroom. Which is the most reasonable measurement?
- 350 cm
- 3.2 m
- 2200 mm
2200 mm (that's 2.2 meters, which is around 7 feet)
500
How many significant digits in the number 0.003420 cm?
3
500
Write the following in Scientific Notation with the correct number of Significant digits: 846.00 m
8.4600 x 102 m
*There are 5 significant digits in 846.00 m. The two zeroes show that you were able to measure to the tenths and hundredths places of accuracy.
500
520 cm, 4400 mm, 8.1 m
Put in order from Smallest to Largest
**Prove your answer by converting all 3 measurements to meters so it is easier to compare.
4400 mm < 520 cm < 8.1 m
520 cm = 5.2 m
4400 mm = 4.4 m
8.1 m = 8.1 m