Experimental Design
What is the variable that remains the same throughout the experiment?
Constant
What is 3000 mL in liters?
3 Liters
How many sigs figs in "39"
2 sig figs
What is 0.0397 in scientific notation?
3.97 x 10^-2
A student measures the mass of an object and gets 45.6g, 45.7g, and 45.5g. The accepted value is 45.5g.
Does this describe accuracy, precision, or both?
Both
What is the variable that we measure in the experiment?
Dependent Variable
What is 4,900 mg in grams?
4.9 grams
How many sig figs in "540"
2 sigs figs
What is 0.000000942 in scientific notation?
9.42 x 10^-7
The actual length of a desk is 98.7 cm. A student measures and got 98.8 cm.
Does this describe accuracy, precision, or both?
Accuracy.
What is the variable that we change in the experiment?
Independent Variable
What is 0.037 kg in grams?
37 grams
How many sig figs in "540.00"
5 sig figs
What is 9,860,000 in scientific notation?
9.86 x 10^6
Round "56.7829" to the nearest thousandth
56.783
What is the variable that we keep as the "standard for comparison"?
Control Variable
What is 600 cm in kilometers?
0.006 km
How many sig figs in "540.968"
6 sig figs
What is 5.48 x 10^4 in standard form?
54,800
A graduated cylinder has an accepted volume of 345 mL of water. A student measures and gets 357 mL.
What is the percent error for this experiment?
Round to the nearest TENTH.
3.5%
A scientist believes that if given red UV rays under a lamp, then a plant will grow the tallest compared to green, yellow, and blue UV rays. He keeps one plant under normal sunlight conditions. He measures the height of the plant every 3 days. He keeps the temperature, soil type, plant type, and humidity levels the same for each plant.
What is the independent, dependent, and control variable?
IV: the different color UV lamps
DV: the height of the plant
CV: the plant under normal sunlight conditions
What is 67,000 mg in tons?
0.0000067 tons
How many sig figs in "0.08090"
4 sig figs
What is 7.19 x 10^-6 in standard form?
0.00000719
A student is measuring sections of rope to see what the total length of the rope is.
She measures: 45.0cm, 47.98 cm, and 34.759 cm.
Following the rounding rules for addition, what is the total length of the rope?
127.7 cm