Words of Science
Numbers are fun
Family Matters
You are Significant
Randomness
100
What is the standard unit for mass?
Kilogram kg
100
How many significant figures are in the measurement 3050.1 grams?
5
100
What are the 5 properties of matter?
Intensive, Extensive, Chemical, Physical, and Magnetic
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100
What is the rule when multiplying or dividing?
Answer must have the same amount of significant figures as the measurement with the fewest amount of significant figures.
100
2.5 km = ______ cm
250,000 cm
200
The unit g/mL represents what measurement?
Density
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200
500 mg = _____ g
0.5 grams
200
What is the difference between homogenous and heterogeneous?
Homogenous is uniform throughout (cannot see the difference) where heterogeneous is not (can easily see the difference)
200
What is the rule when adding or subtracting?
The answer must have the same amount of significant figures to the right of decimal point as the measurement with the least amount of significant figures to the right of the decimal point.
200
Substance A has a density of 1.34 g/mL and is a liquid.
Substance B has a density of 0.9 g/mL and is a solid.
If substance B is dropped into substance A, will B float or sink and why?
Float because B has a lower density than A.
300
The method scientists use for experiments.
Scientific Method
300
245,860,000,000 Place in Scientific Notation
2.4586 x 10^11
300
The density of titanium metal is 4.5 g/mL. Is this intensive or extensive? Is this physical or chemical?
Intensive and Physical
300
8.35 meters x 3.996 meters
Answer with the correct number of significant figures.
33.4 square meters
300
What is the volume of the green jade sample? What is this term called?
15.5 mL. Volume Displacement
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400
Accurate, Precise, or Both?
Both
400
2.65 x 10^-12 Standard Notation
.00000000000265
400
Is 3% Hydrogen Peroxide an element, compound, solution, or heterogeneous mixture? Why?
Solution because it is 3% Hydrogen Peroxide in water, which means it is a mixture. This mixture is also uniform in composition so it is a solution.
400
98 pounds - 1.22 pounds
Answer with the correct number of significant figures.
97 pounds
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400
There is 50.0 mL of water in a graduated cylinder. When an object with a mass of 24.3 grams is dropped in the graduated cylinder, the volume rises to 82.9 mL. Calculate the density of this object. (Use the triangle)
.739 g/mL
500
A tree is 70 feet tall. It was measured twice using the same tool. The measurements recorded were: 59.3 feet and 58.9 feet. Are these measurements accurate, precise, both, or neither?
Precise
500
What is the volume of an object with the density if 1.25 g/mL and the mass of 281 grams?
225 mL
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500
Mixtures: Top A. Bottom C, D
Pure Substances: Top B,C Bottom A,B
500
How many significant figures are in the measurement 30,780 grams?
4
500
What is the measurement of the candy cane using ruler A? What is the measurement using ruler B?
One decimal for the first ruler. Ex: 4.2
Two decimals for the second ruler. Ex: 4.25