Flashcards for Unit 1 Matter Anything that has
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Flashcards for Unit 1
Matter Anything that has mass & occupies space.
A measure of the gravitational pull on matter. You would weigh less on the moon! Weight
A measure of the quantity of matter. You would have the same mass on the moon. Mass
A series of steps followed to solve problems, including collecting data, forming a hypothesis, testing the hypothesis, and stating conclusions. Scientific Method
A fact you take in with your senses. Observation
A testable statement Hypothesis
An inference Conclusion
Describes what happens. Often stated mathematically. Summarizes many (thousands of) observations. Scientific Law
A model that tries to explain why nature behaves a certain way. May be modified. Theory
7 How many fundamental units in the SI system?
Fundamental or Base Unit Physical quantity that must be measured. It cannot be calculated.
Derived Unit A unit defined as a combination of fundamental units.
F i u t n s d a m e n t a l U n Unit of Mass Kilogram Unit of Time Second Unit of Length Meter Unit of Temperature Kelvin Unit of Amount of Substance Unit of Volume: Mole derived unit (Space or capacity) Liter, milliliter, cubic centimeter
Metric Unit of Volume 10 cm X 10 cm Liter Derived Unit
1000 ? 3 cm = 1 Liter Derived Unit
1000 m. L = 1 Liter ? milliliter = 1 Liter Derived Unit
1 m. L = 1 3 cm ? milliliter = 1 3 cm Derived Unit
1 kilogram What is the mass of 1 liter of pure H 2 O? Mass/Volume relationship
1 liter What is the volume of 1 kg of pure H 2 O? Mass/Volume relationship
1 gram What is the mass of 1 3 cm of pure H 2 O? Mass/Volume relationship
1 3 cm or 1 m. L What is the volume of 1 gram of pure H 2 O? Mass/Volume relationship
273 K Freezing Point of water in the Kelvin scale. Physical Constant
373 K Boiling Point of water in the Kelvin scale. Physical Constant
0 C Freezing Point of water in the centigrade scale. Physical Constant
100 C Boiling Point of water in the centigrade scale. Physical Constant
Another name for freezing point. Ice / water equilibrium
Another name for boiling point. Steam / water equilibrium
100 cm = 1 meter ? cm in 1 meter Conversion Fact
1000 mm = 1 meter ? mm in 1 meter Conversion Fact
1000 m = 1 kilometer ? m in 1 km Conversion Fact
1000 mg = 1 gram ? mg in 1 g Conversion Fact
Mass / Volume Density
Describes how matter is packed into space. Density
grams / cm 3 for solids grams / ml for liquids Units of Density
M D V Density
How close a measured value is to an accepted value. Accuracy
How close a series of measurements are to one another. Precision
Low Scatter High Precision
Measured value – Accepted value x 100% Accepted value Percent Error Table T, reference tables
A measure of the average kinetic energy of the particles of a system. Temperature
K = C + 273 C to K Table T, reference tables
The number is written as a product of 2 numbers: - a number between 1 & 10 - a power of 10 Scientific Notation
Negative exponent so the number is between 0 and 1: 0. 002 2 X -3 10
Positive exponent so the number is greater than 1: 500 5 X 2 10
3. 45 X The 1 st factor got smaller by a factor of 100. -17 10 So the 2 nd factor must increase by a factor of 100. Convert 345 X 10 -19 to scientific notation.
All known digits plus 1 estimated digit. Significant Figures From the perspective of the person MAKING the measurement.
Decimal Present – Pacific side Start counting at 1 st nonzero # and count until the end of the number. 5400. 145 cm 1 2 34 567 Interpreting someone else’s measurements. 7 sig figs
Decimal Present – Pacific side Start counting at 1 st nonzero # and count until the end of the number. 0. 0175 g 12 3 Interpreting someone else’s measurements. 3 sig figs
Decimal Absent – Atlantic side Start counting at 1 st nonzero # and count until the end of the number. 4855 g 4 321 4 sig figs
Decimal Absent – Atlantic side Start counting at 1 st nonzero # and count until the end of the number. 4000 mm 1 1 sig fig
Answer has same number of decimal places as the addend with the least number of decimal places. Rule for sig figs in Addition and Subtraction
77. 2 cm is correct! Least # of decimal places ! 28. 0 cm 23. 538 cm + 25. 68 cm 77. 218 cm But what do you report?
Answer has same number of significant figures as the factor with the least number of significant figures. Rule for sig figs in Multiplication & Division
78 m 2 is correct! 2 sig figs 3 sig figs 24 m X 3. 26 m = 78. 24 But what do you report? 2 m
a) 2. 749 g/cm 3 b) 2. 75 g/cm 3 c) 2. 7 g/cm 3 d) 0. 36 cm 3/g 3 sig figs An aluminum cube has a mass of 4. 75 grams. The dimensions of the cube are 1. 2 cm X 1. 2 cm. What is the density of the 2 sf cube? “Volume” = 1. 728 cm 3 “Volume” = 1. 728 cm
Final Volume = 46. 0 m. L Initial Volume = 40. 0 m. L Volume of rock = 6. 0 m. L Mass of rock = 54. 0 g Density of rock = 9. 0 g/m. L 2 sig figs – determined by the digits in the difference not by the raw data! Calculating density by water displacement.
Molar Mass of Na. Cl = 58. 5 grams. Calculated from P. T. 43. 875 g 1 mole 58. 5 grams = 0. 75000 moles/1. 0 Liter = 0. 75 M 2 sig fig 5 sig figs A solution contains 43. 875 grams of Na. Cl dissolved in 1. 0 Liter of H 2 O. What is the molarity expressed to the correct sig figs?
2 columns plus title independent variable – controlled by scientist (column 1) dependent variable – measured variable (column 2) Data Table
2 axes plus title independent variable – controlled by scientist (column 1) – GOES on X-AXIS dependent variable – measured variable (column 2) – GOES on Y-AXIS Graph
Y-axis Y = m. X + b X-axis Linear Relationship
Y-axis Y = m. X X-axis Direct Relationship
Y-axis XY = k where k is a constant X-axis Inverse Relationship
Y-axis X-axis Graph of a Constant
- Mass vs weight
- Anything that has mass and take up space
- Is anything that has mass and takes up space.
- Matter is anything that has mass and occupies space
- Matter is anything that has what
- Anything that takes up space
- Anything that takes up space and has mass is
- Anything that occupies space
- Matter is anything that?
- Matter is anything that has
- The matter is anything that occupies
- Matter is anything that has and takes up
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- Matter is defined as anything that
- Matter anything that
- Use of density
- Matter is anything that:
- What is matter
- No matter anything
- Matter is anything that
- No matter anything
- Matter anything that
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- Matter anything that
- Matter anything that
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- It is anything that has mass and occupies space
- Matter has mass and occupies space
- Anything that has mass and volume
- Earth has not anything to show more fair figure of speech
- Anthing that takes up space and has mass is called?
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- Classification of matter section 1 composition of matter
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