Physical Property Chemical Property Physical Change Chemical ...
Homework
Name ____________________________
Physical and Chemical Properties and Changes Working with Precision and Accuracy
Physical Property
Chemical Property
Observed with senses Determined without altering the chemical identity of the substance
Indicates how a substance reacts with something else The substance will be changed into a new substance(s) after the reaction
A) Identify the following as a chemical or physical property 1. _________________ Paper will burn at 4510F 2. _________________
Sugar is soluble in water.
3. _________________
Most metals react with acid to produce hydrogen gas.
Physical Change
Chemical Change
A change in appearance such size, shape or state No new substance is formed
A change in the physical AND chemical properties A new substance is formed
B) Identify the following as chemical or physical changes 1. ________________
Chocolate syrup is dissolved in milk.
2. ________________
A straight piece of wire is coiled to form a spring.
3. ________________
A wet knife is left out and reddish brown spots appear on it.
4. ________________
Bread made with baking soda rises when baked.
C) Determine if the Following Statements are True or False 1. When ice cream melts, a chemical change occurs.
_____________
2. Acid rain damaging a marble statue is a physical change
_____________
3. In a physical change, the makeup of matter is changed
_____________
Precision and Accuracy
#1 On the following Graduated Cylinders please draw a line for the value given.
#2 On the following targets please evaluate the marks for accuracy and precision
# 3 Answer the following multiple choice question for accuracy and precision A student performed an analysis of a sample for its calcium content and got the following results: 14.92% 14.91% 14.88% 14.91% The actual amount of calcium in the sample is 14.90%. What conclusions can you draw about the accuracy and precision of these results? A)
While precise, these results are not accurate.
B)
While accurate, these results are not accurate.
C)
These results are both accurate and precise.
D)
These results are neither accurate nor precise.
Significant Figures #1 Scientific Notation Express the following values in scientific notation A) The human eye blinks an average 4,2000,000 times a year. _____________________________
B) A plant cell is approximately 0.00001276 meters wide. _____________________________
#2 Significant Figures in Data and Calculations Complete the following calculations. Express your answer with the correct number of significant figures and units. A) 2.11 x 10 3 joules divided by 34 seconds. ___________________________
B) 349 cm + 1.10 cm + 100 cm = _________________________
C) 450 meters divide by 114 seconds = _________________________
Name ____________________________
Physical and Chemical Properties and Changes Working with Precision and Accuracy
Physical Property
Chemical Property
Observed with senses Determined without altering the chemical identity of the substance
Indicates how a substance reacts with something else The substance will be changed into a new substance(s) after the reaction
A) Identify the following as a chemical or physical property 1. _________________ Paper will burn at 4510F 2. _________________
Sugar is soluble in water.
3. _________________
Most metals react with acid to produce hydrogen gas.
Physical Change
Chemical Change
A change in appearance such size, shape or state No new substance is formed
A change in the physical AND chemical properties A new substance is formed
B) Identify the following as chemical or physical changes 1. ________________
Chocolate syrup is dissolved in milk.
2. ________________
A straight piece of wire is coiled to form a spring.
3. ________________
A wet knife is left out and reddish brown spots appear on it.
4. ________________
Bread made with baking soda rises when baked.
C) Determine if the Following Statements are True or False 1. When ice cream melts, a chemical change occurs.
_____________
2. Acid rain damaging a marble statue is a physical change
_____________
3. In a physical change, the makeup of matter is changed
_____________
Precision and Accuracy
#1 On the following Graduated Cylinders please draw a line for the value given.
#2 On the following targets please evaluate the marks for accuracy and precision
# 3 Answer the following multiple choice question for accuracy and precision A student performed an analysis of a sample for its calcium content and got the following results: 14.92% 14.91% 14.88% 14.91% The actual amount of calcium in the sample is 14.90%. What conclusions can you draw about the accuracy and precision of these results? A)
While precise, these results are not accurate.
B)
While accurate, these results are not accurate.
C)
These results are both accurate and precise.
D)
These results are neither accurate nor precise.
Significant Figures #1 Scientific Notation Express the following values in scientific notation A) The human eye blinks an average 4,2000,000 times a year. _____________________________
B) A plant cell is approximately 0.00001276 meters wide. _____________________________
#2 Significant Figures in Data and Calculations Complete the following calculations. Express your answer with the correct number of significant figures and units. A) 2.11 x 10 3 joules divided by 34 seconds. ___________________________
B) 349 cm + 1.10 cm + 100 cm = _________________________
C) 450 meters divide by 114 seconds = _________________________
