Vocabulary
Standard
What is an exact quantity that people agree to use to compare measurements?
Which of the following is an example of an SI unit?
A) Foot
B) Second
C) Pound
D) Gallon
Identify three technological items that you value that might not be important in a developing country.
Make the following conversion. 1,500 mL to L
1.5 L
Graph
What is a visual display of data?
Volume
What is the amount of space occupied by an object?
One one-thousandth is expressed by which prefix?
A)Kilo-
B)Nano-
C)Centi-
D)Milli-
Identify when bias occurs in scientific experimentation. Describe steps scientists can take to reduce bias and validate their experimental data.
Bias occurs when a scientist's expectations about the experiment change how he or she views the results. Running multiple trials, keeping accurate records of measurable data, peer review, and designing experiments that can be repeated reduces bias and helps validate data.
Make the following conversion. 2 km to cm
200,000 cm
Experiment
What is a test set up under controlled conditions?
Technology
What is the application of science to help people?
On which of the following is SI based?
A) Inches
B) Powers of five
C) English units
D) Powers of 10
Describe - Not all objects have a volume that is measured easily. if you were to determine that mass, volume, and density of your textbook, a container of milk, and an air-filled balloon describe how you would do it?
Textbook volume could be determined by multiplying the book's length, width, and height. The volume of the balloon could be determined by measuring the volume of water it displaces. The volume of any irregular object, such as the milk carton, must be determined indirectly. if the object is not harmed by water, volume can be measured by water displacement.
Make the following conversion. 5.8 dg to mg
580 mg
Control
What is a variable that does NOT change as another variable changes?
Mass
What is the amount of matter in an object?
What is the symbol for deciliter?
A) dL
B) dcL
C) dkL
D) Ld
Suppose you set a glass of water in direct sunlight for 2 hours and measure its temperature every 10 min. What type of graph would you use to display your data? What would be the dependent variable be? What would the independent variable be?
A line graph; time would be the independent variable and temperature would be the dependent variable.
Make the following conversion. 22 degrees C to K
295 K
Density
What is the mass per unit volume?
Dependent Variable
What is a variable that changes as another variable changes?
Which of the following is NOT a derived unit?
A) dm3
B) m
C) cm3
D) g/ml
A metal sphere is found to have a density of 5.2 g/cm3 at 25 degrees C and a density of 5.1 g/cm3 at 50 degrees C. Form a hypothesis to explain this observation. How could you test your hypothesis?
The metal likely expands when heated. The hypothesis can be tested by measuring the volume of the sphere at the two temperatures.
Calculate the density of an object having a mass of 17 g and a volume of 3 cm3.
D=m/v
m=17 g
v=3 cm3
D=17 g/3 cm3 = 5.7 g/3 cm3
Hypothesis
What is an educated guess using what you know and observe?