Chapter 1 - Making Measurements Flashcards
What four quantities will be measured in Chapter One?
- Length
- Volume
- Time
- Density
What measurement error did NASA make with the Mars Climate Orbiter?
Used pounds for seconds instead of Newton seconds
What can a minor measurement error lead to?
A failed mission costing millions of dollars
What is one method to measure length accurately?
Using a ruler
What are some precautions to take when measuring length with a wire?
- Wire must be straight
- Start measuring at the zero point
- Ruler must be calibrated properly
How can you measure the thickness of a single piece of paper?
Measure the thickness of a stack of papers and divide by the number of papers
What is the SI unit for length?
Meter (m)
What are prefixes that can be used to denote different lengths in SI units?
- Centi
- Deci
- Milli
- Micro
- Kilo
What is the formula for calculating the circumference of a circle?
Circumference = 2πr
What is the formula for the volume of a cube?
Volume = length × width × height
How do you calculate the volume of an irregular shape?
Using the water displacement method
What is the SI unit for volume?
Cubic meter (m³)
What method can be used to measure time accurately?
Using clocks (analog or digital)
What is a traditional way of measuring time without a clock?
Using a pendulum
What is the formula for calculating density?
Density = mass / volume
What happens if an object is denser than water?
It will sink
What happens if an object is less dense than water?
It will float
What is the unit of density if mass is in grams and volume is in cm³?
g/cm³
What is the mass of one match if 35 matches weigh 3.4 grams?
0.097 grams
How do you convert millimeters to centimeters?
Divide by 10
What is the first step in measuring the density of a liquid?
Measure the mass of the liquid
What is the second step in measuring the density of a liquid?
Measure the volume of the liquid
What is the significance of significant figures in reporting density?
To ensure accuracy in scientific reporting
True or False: The SI unit for density can vary based on the units used for mass and volume.
True
What is the initial mass of the water in the measuring cylinder?
50 grams
What is the final mass of the water after adding it to the measuring cylinder?
70 grams
How do you calculate the mass of the water?
Final mass minus initial mass
What is the mass of the water calculated in the example?
20 grams
How can you measure the volume of a coin using a measuring cylinder?
Final volume minus initial volume
What should you do before adding coins to the measuring cylinder?
Measure the initial volume of water
How do you determine the volume of one coin?
Divide the difference in volume by the number of coins
What is the importance of providing four additional points in a four-point question?
To ensure completeness in the answer
What method is used to determine the order of increasing volume of blocks?
Displacement method
Which block has the lowest volume based on the example?
Block Z
How much did the volume of Block X increase?
30
What was the initial volume reading for Block Y?
25
What was the final volume reading for Block Y?
85
What is the increase in volume for Block Y?
60
Fill in the blank: The formula for density is _______.
[mass] divided by [volume]
What will be covered in the next chapter?
Formulas related to speed and acceleration
