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General Biology: Metric System and Measurement lab 1

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Termini in questo insieme (25)

  • What are the common SI base units used in biology?

    Length: meter (m), Mass: gram (g), Volume: liter (L), Time: seconds (s), Temperature: degree Celsius (°C).

  • Why is the metric system preferred over the imperial system in science?

    The metric system is decimal-based, making unit conversions simple by powers of ten, reducing errors and ensuring universal understanding.

  • What is the mnemonic to remember metric prefixes from kilo to micro?

    King Henry Does Usually Drink Chocolate Milk Mondays: Kilo-, Hecto-, Deca-, Base units, Deci-, Centi-, Milli-, Micro-.

  • How do you convert from a smaller metric unit to a larger one?

    Move the decimal point to the left for each step, dividing by 10 each time.

  • How do you convert from a larger metric unit to a smaller one?

    Move the decimal point to the right for each step, multiplying by 10 each time.

  • What is the value of 1 kilometer in meters?

    1 kilometer (km) = 1,000 meters (m).

  • How many millimeters are in one centimeter?

    10 millimeters (mm) = 1 centimeter (cm).

  • What is the correct way to read liquid volume in a graduated cylinder?

    Read the volume at the bottom of the meniscus at eye level.

  • What is the formula for density?

    Density = mass / volume.

  • What does high density indicate about an object's mass and volume?

    High density means a lot of mass is packed into a small volume.

  • What is the difference between accuracy and precision?

    Accuracy is how close a measurement is to the true value; Precision is the reproducibility or closeness of repeated measurements.

  • How do you tare a scale?

    Place the empty container on the scale and press the tare or zero button to reset the display to zero.

  • Why is it important to include units when recording measurements?

    Units provide context and meaning to numerical values, ensuring clear communication and reproducibility.

  • How many microliters are in one milliliter?

    1 milliliter (mL) = 1,000 microliters (µL).

  • How many grams are in one kilogram?

    1 kilogram (kg) = 1,000 grams (g).

  • What is the mass of 1 milligram in micrograms?

    1 milligram (mg) = 1,000 micrograms (µg).

  • How do you determine the number of steps to move the decimal point in metric conversions?

    Count the number of prefix steps between the units on the metric prefix chart.

  • What is the density of water in g/mL?

    Approximately 1 g/mL.

  • Why does oil float on water?

    Oil has a lower density than water, so it floats on the surface.

  • How many centimeters are in one meter?

    1 meter (m) = 100 centimeters (cm).

  • What is the smallest division on a metric ruler between centimeters?

    One millimeter (mm), which is 1/10th of a centimeter.

  • What is the scientific notation for micro-?

    Micro- = 10-6.

  • What equipment is used to measure mass in grams?

    Electronic balances or gram balances.

  • What is the volume range for serological pipettes used in this lab?

    0.1 mL to 10 mL, with some up to 50 mL.

  • How do you calculate the mass of oil in a container?

    Subtract the mass of the empty container from the mass of the container plus oil.