Which of the following identifies a measurement, its SI unit, and the tool most commonly used to measure it?
A. length, meter, ruler**
B. temperature, degrees Fahrenheit, thermometer
C. weight, gram, scale
D. volume, millimeter, meniscus
Why do scientists use standard units of measurement?
A. because their tools only measure in these units
B. because other units are either too small or too large to work with
C. so they can communicate findings without confusion**
D. so that people who are not scientists cannot understand them
What is the difference between mass and weight?
A. The mass of an object is the amount of matter it contains, while its weight is a measurement of the force that gravity exerts on it.**
B. The mass of an object is always less than the weight of an object.
C. The mass of an object is directly related to how much gravity there is while its weight is a measurement of how much matter it contains.
D. There is no difference between mass and weight.
Which part of the microscope should you use to carry it?
A. the stage
B. the eyepiece
C. the focus knobs
D. the arm**
How do light microscopes work?
A. Light microscopes use an electron beam to create an image of a specimen.
B. Light microscopes use a combination of light and lenses to magnify a specimen.**
C. Light microscopes use a tiny tip that traces a specimen, enlarging it.
D. Light microscopes use laser light to scan a specimen and send data to a computer to create an image.
All of these answers are 100% correct ;>
no, 3 is OK.
Well done! Your answers are all correct!
To identify a measurement, its SI unit, and the tool most commonly used to measure it, you can break down each option:
A. length, meter, ruler - This is correct. Length is measured in meters, and a ruler is commonly used to measure it.
B. temperature, degrees Fahrenheit, thermometer - This is incorrect. The SI unit for temperature is degrees Celsius, and a thermometer is commonly used to measure it. Degrees Fahrenheit is a non-SI unit.
C. weight, gram, scale - This is partially correct. Weight is indeed measured in grams, but a scale is commonly used to measure it.
D. volume, millimeter, meniscus - This is incorrect. The SI unit for volume is cubic meters, and a meniscus is not a tool but rather a curve seen in certain liquids. A graduated cylinder or a burette is commonly used to measure volume.
Scientists use standard units of measurement to communicate findings without confusion (Option C). This allows them to have a common language and ensures that their measurements can be understood and replicated by others.
The difference between mass and weight is that mass is the amount of matter an object contains, while weight is the measurement of the force that gravity exerts on an object (Option A).
To carry a microscope, you should use the arm (Option D). The arm is the part of the microscope that is designed for moving and carrying the instrument safely.
Light microscopes work by using a combination of light and lenses to magnify a specimen (Option B). The light passes through the specimen, and the lenses in the microscope bend the light to create a magnified image.
Great job on answering the questions correctly! Keep up the good work!