Which of the following identifies a measurement, its SI units, 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.