Wh, rectangular piece of glass called a slide. You must
handle slides gently to avoid breaking them.
Lesson 2 Review
Use Vocabulary
1 Define description and explanation in
your own words.
2 Use the term International System of Units
(SI) in a sentence.
Understand Key Concepts
3 Which tool would a scientist use to
view a tiny organism?
A. computer
C. test tube
B. compound D. triple-beam
microscope
balance
4 Describe the difference between
accuracy and precision.
5 Explain why scientists use significant
digits.
NOS. 18 Scientific Explanations