# INTRO. UNIT STUDY GUIDE- test 11/13/15 ```INTRO. UNIT STUDY GUIDE- test 11/13/15
For the test, you should be able to: (Check off each item you have mastered.)
 Demonstrate knowledge of safe laboratory rules and procedures.
 Demonstrate how to use various instruments to make accurate measurements.
 Apply correct units to all measurements.
 Calculate the volume of a regular solid.
 Calculate the volume of an irregular object, using water displacement.
 Calculate density, given an object’s mass and volume.
 Manipulate the density formula
 Know the density of water and why objects float or sink when placed in water.
 Be able to state a problem, a hypothesis and steps of the scientific method.
 Explain the difference between an independent and dependent variable and be able to identify them.
 Determine the constants in an experiment.
 Identify the elements of a good graph.
 Be able to make a conclusion after analyzing data.
 Calculate protons, electrons and neutrons
 Identify the difference between physical and chemical properties and changes
For the ice/salt water lab:
1. What was the independent variable? ___________________________________________________
2. What was the dependent variable?
3. What was the control?
___________________________________________________
____________________________________________________
WORD BANK:
balance
chemicals
chemical
constants
fire
glass
hypothesis
inference
one
physical
problem
qualitative
quantitative
4. To state the _________________________________________________ is to ask a question.
5. A _____________________________________________________________ is a testable statement.
6. __________________________________________________ are all the things that need to stay the same
during the experiment.
7. In an experiment, you can only have _______________________________ variable.
8. A _______________________________________________ observation is one you make with your 5 senses.
9. Measurements taken in lab are an example of ______________________________________ observations.
10. An ________________________________________________________ is an interpretation based on your knowledge
and observations.
11. A _________________________________________________is used to measure mass.
12. A _________________________________________________ is used to measure volume.
13. Goggles are worn in the lab when working with ____________________________________________,
______________________________________________________ and ____________________________________________.
14. Burning paper is a ______________________________________________ change.
15. Ice melting is a __________________________________________________ change.
Circle
C
the independent variable and Underline the dependent variable for #19.
19. The higher the hikers climb in altitude, the less oxygen there is to breathe.
20. What is the formula to calculate density? D =
21. Using the following information, find the density: (show your work)
Mass: 30 g
Volume: 15 mL
22. If an object’s density is higher than water’s, it will
float
or
sink
in water.
23. If an object’s density is lower than water’s, it will
float
or
sink
in water.
24. What is the measurement for:
25. What is the measurement of the apple in:
_____________________________
26. What is the measurement for the key: _____________________________ (don’t forget your units)
27.
What
is
the
mass:
_____________________________
(don’t
forget
your
units)
28. Convert the following measurements:
204.6 cm = ___________ km
58.26 dg = ____________ mg
6284.25 hL = ____________L
29. Put the scientific method in the correct order (1-7):
_____Collection of data
_____Problem
_____Materials
_____Procedure
30. List 4 of lab safety rules and 4 unsafe safe behaviors.
_____Hypothesis
_____Analysis
_____Conclusion
31. Identify if the following is physical or chemical change. Then explain why.
RustWhy?
Nail polishWhy?
TarnishWhy?
FlammabilityWhy?
Element Name
Element
symbol
Fluorine
Mn
Sodium
Atomic #
Atomic
Mass
Number of
Protons
Number of
Neutrons
Number of Electrons
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