## Sunday, 17 August 2014

### PHYSICS AND MEASUREMENT QUESTIONS

PHYSICS AND MEASUREMENT

I.Select the correct term to complete the sentences.
experiment
dependent
speed
time interval
metric system
length
natural laws
English system
mass
seconds
hypothesis
constant speed
atomic
1. It is believed all events in nature obey a set of ____ that do not
change.
2. _____ is the measure of the amount of matter in an object.
3. A(n) ____ can help you understand the natural laws that relate matter
and energy.
4. When you formulate a(n) ____, you make an educated guess or
prediction that can be tested by an experiment.
5. ____ properties are too small to be directly observed.
6. The ____ variable goes with the y-axis of a graph.
7. Distance is measured in units of ____.
8. A quantity of time is known as a(n) ____.
9. The ____ uses length measurements of millimeters, centimeters,
meters, and kilometers.
10. In physics, time is usually measured in units of ____.
11. The ____ uses length measurements of inches, feet, yards and miles.
12. ____ is the distance traveled divided by the time taken.
13. A car traveling the same distance every second is moving at ____.
CONCEPT BASED QUESTIONS :
1. List and define the two categories we use to classify everything in the
universe.
2. How have physicists come to understand the natural laws?
3. What property does matter have that energy does not?
4. Is light matter? Why or why not?
5. Define the term system as it relates to experiments.
6. When designing an experiment, how do you choose the system to
investigate?
7. Explain the main difference between the macroscopic scale and the
atomic scale.
8. List the steps of the scientific method.
9. A hypothesis is a random guess. True or false? Explain your answer.
10. What do you call variables that are kept the same in an experiment?
11. Why is it important to only change one experimental variable at a
time in an experiment?
12. You wish to do an experiment to determine how a ball’s radius affects
how fast it rolls down a ramp. List the independent and dependent
variables in this experiment.
13. Explain the role of energy in a system that is changing.
14. Why are units important when measuring quantities?
15. State whether you would measure each quantity in kilometers, meters,
centimeters, or millimeters.
a. The length of a car
b. A single grain of rice
c. The thickness of your textbook
d. The distance from your house to school
16. Why is it important to understand both English and metric units?
17. Give an example of a quantity that is often measured in metric units
and a quantity that is often measured in English units.
18. What are the two different meanings of the word time?
19. Summarize how to make a graph by listing the steps you would
follow.
20. You wish to make a graph of the height of the moon above the
horizon every 15 minutes between 9:00 p.m. and 3:00 am during one
night.
a. What is the independent variable?
b. What is the dependent variable?
c. On which axis should you graph each variable?
21. Write the form of the speed equation that you would use in each of the
following scenarios. Let v = speed, t = time, and d = distance:
a. You know distance and speed and want to find the time.
b. You know time and distance and want to find the speed.
c. You know speed and time and want to find the distance.
22. What is the speed of an object that is standing still?
23. Your friend rides her bicycle across town at a constant speed.
Describe how you could determine her speed.