Physical Science and Inquiry: Sci. 8.2d.-8.2e
1. Which has the most energy?
a. Infrared wave
b. X-ray
c. Microwave
d. Visible light
.
2. How are gamma rays most likely used in the food industry?
A. Gamma rays are in the range we call visible light; therefore, gamma rays give food color.
B. Gamma rays are the longest waves in the electromagnetic spectrum, so they are used in
microwave ovens to cook food quickly.
C. Gamma rays are the shortest waves in the electromagnetic spectrum and can be used to kill
bacteria that might spoil food.
D. Gamma rays are the longest waves in the electromagnetic spectrum; therefore, they are used to
grow food crops quickly.
.
Look at the diagram below, which shows the electromagnetic spectrum.
3. Which of the following DOES NOT use Infrared Radiation?
A. Cell phone signals
B. Human body heat
C. Heat lamps
D. Night-vision goggles
4.
Physical Science and Inquiry
.
Use the diagram of the circuits to answer the following question.
5. Which of the following statements is true?
A. Circuit B represents how most homes are wired.
B. Circuit A represents how a doorbell is wired.
C. Circuit A represents how a light switch is wired.
D. Circuit B represents how Christmas tree lights are wired.
Wind turbines are gradually making their way into the Gulf Coast regions, including
Mississippi. Customers on the grid system have been installing wind turbines for
various uses. One subdivision in Mississippi added a wind turbine to power all of the
street lights in the neighborhood.
6. What path does electricity take from wind turbines to homes and businesses in
Mississippi?
A. turbine → generator → power lines → streetlights
B. generator → turbine → power lines → streetlights
C. turbine → power lines → generator → streetlights
D. generator → power lines → turbine → streetlights
.
7.
8. A student is describing how resistant a wire is to electrons flowing through it. What are the units
of his measurement?
A. Volts (V)
B. Amperes (A)
V
C. Voltamps (A)
D. Ohms (Ω)
9. Which of these equations illustrates Ohm’s Law?
A.
B.
C.
D.
V
I=
R
I = VR
I
R=V
R = IV
10. According to Ohm’s Law, what will happen to the current in a wire if the resistance is
decreased?
A.
B.
C.
D.
The
The
The
The
current
current
current
current
will
will
will
will
decrease.
increase.
decrease but only if the temperature changes.
increase but only if the temperature changes.
11. A wire has a current of 20 amps passing through it. If the wire has a resistance of 5Ω,
what is the voltage of the wire? You must include units.
12. The electrical engineer’s design for the circuit to run his Geiger counter is shown at the right.
Which of these describes the circuit?
A. All of the resistors in the circuit are setup in
series.
B. All of the resistors in the circuit are setup in
parallel.
C. Resistors 2 and 3 are in series but resistors 1 and
2 as well as 1 and 3 are in parallel.
D. Resistors 2 and 3 are in parallel but resistors 1
and 2 as well as 1 and 3 are in series.
13.