Q1T2: Electromagnetic Spectrum and Heat

Question 1

What colors, and in what order, make up the visible light?

Answer 1

Red, orange, yellow, green, blue, indigo, violet

Question 2

What are the different waves in order from lowest frequency to highest?

Answer 2

Radio, microwaves, infrared, visible light, UV rays, X-rays, and Gamma rays

Question 3

If a wave has a low frequency, then it has a _____ wavelength.

Answer 3

longer

Question 4

If a wave has a _____ frequency, then it has a shorter wavelength.

Answer 4

higher

Question 5

Microwaves have a ___ frequency than UV rays

Answer 5

lower

Question 6

Sunscreen is a lotion used to protect skin from exposure to the Sun. This sunscreen protects a person’s skin from wavelengths that are

a. longer than radio waves but shorter than x-rays
b. longer than x-rays but shorter than infrared waves
c. longer than microwaves but shorter than infrared waves
d. longer than visible light waves but shorter than radio waves.

Answer 6

b. longer than x-rays but shorter than infrared waves

Question 7

Which electromagnetic wave type has the shortest wavelengths and highest frequencies?

Answer 7

gamma rays

Question 8

which of the following contributes to the production of electromagnetic waves?

a. stationary charged particles
b. changing magnetic fields
c. a constant called magnetic field

Answer 8

b. changing magnetic fields

Question 9

Electromagnetic waves you can see are

Answer 9

visible light

Question 10

which three colors combine to form a white light, like those used in classroom fluorescent light bulbs?

Answer 10

blue, green, and red

Question 11

which of the following tools can be used to separate different visible light wavelengths from each other for visualizing?

a. microscope
b. telescope
c. spectroscope
d. periscope

Answer 11

c. spectroscope

Question 12

How does the Earth become heated?

a. electromagnetic waves are radiated from the Sun to the Earth
b. electromagnetic waves are conducted from the Earth to the Sun
c. Electromagnetic waves, including infrared, through conduction from the Sun to the Earth
d. Thermal energy is released from the Earth causing convection by the Sun

Answer 12

a. electromagnetic waves are radiated from the Sun to the Earth

Question 13

total energy of all particles in a substance

Answer 13

heat

Question 14

joules or calories

Answer 14

units that are used for heat

Question 15

amount of heat to raise 1g of a substance by 1degree Celsius

Answer 15

specific heat capacity

Question 16

average kinetic energy of a substance

Answer 16

temperature

Question 17

the effect when infrared and visible light waves strike the earth and are reflected off of the Earth’s surface, then reflected off of the ozone and keeps the Earth warm

Answer 17

greenhouse effect

Question 18

heat can be transferred in all of the following ways except

a. conduction
b. radiation
c. convection
d. transmutation

Answer 18

d. transmutation

Question 19

heat always moves from _____ objects to ____ objects

Answer 19

warmer, cooler

Question 20

heat is the transfer of ____ between substances of different temperatures

Answer 20

energy

Question 21

This is a material that transfers heat energy easily

Answer 21

conductor

Question 22

If three containers, A, B, and C, are lined up touching each other and each one contains 100mL of water at different temperatures; A is at 45C, B is at 60C, and C is at 80C, how will the heat flow?

Answer 22

heat flows from C to B to A and to the surroundings

Question 23

which of the following materials would be more likely to reflect radiant energy?

a. light colored materials
b. dull materials
c. dark colored materials
d. transparent materials

Answer 23

a. light colored materials

Question 24

which of the following are usually the best conductors of heat?

a. gases
b. metals
c. plastics
d. liquids

Answer 24

b. metals

Question 25

why does the liquid in a thermometer rise on a hot day and drop on a cold day?

a. on a hot day, the particles in the liquid move fast and take up more space. on a cold day, the particles in the liquid move slowly and take up less space.
b. on a hot day, the particles in the liquid move slow and take up less space. on a cold day, the particles in the liquid move fast and take up more space
c. on a hot day, the particles in the liquid move slow and take up less space. on a cold day, the particles in the liquid don’t move and take no space.

Answer 25

a. on a hot day, the particles in the liquid move fast and take up more space. on a cold day, the particles in the liquid move slowly and take up less space

Question 26

the lowest limit of temperature is called

Answer 26

absolute zero

Question 27

what happens to molecules at absolute zero?

Answer 27

they do not move

Question 28

t/f

Kelvin, Celsius, Rankine, and Fahrenheit are all measures of temperature.

Answer 28

true

Question 29

you receive a text message from your lab partner during vacation. She texts you the following message:
“Having a gr8 time! it is 85 here, and swimming every day. L8r.”
Which of the following statements is correct regarding the content of the text referring to the number 85?
a. she is referring to the heat, measured in Celsius
b. she is referring to the heat, measured in Fahrenheit
c. she is referring to the temperature, measured in Celsius
d. she is referring to the temperature, measure in Fahrenheit

Answer 29

d.she is referring to the temperature, measure in Fahrenheit

Question 30

which has a greater thermal energy, a cup of 50C water, or a bathtub of 50C water?

Answer 30

the bathtub, since there are many more molecules, and thermal energy measures the total energy of the particles present

Question 31

what is the correct formula for calculating the amount of heat or thermal energy involved in a reaction?

Answer 31

Q=mcΔt

Question 32

Substance A has a higher specific heat than substance B. With all other factors equal, which requires the most energy to heat equal masses of A and B to the same temperature?

Answer 32

Substance A

Question 33

How much heat energy (in Joules) is needed to raise the temperature of a 5g aluminum baking sheet from room temperature, 25C, to a baking temperature of 100C? (the specific heat of aluminum is 0.897 J/g x C )

Answer 33

336.375 J

Question 34

How much energy is needed to heat 1g of sand, which has a specific heat of 0.664 J/(g*C) from 30C to 50 C?

Answer 34

13.280 J

Question 35

a glass of water has a temperature of 70C. What is its temperature in Kelvin?

Answer 35

343K

Question 36

Aluminum has a specific heat capacity of 897
Concrete has a specific heat capacity of 850
Diamond has a specific heat capacity of 509
Glass has a specific heat capacity of 840
Helium has a specific heat capacity of 5193
Water has a specific heat capacity of 4181
Which of the above materials needs the least amount of thermal energy to heat up?

Answer 36

diamond

Question 37

Aluminum has a specific heat capacity of 897
Concrete has a specific heat capacity of 850
Diamond has a specific heat capacity of 509
Glass has a specific heat capacity of 840
Helium has a specific heat capacity of 5193
Water has a specific heat capacity of 4181
which of the above materials needs the most amount of thermal energy to heat up?

Answer 37

helium

Question 38

The delta T, or ΔT, is equal to

Answer 38

Tf-Ti