Chapter 5

Question 1

Power

Answer 1

The rate of energy usage

Question 2

Watt

Answer 2

A unit of power equal to the work done at the rate of one joule per second

Question 3

Diffraction Grating

Answer 3

A finely etched surface that can split light into a spectrum

Question 4

Emission

Answer 4

The process by which matter emits energy in the form of light

Question 5

Absorption

Answer 5

The process by which matter absorbs radiative energy

Question 6

Transmission

Answer 6

The process in which light passes through matter without being absorbed

Question 7

Reflection/Scattering

Answer 7

Process that changes the direction of light

Question 8

Wavelength

Answer 8

The distance between adjacent peaks/troughs

Question 9

Frequency

Answer 9

Number of peaks passing by any point each second

Question 10

Cycles per second

Answer 10

Units of frequency for a wave

Question 11

Speed (w formula)

Answer 11

wavelength x frequency = speed

Question 12

Electromagnetic Wave

Answer 12

Synonym for light

Question 13

Speed of Light

Answer 13

300,000 km/s

Question 14

Photons

Answer 14

An individual particle of light characterized by wavelength and frequency

Question 15

Radiate

Answer 15

To spread from the center

Question 16

Particle Radiation

Answer 16

Energy carried by particles of matter

Question 17

Electromagnetic Spectrum

Answer 17

The complete spectrum of light

Question 18

Electromagnetic Radiation

Answer 18

Another name for light of all types

Question 19

Visible Light

Answer 19

Light that we can see with our bare eyes

Question 20

Infrared

Answer 20

Light with the wavelengths that fall in the portion of the electromagnetic spectrum between radio and visible

Question 21

Radio Waves

Answer 21

Light with very long wavelengths, longer than infrared

Question 22

Microwaves

Answer 22

Light with wavelengths longer than those with infrared light

Question 23

Ultraviolet

Answer 23

Light with wavelengths that fall in the portion of the electromagnetic spectrum between visible light and X-Rays

Question 24

Gamma Rays

Answer 24

Light with very short wavelengths and higher frequencies
Shorter than X-Rays

Question 25

Atoms

Answer 25

The basic units of the chemical elements consisting of a nucleus surrounded by a cloud of electrons

Question 26

Element

Answer 26

A substance made from individual atoms of a particular atomic number

Question 27

Protons

Answer 27

Particles with positive electrical charge

Question 28

Neutrons

Answer 28

Particles with no electrical charge

Question 29

Electrons

Answer 29

Fundamental particles with negative electrical charge

Question 30

Nucleus

Answer 30

The center of an atom made from protons and neutrons

Question 31

Electric Charge

Answer 31

A fundamental property of matter that is described by it's amount and is either positive/negative

Question 32

Atomic Number

Answer 32

The number of protons in an atom

Question 33

Isotopes

Answer 33

Forms of an element that have the same number of protons but different number of electrons

Question 34

Molecules

Answer 34

The smallest unit of chemical elements or compound

Question 35

Solid

Answer 35

Atoms/molecules are hard and rigidly in place

Question 36

Liquid

Answer 36

Atoms/molecules are held together but move relatively freely

Question 37

Gas

Answer 37

Atoms/molecules can move essentially independently of one another

Question 38

Chemical Bond

Answer 38

Interactions between electrons that hold the atoms and molecules together

Question 39

Molecular Disassociation

Answer 39

The process by which a molecule splits into it's component parts

Question 40

Ions

Answer 40

Atoms with positive/negative electrical charge

Question 41

Ionization

Answer 41

The process of stripping one/more electrons from an atom

Question 42

Plasma

Answer 42

A state of matter along with solids, liquids, and gases.

Question 43

Pressure

Answer 43

The force (per unit area) pushing on an object

Question 44

Energy

Answer 44

What can make matter move

Question 45

Energy Level Transitions

Answer 45

An electron can rise from a low energy to a higher level of energy / higher level to a lower one

Question 46

Spectroscopy

Answer 46

The process of obtaining spectra from astronomical objects

Question 47

Intensity

Answer 47

A measure of the amount of energy coming from light