Concepts in Science Exam 2

Question 1

Wavelength

Answer 1

the distance between crests, or the highest points of adjacent waves

Question 2

Frequency

Answer 2

number of wave crests that go by in a given second

Question 3

Period

Answer 3

the time between adjacent waves

Question 4

Velocity

Answer 4

speed and direction of the wave crest

Question 5

Amplitude

Answer 5

height of wave crest

Question 6

Radio waves

Answer 6

ranges from longest waves, to waves only a few meters longs

Question 7

Microwaves

Answer 7

waves that range in length from 1 meter to 1 millimeter

Question 8

Doppler Effect

Answer 8

The effect defines the change in frequency of a wavelength relative to the observer

Question 9

Molecule

Answer 9

Two or more atoms bonded together

Question 10

Atom

Answer 10

particles that make up the universe

Question 11

Elements

Answer 11

Substances that can’t be broken down into other materials

Question 12

Electron

Answer 12

Particle within an atom that carries a negative electrical charge

Question 13

Nucleus

Answer 13

Center particle of an atom, contains protons and neutrons

Question 14

Photon

Answer 14

Particle-like bundle of light

Question 15

Spectrum

Answer 15

Total collection of photons emitted by an atom

Question 16

Chemical bond

Answer 16

The link between two atoms

Question 17

Ionic bond

Answer 17

bond where two ions hold the atoms together

Question 18

Covalent bond

Answer 18

bond where atoms share electrons

Question 19

Hydrogen bond

Answer 19

bond where a hydrogen atom links with another atom via covalent bond

Question 20

Gas

Answer 20

state of matter where molecules expand and fill the available volume of its container

Question 21

Liquid

Answer 21

Molecules that maintain their volume but has no fixed shape

Question 22

Solid

Answer 22

Molecules that maintain their volume and have a fixed shape

Question 23

Plasma

Answer 23

High temperature environments (i.e. the surface of the sun) can strip electrons off of atoms creating plasma

Question 24

Mass number

Answer 24

Number on the periodic table that describes the mass of an element

Question 25

Neutron

Answer 25

neutrally charged particle within the nucleus of an atom

Question 26

Proton

Answer 26

positively charged particle within the nucleus of an atom

Question 27

Isotopes

Answer 27

Atoms of the same elements that possess different masses and varying numbers of neutrons