sci a

Question 1

is defined as the transfer of
energy from a vibrating object in waves
that travel through matter.

Answer 1

Sound

Question 2

All sound waves begin with ______?

Answer 2

vibrating
matter

Question 3

You’ll often see the speed of sound given as

Answer 3

343 meters per second

Question 4

speed of sound under a
certain set of conditions, specifically, through _____

Answer 4

dry air at 20 °C

Question 5

The speed of sound may be very different
through other matter or at other temperatures.

Answer 5

True

Question 6

The speed of sound does not depend on the temperature of the medium.

Answer 6

False

Question 7

sound has a slower speed at _______?

Answer 7

Lower temperatures

Question 8

At a lower temperature, particles of the medium are moving more

Answer 8

slower

Question 8

At a lower temperature, particles of the medium are moving more

Answer 8

slower

Question 9

is a sound that is repeated
because the sound waves ae reflected
back.

Answer 9

echo

Question 10

Although the direction of the sound
changes, the echo sounds the same as
the original sound.

Answer 10

True

Question 11

is helpful for
exploring and mapping
the ocean because
sound waves travel
farther in the water
than do radar and light
waves.

Answer 11

Sonar

Question 12

 Scientists primarily use ___ to develop nautical charts,
locate underwater hazards to navigation, search for and
map objects on the seafloor such as shipwrecks, and map
the seafloor itself.

Answer 12

sonar

Question 13

light with the longest wavelength appears red,
and light with the shortest wavelength appears violet.

Question 14

________ is light that has wavelengths that can be detected by
the human eye.

Answer 14

Visible light

Question 15

The ________of visible light determines the color that the light
appears.

Answer 15

Wavelength

Question 16

light with the longest wavelength appears red,
and light with the shortest wavelength appears violet.

Answer 16

Red, violet

Question 17

A ____ can be used to separate visible light into
its different colors.

Answer 17

Prism

Question 18

The process by which light is separated into its
colors due to differences in degrees of refraction
is called ________

Answer 18

Dispersion

Question 19

An _______ object is one that doesn’t let light pass
through it. Instead, it reflects or absorbs the light that
strikes it.

Answer 19

Opaque

Question 20

A __________________, such as
window glass, transmits some or all of the light
that strikes it.

Answer 20

Transparents or Translucent material

Question 21

The human eye can distinguish
only _____________?

Answer 21

red, green and blue light

Question 22

__________________- are
called the secondary colors of
light.

Answer 22

Yellow magenta cyan

Question 23

__________ is a substance that colors materials by reflecting
light of certain wavelengths and absorbing light of other
wavelengths.

Answer 23

Pigment

Question 24

White light is composed of --------------------. Your eye blends the colors and your brain “sees” white light.

Answer 24

an infinite number of individual colors

Question 25

White light is composed of --------------------. Your eye blends the colors and your brain “sees” white light.

Answer 25

an infinite number of individual colors

Question 26

is when waves, whether physical or electromagnetic, bounce from a surface back toward the source.

Answer 26

Reflection

Question 27

is when waves, whether physical or electromagnetic, bounce from a surface back toward the source.

Answer 27

Reflection

Question 28

is when waves, whether physical or electromagnetic, are deflected when the waves go through a substance.

Answer 28

Refraction

Question 29

is also described as bending of light as it passed from one transparent medium into another.

Answer 29

Refraction

Question 30

is an atmospheric discharge which usually occurs during a rain storm.

Answer 30

Lightning

Question 31

is the audible energy discharge from a lightning flash.

Answer 31

Thunderclap

Question 32

also known as the apparent temperature, is what the temperature feels like to the human body when relative humidity is combined with the air temperature.

Answer 32

The heat index

Question 33

involves a change of phase from solid to gas.

Answer 33

Sublimation

Question 34

is when a substance goes from gas to solid.

Answer 34

Deposition

Question 35

is the process by which water vapor changes to liquid.

Answer 35

Condensation

Question 36

is the change of liquid into water vapor.

Answer 36

Evaporation

Question 37

Two types of Force?

Answer 37

Balanced and unbalanced forces

Question 38

is a phase change where is solid is converted to liquid by the application of heat.

Answer 38

Melting

Question 39

is a phase of change from liquid to solid.

Answer 39

Freezing

Question 40

Acceleration is directly proportional to _________

Answer 40

Net external force

Question 41

opposition to the flow of electric charges that occurs when electric current travels through matter.

Answer 41

RESISTANCE

Question 42

materials that have low resistance to electric current

Answer 42

Conductors

Question 43

materials that have high resistance to electric current

Answer 43

Insulators

Question 44

- A longer wire has _____ resistance.

Answer 44

more

Question 45

- A shorter wire has _____ resistance.

Answer 45

less

Question 46

A cooler wire has ___resistance than a warmer wire.

Answer 46

less

Question 47

The SI unit for both work and energy is ________?

Answer 47

joule (J), or Newton ot meter (N ∙ m).

Question 48

___ joule is the amount of energy needed to apply a force of 1 Newton over a distance of 1 meter.

Answer 48

1

Question 49

Kinetic energy is the energy of _____?

Answer 49

moving matter