Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Science 8 > Energy > Flashcards

Energy Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
0
Q

Electromagnetic energy

A

-This is the energy that is radiated or given off in a form of transverse waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

Energy

A
  • The ability to do work
  • everything that is done in the universe involves the use or transfer of energy -most of earths surface processes are powered by energy from the sun
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Transverse waves

A

-Waves that vibrate at right angles in the direction in which they are moving

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Visible light waves

A
  • type of electromagnetic energy that is radiated by the sun and observed with the human eye
  • only part of the electromagnetic spectrum That can be seen by the human eye
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Characteristics and types of electromagnetic energy

A
  • distinguished by their different wavelengths
  • wavelength is the distance from one crest to a wave to the next crest
  • electromagnetic spectrum shows us the different types of electromagnetic energy in order of increasing wavelengths
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The order of increasing wavelengths

A

Radio waves, microwaves, infrared, ultraviolet, x-rays and gamma rays

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The two groups of electromagnetic wavelengths

A
  • With a wavelength longer than visible light it is called longwave
  • with wavelengths shorter then visible light is called a shortwave
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Reflected

A

Bounced off the material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Refracted

A

Bent in their passage through materials or varying density

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Scattered

A

Refracted or reflected in various directions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Transmitted

A

Passed through the material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Absorb

A

Taken into the material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Absorption

A
  • surface determines the amount of electromagnetic energy that can be absorbed
    - -example; the darker the color of the surface material the more visible light it will absorb
  • roughness or smoothness of the surface also affects the amount of electromagnetic energy that will be absorbed
  • rougher surface the more energy it will absorb/ the less it will reflect
  • the more effective a material is at absorbing the better it will also be at radiating electromagnetic energy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Transfer of energy

A
  • Energy moves from a source to a sink -transfer of energy from a region of higher temp. To a region of lower temp. is called heat energy
  • heat transfers thermal energy which is the energy of the motion of atoms in molecules
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Dynamic equilibrium

A
  • heat will continue to move from the source to the sink until their energies are equal making a dynamic equilibrium
  • at dynamic equilibrium a region loses and gains equal amounts of energy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Conduction

A

The transfer of heat energy from atom to atom or molecule to molecule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Convection

A
  • transfer of heat by movement and fluids (gases and liquids) caused by differences in density
  • warmer portions of fluid have lower densities and rise above cooler portions
  • higher density portions of fluid are pulled down and displace less dense objects pushing them upwards
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Convection current

A

Circulatory motion the transfers heat energy from one place to another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Radiation

A
  • heat is transferred through electromagnetic waves

- can occur in liquids, solids and gases -does not require a medium to transfer the energy

19
Q

Transformation of energy

A

The changing of one type of energy into another type of energy

20
Q

Mechanical energy

A
  • 1; all the energy of an object or system not related to the motions of atoms and molecules
  • 2; the total of the potential and kinetic energy of an object or system
21
Q

Kinetic energy

A

An object in motion

22
Q

Potential energy

A

Related to position or phase or known as stored energy

23
Q

Kinetic and potential

A

Either Kinetic or potential energy can be transformed into the other

24
Q

Temperature and heat

A

The temperature of an object is directly related to the amount of heat or thermal energy in the object or region

25
Q

Temperature

A
  • measure of kinetic energy of the particles of a body of matter
  • not a type of energy
  • greater the average of kinetic energy of the particles of matter the higher the temperature
26
Q

Specific heat

A

The quantity of heat needed to raise the temperature of 1g of any substance 1C
-could also be thought of as the resistance of material has to heating or cooling off

27
Q

What has the highest specific heat

A

Liquid water

28
Q

Melting

A

Changing from solid to liquid

29
Q

Solidification a.k.a. freezing

A

Changing from liquid to solid

30
Q

Evaporation

A

Changing from liquid to gas

31
Q

Condensation

A

Gas to liquid

32
Q

Deposition

A

Changing of gas directly to solid

33
Q

Phase changes

A
  • when the material is going through a phase change its temp. will stay the same as it is heated
  • turns from solid to liquid or liquid to gas: must gain heat
  • turns from gas to liquid or from liquid to solid: must lose stored heat
34
Q

A concrete play area is resurfaced was dark colored asphalt compared with the amount of heat energy that was absorbed by the old concrete surface the amount of heat energy absorbed by the dark-colored asphalt surface will most probably be

A

Greater

35
Q

The following diagram represents the path of visible light travels from air to water to air through a glass container of water. The light does not travel in a straight line because of

A

Refracted

36
Q

An ice cube is placed in a glass of water at room temperature which heat exchange occurs between ice and water within the first minute

A

The ice cube games he in the water loses heat

37
Q

The following map shows for locations and a temperature field the temperature of each location is given in degrees Celsius heat energy will normally flow

A

From A to B because the hot air rises to cold air

38
Q

A barefoot student stuff on the hot concrete surface most of the heat transfer to the students can buy this contact is by the process of

A

Conduction

39
Q

Drawn a volcanic irruption a rock is thrust upward into the air from point a to point B I shown in the following diagram witchcraft best represent the relationship between the height of the rock as potential energy as it rises

A

Three as the height increases so does the potential energy

40
Q

The transfer of heat energy from the sun Earth takes place by

A

Radiation

41
Q

Water vapor solidifies an atmosphere to form ice crystals and clouds which statement best describes exchange of heat energy during this process

A

Heat energy is released from the water vapor into the atmosphere

42
Q

Which process results in the release of stored heat energy

A

Condensation

43
Q

Which process requires the most absorption of energy by water

A

vaporization 1 g of liquid water

44
Q

The suns energy is often converted into potential energy by

A

Evaporation of water from the oceans

Science 8 (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions