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School Test Study > Science #3 - Energy Test > Flashcards

Science #3 - Energy Test Flashcards

Learn about energy

1
Q
  1. Which material is the best conductor of heat
    and electricity?
    A. Wood B. Metal
    C. Stone D. Plastic
A

B. Metal

Metals such as alluminum, copper, and steel are good thremal conductors because passes throught them quickly. Metals normally feel cold.

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2
Q
  1. Energy is transferred from the sun to Earth
    mainly by _______________.
    A. Mechanical Waves
    B. Air Currents
    C. Electromagnetic waves
    D. Conduction
A

C. Electromagnetic waves

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3
Q
  1. We see the sky as blue because of:
    A. reflection from the ocean
    B. absorption of ultraviolet rays
    C. scattering of blue light waves
    D. diffraction from water in the clouds
A

C. scattering of blue light waves

Scattering- an interractionof light with matter that causes lightto change direction. Light scatters in all direction.

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4
Q
  1. The main method of heat transfer occurring within
    water is called ______________.
    A. Conduction B. Convection
    C. Radiation D. Insulation
A

B. convection

Convection- heat transferred by the circulation or movment of liquids and gasses(fluids).

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5
Q

5.Thermal energy is transferred through a material
by the collision of __________ within the material.
A. waves B. atoms
C. crystals D. light

A

B.atoms

Thermal Energy transfer- thermal energy is tnasferred through a material by the collision of atoms within a material.

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6
Q
  1. Which of the following waves is not visible to
    the human eye?
    A. red light B. violet light
    C. ultraviolet light D. blue light
A

C. ultraviolet light

ultra violet light are shorter wave lengths and carry more energy then visible light.

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7
Q
  1. What kind of energy does a moving baseball
    have?
    A. electrical B. mechanical
    C. magnetic D. chemical
A

B. mechanical

Mechanical energy transfer- when an object push or pull on on each other.

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8
Q
  1. Which of the following is the best insulator?
    A. copper B. aluminum
    C. gold D. wood
A

D. wood

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9
Q
  1. What is the primary source of energy on Earth?
    A. The Sun B. The Moon
    C. water D. rocks
A

A. The Sun

The sun is the primary because powers photosyneisi and the water system.

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10
Q
  1. What form of energy causes an ice cube to melt?
    A. mechanical B. magnetic
    C. sound D. thermal
A

D. thermal

Thermal Energy Transfer- when a warmer object is in contact with a cooler one.

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11
Q
  1. When you are riding a bicycle at night, your bicycle’s
    reflectors help people in cars see your bicycle. How do
    bicycle reflectors work?
    A They are made of a special material that gives off its own light.
    B They are hooked up to batteries that allow them to produce light.
    C They bounce light back from other sources.
    D They are covered with paint that glows in the dark.
A

C They bounce light back from other sources.

Reflection- when light waves bounce of an object.

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12
Q

12.In general, metals are ___________________.
A. poor conductors of heat
B. fragile
C. poor conductors of electricity
D. good conductors of heat

A

D. good conductors of heat

Metals such as alluminum, copper, and steel are good thremal conductors because passes throught them quickly. Metals normally feel cold.

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13
Q
  1. Heat flows from warm objects to cooler objects
    until both objects are at ___________.
    A. expansion B. equilibrium
    C.thermal D. conduction
A

B. equilibrium

Thermal equilibrium is when the two object become hte same tempature

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14
Q
  1. Sunglasses allow some light to pass through.
    The sunglasses are _________________.
    A.transparent
    B.translucent
    C.opaque
    D.insulators
A

B.translucent

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15
Q
  1. The change in the direction of a wave when it
    passes from one medium to another is called
    _________________.
    A.Diffraction B. Reflection
    C. Refraction D. Superposition
A

C. Refraction

Refraction- occurs when light waves bend as they pass through a different medium

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16
Q
  1. What form of energy causes an ice cube to
    melt?
    A.mechanical B. magnetic
    C. sound D. heat
A

D. heat

Heat- the transfer of thermal energy between objects of different tempatures.

17
Q
  1. What change of state is shown?
    (a pot with steaming water)

A. Liquid to gas B. Solid to gas
C. Gas to liquid D. Solid to liquid

A

A. Liquid to gas

18
Q
  1. Which of the following causes white light to
    separate into the colors of visible light:
    A. Insulation B. Refraction
    C. Absorption D. Infrared Waves
A

B. Refraction

Refracted Light
Long wavelengths refracted less (like red)
Short wavelengths refracted more (like violet)

19
Q
  1. You can see through a car window because it
    is:
    A. Transitional B. Transverse
    C. Opaque D. Transparent
A

D. Transparent

20
Q
  1. Why does the leaf of a plant look green?
    A. Because it absorbs green light
    B. Because it reflects green light
    C. Because it absorbs yellow and blue light
    D. Because it reflects all colors of light
A

B. Because it reflects green light

Bananas are yellow because the color yellow is reflected off of the bananas All of the other colors of light are absorbed into the bananas.

21
Q
  1. Different wavelengths of light are seen as
    different ______________.
    A. Atoms B. Sounds
    C. Speeds D. Colors
A

D. Colors

Each color travels at a different wavelengths.
The color red has the longest wavelength.
The colot violet has the shortest wavelength.

22
Q
  1. What kind of wave can pass through the vacuum
    of empty space?
    A. Conduction wave
    B. Electromagnetic wave
    C. Mechanical wave
    D. Sound wave
A

B. Electromagnetic wave

Electromagnetic wave can transmit energy through matter or empty space
eg. sunlight

23
Q

Sound wave
23. Each of the following is an example of light
interaction, except:
A. Compression B. Reflection
C. Transmission D. Absorption

A

A. Compression

24
Q
  1. We can see the moon because:
    A. The moon reflects light from the sun
    B. The moon is a light source
    C. The moon emits and reflects light
    D. The moon reflects light from the earth
A

A. The moon reflects light from the sun

When do you see light?

The object must be a source of light
eg. the sun

Light must bounce of the object
eg. the moon

25
Q
  1. The diagram below shows an incomplete electrical
    circuit that includes a battery, a bulb, 2 wires labeled A
    and B.
    The bulb is not lit. What should be done in order to
    light the bulb and complete the circuit?
    A. Change the battery.
    B. Remove the bulb.
    C. Connect wire A to the battery.
    D. Connect wires B to the bulb.

The photo has an elctical circut and everything is in place, but wire B is not connected.

A

D. Connect wires B to the bulb.

Electrical Energy Transfer- when an electrical soureis connected in a complete circut to an elcetrical deivice.

26
Q
  1. Conduction involves heat transfer through direct
    contact
A

True

Conduction- heat transfered when two object touch (soilds).

27
Q
  1. Rainbows are caused by absorption.
A

False

Refracted Light
Long wavelenghts(red) relfected less
Short wavelengths(violet) relected more

28
Q
  1. Light from the sun provides heat and energy.
A

True

The sun is the primary source of energy for the earth, powering photoseiysis, and the water cycle

29
Q
  1. Black objects reflect all colors.
A

False

A black shirt absorbs all wavelengths and turning it into heat.
A white shirt reflects all wavelengths.

30
Q
  1. Infrared rays are emitted by all warm bodies.
A

True

Infared waves- carry less energy than visible light and are longer wavelengths.

31
Q
  1. All colors of light combine to make white.
A

True

A white shirt reflects all wavelengths.

32
Q
  1. Violet light waves are longer and so carry less
    energy than red light waves.
A

False

Each color travels at a different wavelengths.
The color red has the longest wavelength.
The colot violet has the shortest wavelength.

33
Q
  1. Thermal energy is always transferred from colder
    objects to warmer objects.
A

False

Thermal Energy Transfer
Thermal energy is always transferred from warmer
objects to cooler
objects.

34
Q
  1. Heat travels through solids primarily by radiation.
A

False

Conduction workd best in solids ( land and metals)

35
Q

Can light waves travel through empty
space? Why is this important?
(For full credit, write in complete sentences. Worth up to 5 points)

A

My Answer
Light can travel through empty space through radiation in the form of electromagnetic waves. This is important because without radition we could not live. Since radtion is what heats the earth. Since the way the sun heat reaches the earth is through radiation. Also, raditoin powers photosotheis and the water cycle.
*life would not exisit**

The Correct Answer
Light waves travel through empty space as
electromagnetic waves. This is very important
because if light could not travel through empty
space, light from the sun would never reach
earth. Light from the sun is responsible for
powering the water cycle as well as
photosynthesis. Life would not exist without
light.

36
Q
A

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