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Exam1 Pg 1-65 Energy > Exam 1 > Flashcards

Exam 1 Flashcards

0
Q

An object with potential energy is

A

At rest

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1
Q

The ability to do work.

A

energy

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2
Q

What kind of energy do fuels contain?

A

Potential

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3
Q

Are fuels, wind, and moving water partially or directly dependent on solar energy?

A

Partially

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4
Q

By what method does heat energy travel and gets transferred from molecule to molecule.

A

Conduction

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5
Q

Is wood a good conductor or insulator?

A

Insulator

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6
Q

When a gas or liquid is heated, in which way do the molecules move?

A

Away from each other

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7
Q

When heat energy is transferred by the circulation of heated materials, it is called:

A

Convection

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8
Q

Liquid and gases transfer heat by what method?

A

Convection

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9
Q

Radiant energy produces what kind of energy when it strikes something?

A

Heat energy

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10
Q

Light rays are a form of what kind of energy?

A

Radiant

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11
Q

During photosynthesis, what kind of energy do plants use?

A

Radiant energy

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12
Q

Photosynthesis results in the production of:

A

Oxygen

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13
Q

Food and fuels are both the result of what kind of energy?

A

Chemical

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14
Q

What is the longest wavelength of light visible to the human eye?

A

Red

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15
Q

Can sound energy pass through empty space?

A

No.

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16
Q

Sounds with a high pitch are vibrating at what kind of frequency?

A

High ( short and fast)

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17
Q

Is pushing against a rock, but not moving it work.

A

No.

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18
Q

Name two measurements of work:

A

Power•time

Force•distance

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19
Q

What unit measures heat energy?

A

Calorie

20
Q

What unit measures electric energy?

A

Kilowatt

21
Q

What unit measures force

A

Foot-pound

22
Q

What is important when measuring power. Time, pitch, or heat?

A

Time

23
Q

Name two material which absorb radiant energy well.

A

Dark colors

Soil and rocks

24
Q

Name materials that reflect radiant energy well.

A

Light colored materials
Smooth shiny surfaces
Large bodies of water

25
Q

Does matter have volume?

A

Yes

26
Q

Is the density of a of pound cotton and a pound of lead the same or is it different?

A

Different

27
Q

Carbon dioxide, water, and glucose are made of two or more elements so they are:

A

Compounds

28
Q

The smallest unit of an element which retains the characteristic of that element.

A

Atom. Atoms of iron are different than atoms of tin.

29
Q

Matter with a definite volume, but without a definite shape is a

A

Solid

30
Q

How do the number of protons and electrons relate in an atom? They are:

A

Equal

31
Q

What subatomic particle is farthest from the nucleus of atom, and is in the highest energy level?

A

Electron

32
Q

Most of an atoms mass is in its

A

Nucleus

33
Q

The chemical symbol for Sodium

A

Na

34
Q

The total number of atoms represented by the formula 2CO2

A

6

35
Q

When two atoms join by sharing electrons the bond is called

A

Covalent

36
Q

An element that is found in all acids is called

A

Hydrogen

37
Q

An element found in all organic molecules is

A

Carbon

38
Q

A substance that has more hydroxyl ions (OH-) than hydrogen ions (H+), it is a

A

Base

39
Q

A substance which helps make a chemical change happen , but is not changed itself is called a

A

Catalyst

40
Q

Rusting iron is an example of what kind of change?

A

Chemical

41
Q

The process of changing from a gas to a liquid is called

A

Condensation

42
Q

A mixture in which the smallest particles of two or more substances are evenly distributed is known as a

A

Solution

43
Q

The Celsius temperature at which water becomes a solid is

A

0 degrees

44
Q

The temperature at which a substance freezes is also its

A

Melting point

45
Q

When the air pressure is low, the freezing point of water

A

Increases

46
Q

Negatively charged, smallest of particles, 2000 are needed to equal mass of a proton, located outside nucleus.

A

Electron

47
Q

Has a positive charge. Has the same number as electrons in an atom. Located with neutrons in the nucleus.

A

Proton

48
Q

Have neutral charge. Have almost same mass as protons. With protons they make up the nucleus of an atom

A

Neutron

Exam1 Pg 1-65 Energy (1 decks)

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