Chapter 15-16 Flashcards Preview

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Flashcards in Chapter 15-16 Deck (60):
1

Scientists don't use colour names because they're somewhat subjective...

True

2

Brightly glowing hot objects radiate fairly ___ spectrum.

Continuous

3

Lasers and light-emitting diodes give off ____ light; or light having a single frequency.

Monochromatic

4

A light year is a measure of time.

False

5

A student sitting 10m away from projection screen gets __ the light as a student 5m away.

1/4

6

A firefly's light is an example of what kind of light?

Bioluminescence

7

We can see visible spectrum lines when light passes through what object?

A prism

8

Using a spectroscope a photo of line spectra can show what elements are heated make the light. The picture is made with a ___.

Spectrograph

9

The rainbow contains all possible colours.

False

10

What are the three additive primary colours?

Red, greens, and blue

11

There is a specific wavelength for magenta.

False

12

Pigments are made by ____ certain colours and ____ others.

Absorbing; reflecting

13

What indicates the intensity of a colour?

Saturation

14

What indicates the light or darkness of a colour?

Value

15

What kind of reflection does a sheet of paper produce?

Diffuse

16

What kind of reflection does aluminum foil produce?

Specular

17

The angle of ____ equals the angle of ____.

Incidence; reflection

18

What kind of image does a flat plane produce?

Virtual

19

Where do light rays converge after reflecting off a concave mirror?

Focal point

20

Convex mirrors can produce only virtual images.

True

21

What is the optical property that's the ratio or the speed of light in a vacuum to the speed of light in transparent material?

Index of refraction

22

If all the incident light rays reflect off a boundary between two transparent mediums instead of passing through. They experience ____.

Total internal reflection

23

A rainbow is an example of what phenomenon?

Light dispersion

24

Convex lenses are known as ___.

Converging lenses

25

Concave lenses are known as ___.

Diverging lenses

26

Telescopes and microscopes both have a long focal point.

False

27

What is inverse square law?

Moving twice as far from a light source gives you 1/4 the luminescence

28

What is incandescence?

Light from objects that are heated until they glow

29

What is fiber optics?

Growing field of technology with diverse applications

30

In the quantum model, electrons ___.

Occupy regions of space

31

The main purpose of neutrons is to ___.

Hold the nucleus together.

32

What is the charge of the electron?

Negative

33

What is the charge of the proton?

Positive

34

What is the charge of the neutron?

Neutral

35

To know the element of an atom you need to know___.

How may protons it has

36

The number of protons is the same as ___.

Electrons

37

Today's model of the atom is more workable but not necessarily closer to real life.

True

38

Many basic ideas of Dalton's atom model are still the same.

True

39

The radiation in a microwave is similar to that emitted when atoms undergo nuclear decay.

False

40

Thomson's plum pudding model resulted from him discovering the ___.

Electron

41

Rutherford's model added the ___ to the atom.

Neutron

42

In Bohr's model, electrons orbit at specific distances from the nucleus called ___.

Energy levels

43

What is the name of the current atomic model?

Quantum Model

44

Which subatomic particle determines an atom's chemical identity?

Proton

45

Atoms with the same number of protons but different numbers of neutrons are known as ___.

Isotopes

46

From a chemistry point of view the ___ energy level of the atom is the most important.

Valence

47

Radioactivity is the result of atoms with ___ nuclei.

Unstable

48

Alpha particles are identical to ___ nuclei.

Helium

49

A beta particle is an electron that is produced during the decay of a ___.

Neutron

50

What is it called when atoms split into smaller particles?

Nuclear fission

51

What do stars rely on for their energy?

Nuclear fusion

52

What are the products of radioactivity?

Alpha, beta, and gamma rays

53

Why are certain elements radioactive?

Unstable nuclei

54

What is the heaviest atomic particle?

Nutron

55

Nuclear decay can change one ___ to another.

Element

56

Beta particles are the same as ___.

Alpha particles

57

Where can nuclear fission occur?

In a nuclear reactor

58

In isotopic notation, what does the number in the top left represent?

Protons + neutrons

59

In isotopic notation, what does the number in the bottom left represent?

Protons

60

What is subtracted from the protons in alpha decay?

2