Brainscape's Knowledge GenomeTM

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


See full index

Science 8th > 6.2-6.5 Digital Lesson > Flashcards

6.2-6.5 Digital Lesson Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Solar system that contains one, two, or more then 2 stars

A

One: single star
Two: binary star system
More then 2: multiple star systems

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

Since stars are made up of gas they have structure

A

True

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

Once nuclear fusion begins, what do stars emit

A

Visible light and other forms of energy

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

When stars form during the early part of their life cycle, what is blown away

A

Dust and clouds

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

What takes place in the core of a star for most of its life cycle

A

Fusion

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

Nuclear fusion

A

When the atoms come together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Nuclear fission

A

The separating of atoms

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

Planetary nebulae

A

Expanding shells of gasses

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

Exposed core of a star

A

White dwarf

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

White dwarfs increase luminosity as they age

A

False

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

Black hole

A

When the core of a supergiant star collapses. Forms a black hole if it had a large mass

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

Coolest stars

A

Red dwarfs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Can infrared radiation be seen with the naked eye

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How can electromagnetic waves be described

A

Wavelength, frequency, and energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Energy is the ability to do

A

Work

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

A higher frequency means a _________ wavelength. A lower frequency means a __________ wavelength

A

Shorter;higher

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Can EM waves carry light

A

Yes

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

Can all EM waves travel at the same speed

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Can wavelength determine the type of radiation for an EM wave

A

Yes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Is visible light the only type of EM wave that humans can see

A

Yea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Does earths atmosphere not absorb dangerous gamma waves from space

A

No

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Continuous spectrum

A

Unbroken band of color that shows that it’s source is emitting light of all visible wavelengths

23
Q

Emission spectrum

A

Series of unevenly spaced lines of color and brightness which show that the light source is emoting only certain wavelengths

24
Q

Absorption spectrum

A

Continuous spectrum crossed by dark lines

25
Q

The dark lines on and absorption spectrum are formed when light from a glowing object passes through a cooler which absorbs some of the wave links

A

True

26
Q

Can scientists use the absorption spectrum to identify the gas with an object

A

Yes

27
Q

Can only soundwaves experience the Doppler effect

A

No

28
Q

EM wave that shows hot objects and black holes

A

X Ray

29
Q

Reflecting telescope

A

Uses mirrors to contract a visible light

30
Q

Refracting telescopes

A

Uses lenses to concentrate visible light

31
Q

What is the unit to measure the size of a star

A

Solar radii

32
Q

How many states make up a star cluster

A

Hundreds or even thousands

33
Q

Example of a star cluster

A

Omega Centauri

34
Q

When did the Hubble telescope begin sending pics to earth

A

1990

35
Q

How old is our universe estimated to be

A

13 billion years old

36
Q

How are stars held together

A

In galaxies

37
Q

How many galaxies in a galaxy cluster

A

Dozens

38
Q

Knowing ages of stats helps scientists estimate what

A

Age of universe

39
Q

Do all stars in a star cluster form at the same time

A

Yeah

40
Q

What were newtons thoughts about the universe

A

He thought it was unchanging and he thought stars were evenly scattered in the universe and could not change position

41
Q

Einsteins equations told him that the universe was

A

Changing and expanding

42
Q

What did Hubble observe that is considered evidence for the expanding universe

A

Red shifts

43
Q

What year was CMB first detected

A

1960s

44
Q

What 2 things do scientists compare to find the age of the universe

A

They use current rates of expansion to estimate past rates of expanison

45
Q

Hubble constant

A

Rate at which the universe is expanding

46
Q

3 things that support the Big Bang theory

A
  1. Traces of CMB
  2. Expanison of universe
  3. Red shifts
47
Q

Galaxies moving away from the Milky Way are

A

Red shift

48
Q

Galaxy moving toward earth

A

Blue shift

49
Q

Within the spectrum of the electromagnetic spectrum visible light

A

Red light has the longest wavelength and violet light has the shortest wavelength

50
Q

By analyzing the spectra of galaxies what did astronomers discover

A

The most distant galaxies are moving are moving apart faster then closer galaxies

51
Q

How do astromers learn about a stars composition

A

The colors and lines on a stars electromagnetic spectrum indicate which substances are present in the stars outer layers

52
Q

What did they discover That indicates that distant galaxies are moving apart

A

Light from distant galaxies is stretched in longer wavelengths

53
Q

How did the discovery that galaxies are moving farther apart help scientistists conclude that all matter was once merged together

A

It is based on the logic that things moving away from each other must have been close together before

Science 8th (35 decks)

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