Science Eca Flashcards
Three types of galaxies
Spiral
Elliptical
Irregular
Our solar system is located in the center of the Milky Way (T F)
False
The giant impact hypothesis is that something very large hit earth throwing bits into space the pieces floated around, and eventually came together to make the moon.
(Picture to put in order)
A (blank) occurs when the Moon moves directly between the Sun and Earth and throws a shadow on Earth
Solar Eclipse
The yearly orbit of Earth around the Sun is…
Revolution
Where is earth in December
D. The northern hemisphere is tilted away from the Sun in December
Where is the northern hemisphere in the summer?
B
Which statement is true about both the September equinox and the March equinox?
There are about 12 hours of daylight and 12 hours of darkness
When the north end of Earths rotation axis is pointed toward the Sun, which statement is true?
The northern hemisphere recurved more light from the Sun
A solstice is a day when
More than one choice is correct
The seasons are caused by
The direction Earths rotational axis is pointed
Watch YouTube vid about phases of moon
😁
During (blank) phases more of the moon becomes visible each night
Waxing
The time for one rotation of the moon is 27.3 days. What is the time for one revolution?
27.3 they are the same
During which lunar phase is only the western half of the moon lit right handed side?
First quarter
During which phase is only the eastern half of the moon, lit left-handed side?
Third quarter
When the shadow of the moon appears on earth surface, a blank, is occurring?
Solar eclipse
why do solar eclipses only happen during a new moon?
A solar eclipse occurs only when the Moon crosses Earth’s orbit in a direct line between Earth and the Sun.
A lunar eclipse can only occur during which type of moon phase?
full moon
Why don’t solar eclipses occur every new moon?
The Moon’s orbit around Earth and Earth’s orbit around the Sun are not in the same plane, so the three bodies only line up occasionally.
Two of the terrestrial planets are _
Mars and Venus
Largest planet
Jupiter
Third planet from sun
Earth
The orbits of ____ lie closer to the Sun than does Earth’s orbit.
Mercury and Venus are the planets closest to the Sun.
Use the table to answer the questions.
Average Distance of the Planets from the Sun
Planet
Average Distance (km)
Average Distance (AU)
Mercury
57,910,000
0.39
Venus
108,210,000
0.72
Earth
149,600,000
1.00
Mars
227,920,000
1.52
Jupiter
778,570,000
5.20
Saturn
1,433,530,000
9.58
Uranus
2,872,460,000
19.20
Neptune
4,495, 060,000
30.05
In astronomical units, about how much father is Saturn from the Sun than Jupiter? 2 AU
About how many times farther is Saturn from the Sun than Jupiter is?
[ Select ]
About how many times farther is Neptune from the Sun than Jupiter is?
[ Select ]
In astronomical units, about how much farther is Mars from the Sun than Mercury is?
[ Select ]
What is the basic astronomical unit based on? 1,000,000,000 km
What is the basic shape of every planet’s orbit? Helical
Answer 1:
2 AU
Answer 2:
9 times
Answer 3:
6 times
Answer 4:
2 AU
Answer 5:
1,000,000,000 km
Answer 6:
Helical
Which of the following is a common trait of the terrestrial planets?
They all have a solid outer layer.
Where do stars form?
nebula
Which shows the evolution of some massive stars in the correct order?
nebula, protostar, supernova, neutron star
At the end of a star’s life cycle, it releases gas into space that can be recycled into new stars. What do scientists call the area or cloud of recyclable materials?
supernova remnant
A _____ is a huge collection of stars.
galaxy
Which best describes the location of our solar system?
in a galaxy called the Milky Way, which is part of a cluster of galaxies called the Local Group
The hottest stars in space are _____ in color.
blue
A _____ is a region so dense that nothing, including light, can escape its gravitational field.
black hole
The coolest stars in space are _____ in color.
red
A sequence of star colors from hottest to coolest is _____.
blue, yellow, orange, red
A star begins as a _____, a large cloud of gas and dust.
nebula
Two stars orbit each other in a(n) _____ star system.
binary
The spiral shape of the Milky Way Galaxy CANNOT be seen from Earth because
we are located inside the galaxy
The _____ states that between 15 and 20 billion years ago, the universe began expanding out of an enormous expansion.
big bang theory
A red shift in the spectrum of light from an object indicates the object is moving _____ you.
away from
Earth’s yearly orbit around the Sun
axis
Changing appearances of the Moon from Earth
equinox
Moon phase in which none of the lighted surface of the Moon can be seen from Earth
first-quarter
When the Sun’s rays strike Earth directly at the equator
rotation
Turning of Earth on its axis
third-quarter
Moon phases in which the amount of lighted surface seen on Earth increases
new moon
Imaginary line extending between the poles around which Earth spins
:)
Occurrence caused by Earth’s coming between the Sun and the Moon and casting its shadow on the Moon
29.5 days
Moon phase in which none of the lighted surface of the Moon can be seen from Earth
solar eclipse
Amount of time of the Moon’s revolution and rotation
third quarter
Waxing Moon phase in which one half of the Moon’s lighted surface can be seen from Earth
lunar eclipse
Occurrence caused by the Moon’s being between the Sun and Earth and casting its shadow on Earth
first quarter
Phase in which all of the lighted side of the Moon can be seen from Earth
new moon
Waning Moon phase in which one half of the lighted side of the Moon can be seen from Earth
:)
layers of the sun
youtube vid
What term describes the diffuse cloud of gas and dust? #1
What force causes the cloud of gas and dust to collapse in on itself? #2
What object begins to form at the center of the proto-planetary disk before thermonuclear fusion begins? #3
The planets can form from the materials in the protoplanetary disk. What are the two types of planets that could result? #4
:)
What are the two measurements that are recorded on the Hertzsprung-Russell diagram?
Temperature and luminosity
In general, as we increase the surface temperature of a main-sequence star, the lifetime of the star
[ Select ]
.
In general, as we increase the luminosity of a main-sequence star, the size of the star
[ Select ]
.
Answer 1:
decrease
Answer 2:
increase
What are their spectral classes and luminosity of the following stars?
Betelgeuse spectral class
[ Select ]
and luminosity
[ Select ]
Bellatrix spectral class O and luminosity
[ Select ]
Procyon B spectral class
[ Select ]
and luminosity
[ Select ]
The sun spectral class
[ Select ]
and luminosity
[ Select ]
Answer 1:
M
Answer 2:
10^3
Answer 3:
O
Answer 4:
10^1
Answer 5:
G
Answer 6:
10^-5
Answer 7:
F
Answer 8:
1
What star has a spectral class of K and a luminosity of 102? Arcturus
What star has a spectral class of A and a luminosity of 10-3?
[ Select ]
What star has a spectral class of A and a luminosity of 106?
[ Select ]
What star has a spectral class of G and a luminosity of 103?
[ Select ]
Answer 1:
Arcturus
Answer 2:
Procyon
Answer 3:
Antares
Answer 4:
Arcturus
Let’s read the following scenario and match each statement with the correct answer.
Mr. Marsden was interested in finding the fastest way to get to school. He decided to compare the time of his normal route to school (A), with the other two possible routes he could take (B and C). His hypothesis was that if he took route B, then he would arrive at the school with the fastest average time.
Each time Mr. Marsden traveled the routes, he made sure to drive the same speed, same car, and was the only car on the road. The only difference in the experiment was the actual route chosen to school.
The data was recorded and written down and recorded as minutes.
Route A
Route B
Route C
Try 1
6.1
7.4
4.5
Try 2
7.3
5.4
8.1
Try 3
6.2
6.7
6.3
Average
6.53
6.5
6.3
The control was __________.
Route A
The independent variable was ________.
Different routes
The dependent variable was ________.
Average time to school
The hypothesis was ________.
