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***Science 7 Unit 2A Solar System Review Flashcards | StudBud
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***Science 7 Unit 2A Solar System Review
***Science 7 Unit 2A Solar System Review
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1
What would cause a decrease in the gravitational pull between the sun and Earth?
if Earth was closer to the sun
if the sun was farther away from Earth
if the sun was twice its size
if Earth was twice its size
2
The force which holds our solar system together is ___________________.
dark matter
gravity
scotch tape
superglue
3
Why do students and scientists make scale models of nature?
to correct mistakes
to collect data from natural events
to better observe patterns/relationships
to define new units of measurements
4
Which fossilized organisms are most likely found in Earth's lowest layers of rock?
snails
dinosaurs
bacteria
reptiles
5
A planet with a solid, inner core is...
a comet
an outer planet
a moon
an inner planet
6
All objects in the solar system follow an orbital path...
Around the Sun due to gravitational force
On a path depending on how many moons they have
Around the Earth due to gravitational force
On their own path according to their gravity
7
The _________________________ is our sun and all the planets and other bodies orbiting it.
galaxy
solar system
constellation
star system
8
If the moon grows to twice its size but stays in the same place, how would the gravity between Earth & moon be affected?
Gravity would be multiplied by four.
Gravity would be halved.
Gravity would double.
Gravity would not change.
9
If the sun were farther away from the Earth, what would happen?
Gravity would increase.
There would be no gravity.
Nothing
Gravity would decrease.
10
If the moon grows to twice its size but stays in the same place, what happens to gravity between the Earth and moon?
It quadruples.
It stays the same.
It doubles.
It halves.
11
A ___ becomes a ___ when it lands on Earth's surface.
meteor; meteorite
meteor; shooting star
meteorite; meteor
asteroid; meteorite
12
Which correctly compares the planets Venus and Mercury?
Both are hot planets, but ony Mercury is larger than Earth.
Both are rocky planets; only Venus spins in the same direction as Earth.
Both are close to the sun but only Mercury has an atmosphere.
Both are small but Venus is hotter.
13
When meteoroids enter the earths atmosphere they...
freeze and become a comet
create a visible streak of light created by friction
disinigrate and no one ever knows it
explode and fall to the earth as ash
14
What is an icy object that has an orbital path and has a visible tail?
An asteroid
A comet
A meteorite
A dwarf planet
15
What object in our solar system has the greatest gravitational force?
Earth
The Sun
Jupiter
The Asteroid Belt
16
A planet that is made of lighter elements which are gasses is ...
an outer planet.
an asteroid.
an inner planet.
a moon.
17
What is the smallest planet in our Solar System?
Pluto
Uranus
Venus
Mercury
18
Fossilized bacteria are found in Earth's lowest layers of rock.
True
False
19
Which ball would have the least amount of gravitational attraction to the red and white ball?
The orange ball
The green ball
The purple ball
The blue ball
20
The force of attraction between two objects based on their mass and distance is ___________.
Doppler effect
gravity
dark matter
blueshift
21
Why do objects orbit the sun?
The sun is so bright that objects are forced away.
The sun is moving so quickly that other objects move around it.
The sun is so massive that it has the most gravity.
The sun releases heat that pushiesobjects away.
22
A meteor looks like a streak of light in the night sky. What actually is a meteor?
an object made of ice and dust that orbits the sun
a large piece of ice that broke free from an outer planet
a rock or grain of sand burning up in the atmosphere
a rock orbiting the sun between Marks and Jupiter
23
The rock layers contain the history of the Earth. The deeper the rock layer, the _________ the fossil.
younger
Depth does not determine age of fossil.
older
24
A small, icy object that develops a glowing tail as it nears the Sun.
Comet
Meteorite
Satellite
Asteroid
25
Which planet is approximately four times larger than the diameter of Venus on a scale model?
Mars
Earth
Mercury
Neptune
26
Objects orbit the sun because it is so massive and therefore has lots of gravity.
True
False
27
The same ratio of "heavy water" on Earth as on some comets is evidence that Earth's water may have come from comets.
False
True
28
______ are being used by scientists to organize Earth's history.
fossils
rock layers
geologic time scales
mass extinctions
29
Why do students and scientists construct scale models of natural phenomena?
to define new units of measurement
to correct mistakes in nature
to collect data from natural events
to better observe patterns and relationships
30
Which planet is considered to be Earth's "twin" due to their similar size?
Neptune
Venus
Mars
Mercury
31
What factors influence the strength of attraction (gravity) between two objects?
size and density
weight and volume
mass and distance
composition and location in the Universe
32
Which would be a limitation of a solar system model?
You know which scale to use.
You know the size of planets.
You have the materials you need.
You run out of materials.
33
What is true of the outer planets, farther away from the sun?
They are all the same size.
They are all blue in color.
They are larger than the inner planets.
They all have more than 60 moons.
34
Which statement BEST describes the distances between planets in the solar system?
It decreases the farther you move from the sun.
It has varying distances with no specific pattern.
It increases the farther you move from the sun.
It stays the same for all planets in the solar system.
35
A student wants to make a scale model of the solar system. What step is most important?
Be sure to put the Earth in the center.
Be sure to have equal distances between each planet.
Be sure to color the planets.
Be sure to define the scale.
36
Gravity increases with decreasing distance between objects.
False
True
37
What is being used by scientists to organize Earth's history?
fossil record
mass extinctions
geologic time scale
layers of rock
