1. Which part of a comet\'s tail curves outward from its head? A. the ion tail B
ID: 236069 • Letter: 1
Question
1. Which part of a comet's tail curves outward from its head?
A. the ion tail B. the coma tail
C. the dust tail D. the iceball tail
2. The asteroid belt is located between the orbits of which two planets in our solar system?
A. Venus and Earth B. Uranus and Neptune
C. Mars and Jupiter D. Mercury and Venus
3. The large asteroid whose orbit allows it to approach closest to the Sun is named
A. Apollo B. Ceres
C. Juno D. Icarus
4. What prevented the material now located in the asteroid belt from forming into a planet?
A. There is not enough material in this region of space.
B. The gravity of the Sun and Jupiter interacted to prevent it.
C. Nuclear explosions broke up the material several times.
D. It did from but a collision with a comet broke it up again.
5. If a body in the asteroid belt is smaller than about 100 meters it is not called an asteroid but is referred to as
A. a minor planet B. a comet
C. a meteroid D. a protoplanet
6. Comets are divided into two main classes. There are
A. short period comets and long period comets.
B. inner comets and outer comets
C. ion comets and dust comets
D. bright comets and dim comets
7. Another descriptive name used for a comet is
A. protoplanet B. dirty iceball
C. meteorite D. interstellar wanderer
8. The head of a comet is also referred to as
A. the nucleus B. the hydrogen envelope
C. the coma D. the Oort cloud
9. Swarms of meteoroids that intersect the orbit of the Earth as it travels around the Sun are related to the debris left by
A. fragmented comets
B. man-made satellite debris
C. emissions from volcanoes on our own Moon
D. solar winds material
10. In the formation of planets, differentiation refers to
A. the formation of inner and outer planets.
B. the settling of heavier material to center regions during formation.
C. the distribution of comets in the Oort Cloud.
D. the presence or absence of an atmosphere around a planet. Physical Science 1000
Explanation / Answer
The Dust tail curves outward from the head of a comet, because the Ion tail is usually aligned according the magnetic field of the sun and other nearby planets. Hence the answer is (C) Dust tail. This curved tail is sometimes also referred to as ‘anti tail’ because of this curving. The asteroid belt is located between the orbits of (C) Mars and Jupiter, and separates the planets in our solar system into “inner solar planets” which are Mercury, Venus, Earth, Mars and “outer solar planets” which are Jupiter, Saturn, Uranus, Neptune. The main reason for the asteroids to exist in that place is because Jupiter has a very high gravity, hence it holds all the asteroids close to its orbit. Hence correct answer is (C). The answer is (A) Apollo. Apollo are a class of asteroids that have large elliptical orbits with the semimajor axis more than 1 AU (Astronomical Unit, distance from earth to sun) and the perihelion distance of Apollo asteroids are less than that of Earth which is 1.017 AU. The material in the asteroid belt could not form into a planet because at that distance, the gravity of the sun wasn’t strong enough to make these rocky asteroids collide with each other and fuse them into a planet as there was already a big gas giant planet, whose gravity was so strong, it was counteracting the sun’s gravitational pull thus leaving all the asteroids to just float in bits and pieces. Hence answer is (B). (C)Meteroid. Meteroids are small masses that roam around in the solar space and which would become a meteorite if they enter the earth’s atmosphere. They are usually smaller than 100 meters. The main two classes of comets are (A) short period comets and long period comets. The time period of a comet is defined by the eccentricity of the elliptical orbit that the comet takes to go around the sun. Long period comets do not come any closer to the sun than the Jupiter’s orbit. But the short period comets come even within the orbits of the inner planets like Earth. Comets are usually called as (B)Dirty Ice balls because they carry a lot of ice within their mass and leave a trail of dust along their trajectory. The dust and Ice from the comet give it that name. The head of the comet is often referred to as the (A)Nucleus. It is the main rocky part of the comet and is mainly composed of the minerals that make up the comet. The debris is left by (A)fragmented comets that break due to uneven reaction forces from their tails. As the dust tail and ion tail could be in counteracting directions and finally break the comet. Differentiation of a planet refers to (B) the settling of heavier material to center regions. That’s how all the Iron in our planet, sunk to the center to form our Iron rich core, whereas the lighter silica formed the crust and upper parts
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