Question

1. iron meteorites mostly came from

a. a blast furnace
b. a planet with magnetic moons
c. an alien spaceship that crashed
d. a differentiated planetesimal that was shattered by a collision

1. a nasa mission is planned to explore an asteroid named psyche (or psyche 16) because

a. it has an unusual orbit
b. its iron core is exposed
c. it is the oldest known asteroid in the solar system
d. it is a trojan asteroid
e. it resembles the early earth

1. an object 10 cm in size is hurtling toward the earth at high speed. it will soon encounter the earth’s atmosphere but its not there yet. it is called a

a. flying saucer
b. meteor
c. meteorite
d. meteororess
e. meteoroid

1. the planet with the most intense radiation belts around it is

a. mercury
b. earth
c. jupiter
d. saturn
e. neptune

1. the distance over which alien radio signals could be detected is about

a. 1000 miles
b. 30 a.u.
c. 1 light year
d. a few hundred light years
e. 100,000 light years

1. the oort cloud

a. occurs after a rapid increase in barometric pressure
b. is part of the kuiper belt
c. surrounds a moon of uranus
d. is a dusty part of the milky way galaxy
e. is the most distant part of the solar system

Explanation:

1. Iron meteorites are thought to come from differentiated planetesimals that were shattered by collisions. This is a well - established concept in astronomy related to the origin of meteorites.
2. The NASA mission to explore Psyche is because its iron core is exposed, providing a unique opportunity to study planetary cores.
3. An object in space heading towards Earth that has not yet entered the atmosphere is called a meteoroid. Once it enters the atmosphere, it is a meteor, and if it survives and lands on Earth, it is a meteorite.
4. Jupiter has the most intense radiation belts around it due to its strong magnetic field and large size, which can trap charged particles.
5. Alien radio signals could potentially be detected over a few hundred light - years with current and planned detection technologies.
6. The Oort Cloud is considered the most distant part of the Solar System, a spherical cloud of icy objects thought to be the source of long - period comets.

Answer:

1. D. a differentiated planetesimal that was shattered by a collision
2. B. its iron core is exposed
3. E. meteoroid
4. C. Jupiter
5. D. a few hundred light years
6. E. is the most distant part of the Solar System