Other Objects in the Solar System Answers

8 verified answers1 views
1
Free Preview

A comet is a

A
meteoroid that travels through Earth’s atmosphere and hits the surface.
B
meteoroid that burns up in Earth’s atmosphere, producing a streak of light.
C
small, rocky object that orbits the Sun and is usually found in a belt between the orbits of Mars and Jupiter.
D
small object made of ice and dust that orbits the Sun and forms a coma as it approaches the Sun.
3

65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large deposit of dust that contained substances only found in asteroids. What most likely killed off the dinosaurs?

A
An asteroid impact caused the Sun to be blocked.
B
They were crushed by an asteroid.
C
The water supplies were polluted.
D
Mammals evolved to be better competitors.
4

Iridium is a substance found only in asteroids and other space objects. This graph shows the amount of Iridium found in different sediment layers of Earth. They are marked off into 17 sections representing time.

Question illustration
A
A massive volcano erupted, causing global warming and lava flow, which in turn caused mass extinction.
B
More iridium was produced by space objects and dumped by local factories.
C
The impact of a space object led to the deposit of a layer of sediment high in iridium.
D
Fewer impacts lead to a drop in iridium levels and a mass extinction caused by a lack of sunshine.
6

A scientist finds a piece of rock in a crater. He analyzes the rock and realizes that the composition is mostly of iron and nickel. He claims that he found a meteor. What is most likely the scientist’s error?

A
He actually found a meteorite.
B
His analysis of the composition is not correct.
C
He incorrectly used the term “crater.”
D
He actually found a meteoroid.

Did you find these answers helpful?