1. Scientists hypothesize that the sun formed ____. (1 point)
less than a billion years ago
from a cloud of gas and dust
less than a million years ago
from a chunk of Jupiter
2. Two of the inner planets are ____. (1 point)
Venus and Saturn
Mars and Venus
Earth and Pluto
Mercury and Jupiter
3. Pluto alters the orbit of which planet? (1 point)
Uranus
Saturn
Neptune
Jupiter
4. Small pieces of rock that enter Earth's atmosphere at speeds of 15 to 70 km/s and burn up are called ____. (1 point)
stars
meteors
meteorites
asteroids
5. ____ is the largest planet in the solar system, is the fifth planet from the sun, and has colorful clouds. One of its 17 moons is the most volcanically active object in the solar system. The planet has a liquid ocean and an atmosphere comprised mostly of hydrogen and helium. It may have a rocky core, although its extreme pressure and temperature would make the core different from any rock on Earth. (1 point)
Jupiter
Saturn
Uranus
Neptune
6. Water is found as a solid, liquid, and gas on ____. (1 point)
Mercury
Venus
Earth
Mars
7. Galileo used his telescope to discover evidence for the sun-centered model of the solar system. This evidence included all of the following EXCEPT ____. (1 point)
Venus going through phases
Venus revolving around the sun, not Earth
the discovery of Neptune and Pluto
both a and b
8. A main sequence star becomes a ____ after it uses up the hydrogen in its core. (1 point)
nebula
supernova
black hole
giant
PSYDAG Bro chilll
a
b
a
a
a
aa
a
a
aa
a
a
help a lot thank you
1. To answer this question, we need to recall the scientific hypothesis on how the sun formed. According to scientists, the sun formed from a cloud of gas and dust, which makes the correct answer:
- from a cloud of gas and dust
2. To answer this question, we need to know the names of the inner planets in our solar system. The four inner planets are:
- Mercury
- Venus
- Earth
- Mars
Among these options, only one pair of planets is mentioned:
- Mars and Venus
Therefore, the correct answer is:
- Mars and Venus
3. To answer this question, we need to understand which planet's orbit is affected by Pluto. Pluto is a dwarf planet and its gravitational pull affects the orbit of another planet in our solar system. The correct answer is:
- Neptune
So, Pluto alters the orbit of Neptune.
4. To answer this question, we need to identify the term used for small pieces of rock that enter Earth's atmosphere and burn up. Among the options, only one term matches the description:
- meteors
So, small pieces of rock that enter Earth's atmosphere and burn up are called meteors.
5. To answer this question, we need to recall the characteristics of the largest planet in the solar system, which has colorful clouds and an active moon. The correct answer is:
- Jupiter
Jupiter is the largest planet, has colorful clouds, and one of its moons (Io) is the most volcanically active object in the solar system.
6. To answer this question, we need to know which planet water is found as a solid, liquid, and gas. Among the options, only one planet meets this criteria:
- Earth
So, water is found as a solid, liquid, and gas on Earth.
7. To answer this question, we need to identify what Galileo discovered using his telescope that supported the sun-centered model of the solar system. Galileo made several observations that supported the heliocentric model, but one of the observations listed in the options is not correct:
- the discovery of Neptune and Pluto
Galileo did not discover Neptune and Pluto as they were discovered at a later date. The correct answer is:
- both a and b
Galileo observed Venus going through phases, which provided evidence for the sun-centered model, and also Venus revolving around the sun, not Earth.
8. To answer this question, we need to understand what a main sequence star becomes after it uses up the hydrogen in its core. When a main sequence star exhausts its hydrogen fuel, it undergoes changes. The correct answer is:
- giant
A main sequence star becomes a giant after it uses up the hydrogen in its core.
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