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3: which of the following statements is not a description of jupiter?
known for its red spot
largest planet in the solar system
one of the rocky planets
has several moons
4: the shape of a planet's orbit is influenced by gravity.
true
false
5: which of the following statements is not a description of venus?
closest planet to the sun
has a thick atmosphere
one of the rocky planets
has no moons
6:
which of the following statements is not a description of asteroids?
they orbit the sun.
they vary in size and shape.
most of them lie in a belt between earth and mars.
they are thought to be remains that never formed a planet.
7: two planets are orbiting a star. planet a is closer to the star than planet b. which description explains the expected motion of planets a and b?
planet b orbits faster than planet a.
planet b has a shorter orbital period than planet a.
planet a orbits faster than planet b.
planet a has an equal orbital period to planet b.
8: according to the chart below, which planet contains the most hydrogen gas? saturn
jupiter
venus
earth

3. one of the rocky planets

4. True

5. closest planet to sun

6. Most of them lie in a belt between Earth and Mars.

7. Planet A orbits faster than Planet B.

8. Saturn

Explanation:

3. Jupiter is the fifth planet of the solar system. It is the largest Jovian planet made of gases such as hydrogen. It has 79 known moons. The great red spot is a largest cyclone present on it which as big as two Earths'.

It is a gaseous planet and not a rocky one.

4. The shape of the orbit of a planet depends on the gravitational pull. The balance between the forward motion of planets and the gravitational pull of other planets and star determines the orbit. Thus, the given statement is true.

5. Mercury is the closest planet to Sun. Venus is the second planet from the Sun. It has very thick atmosphere which makes it the hottest planet of the solar system as the sun heat gets trapped in its thick atmosphere mostly made up of carbon-dioxide. Venus has no moons. It has a rocky surface.

6. Asteroids are the irregular sized and shaped bodies present in the solar system which orbit the sun. Most the asteroids are present between the orbits of Mars and Jupiter. These are thought to be remains of the planet which could never be formed between Mars and Jupiter.

7. From Kepler's law, we understand that the planets closer to the star have smaller orbital period i.e orbit faster than the planets which are farther. Thus, planet A which closer to the star would have shorter orbital period and faster orbital speed.

8. According to the given chart, Saturn contains most of the hydrogen gas. Saturn is a gaseous planet. It has so low density that it can even float on water. It is composed of hydrogen gas and metallic hydrogen. It is surrounded by a ring system.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.