Astronomy S1

What is a nebula?

• A nebula is when the sun crosses the equater and day and night are equal.

• A nebula is a cloud of gas or dust visible in the night sky.

• A nebula is a shade or a shadow.

• A nebula is a star with a hot, dense core that fuses hydrogen into helium to produce energy.

What is a protostar?

• A protostar is a dense core of gas and dust in the early stage of star formation.
• A protostar is a type of black hole.
• A protostar is a planet that is still forming.
• A protostar is a dying star in the final stage of its life.

What is nucleosyntheses?

• The process by which new atomic nuclei are formed through nuclear reactions.
• The process by which new atomic nuclei are formed through chemical reactions.
• The process by which new atomic nuclei are formed through biological reactions.
• The process by which new atomic nuclei are formed through physical reactions.

Tags

NGSS.HS-ESS1-3

What is hydrostatic equilibrium?

• Balance between gravitational force and pressure force in a fluid or gas
• Balance between gravitational force and centrifugal force in a fluid or gas
• Balance between gravitational force and frictional force in a fluid or gas
• Balance between gravitational force and magnetic force in a fluid or gas

What is a main sequence star?

• A main sequence star is a star that does not emit any light.
• A main sequence star is a star that is made up of only helium.
• A main sequence star is a star that is about to explode.
• A main sequence star is a star that is in the longest and most stable phase of its life cycle, where it fuses hydrogen into helium in its core.

Tags

NGSS.HS-ESS1-1

What is synchronous rotation?

• Rotation period faster than orbital period
• Rotation period not matching orbital period
• Rotation period slower than orbital period
• Rotation period matching orbital period

What is a gibbous moon?

• A gibbous moon is a phase of the moon where only a quarter of the moon is illuminated by the sun.
• A gibbous moon is a phase of the moon where more than half, but less than full, of the moon is illuminated by the sun.

• A gibbous moon is a phase of the moon where the moon is completely dark.
• A gibbous moon is a phase of the moon where the moon is fully illuminated by the sun.

Tags

NGSS.MS-ESS1-1

What is a crescent moon?

• A crescent moon is a phase of the moon where more than half of the moon is illuminated and it appears as a curved shape resembling a crescent.
• A crescent moon is a phase of the moon where the entire moon is illuminated and it appears as a full circle.
• A crescent moon is a phase of the moon where only a small portion of the moon is illuminated and it appears as a straight line.
• A crescent moon is a phase of the moon where less than half of the moon is illuminated and it appears as a curved shape resembling a crescent.

Tags

NGSS.MS-ESS1-1

What is the equinox?

• The equinox is a phenomenon that happens when the Earth's axis is tilted towards or away from the Sun.
• The equinox is a type of astronomical event that occurs when the Moon is closest to the Earth.
• The equinox is the moment in which the plane of Earth's equator passes through the center of the Sun, resulting in equal lengths of day and night.
• The equinox is a term used to describe the alignment of the planets in the solar system.

Tags

NGSS.MS-ESS1-1

What is a solstice?

• A solstice is a weather phenomenon that causes extreme heat.
• A solstice is a type of rock formation.
• A solstice is when the sun is at the greatest distance from the equator.

• A solstice is a traditional dance performed during the summer.

Tags

NGSS.MS-ESS1-1

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