An astronomical unit is defined as the distance between the

• earth and the moon.

• sun and the moon.

• sun and Mercury.

• earth and the sun.

The sun is composed mostly of

• helium.

• hydrogen.

• oxygen.

• sodium.

The sun’s surface exists in what state of matter?

• plasma

• solid

• liquid

• gas

Which of the following is not a part of the solar atmosphere?

• chromosphere

• radiative zone

• prominence

• spicules

Of what high-speed particles is the solar wind mostly composed?

• neutrons

• muons

• protons and electrons

• neutrinos

Compared to the temperature of the photosphere, the temperature of the corona is

• lower.

• equal.

• higher.

• much higher.

Which of the following does not belong with the others?

• core

• radiative zone

• convective zone

• corona

In what part of the sun are thermonuclear reactions believed to occur?

• radiative zone

• core

• photosphere

• chromosphere

Tags

NGSS.HS-ESS1-1

Severe solar storms that can disrupt telecommunications on Earth are called

• solar flares.

• solar winds.

• spicules.

• sunspots.

Compared to the earth, the average density of the moon is

• the same.

• less dense.

• slightly denser.

• much denser.