Most stars are made of which elements?

• Hydrogen only

• Hydrogen and Lithium

• Hydrogen and Sodium

• Hydrogen and Helium

Tags

NGSS.HS-ESS1-3

Which of the following list the correct order of the life cycle of massive stars?

• Nebula --> protostar --> main sequence --> red supergiant --> supernova --> blackhole

• Nebula --> protostar --> main sequence --> red giant --> planetary nebula --> white dwarf --> black dwarf

• Nebula --> protostar --> main sequence --> supernova --> red giant --> blackhole

• Nebula --> protostar --> blackhole --> red supergiant --> supernova --> main sequence

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?

• 10

• 20

• 30

What is the mass number of the atom shown in the Bohr model?

• 11

• 12

• 23

• Can't be determined

Tags

NGSS.MS-PS1-1

what group number are the noble gases

• 17

• 18

• 14

• 15

How many Oxygen (O) atoms are in 2C₂HO₈C_l2

• 2

• 16

• 8

• 5

Tags

NGSS.MS-PS1-1

How many molecules of Carbon are in the following formula? 3C₂H₆

• 3

• 6

• 12

• 18

Tags

NGSS.MS-PS1-1

How many elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

What is the net force?

• 5000 N right

• 4000 N right

• 40 N left

• 4000 N left

Tags

NGSS.MS-PS2-2

What law is best described by inertia?

• 1st

• 2nd

• 3rd

• law of conservation of mass