U4 Combined

Question 1

The stages of a star can’t be in a straight line because __________

Answer 1

they have different masses

Question 2

What will the star be after it dies?
If the mass of the star is less than/between/more than ___ then___

Answer 2

less than 10M -> white dwarf
between 10M & 26M -> neutron star
more than 26M -> black hole

Question 3

Life cycle of a star (average star)

Answer 3

Stella nebula -> average star -> red giant -> planetary nebula -> white dwarf -> brown/black drawf

Question 4

Life cycle of a star (massive star)

Answer 4

Stella nebula -> massive star -> red supergiant -> spernova -> neutron star OR black hole

Question 5

biomolecule

Answer 5

covalent compounds (bonding is between non-metal and there’s shared electrons)

Question 6

Carbohydrates are made up of what elements

Answer 6

Carbon, hydrogen, oxygen

Question 7

lipids are made up of what elements

Answer 7

Carbon, hydrogen, oxygen

Question 8

proteins are made up of what elements

Answer 8

Carbon, hydrogen, oxygen, nitrogen

Question 9

nucleic acid are made up of what elements

Answer 9

Carbon, hydrogen, oxygen, nitrogen, phosphorous

Question 10

Earth’s early atmosphere (6)

Answer 10

water vapor (H2O)
Carbon dioxide (CO2)
Nitrogen (N2)
Methane (CH4)
Ammonia (NH3)
Hydrogen Sulfide (H2S)

Question 11

formation of elements

Answer 11

simple molecules
biomolecules
simple organisms