The Olden Times
What does radiometric dating help scientists determine about rocks and fossils?
Their age
What are the particles that make up the nucleus?
protons & neutrons
What is the difference between a protostar and a star?
A protostar is not doing fusion and a star is.
Describe what a plant needs to do photosynthesis.
Sunlight, water, and carbon dioxide.
What was one effect of the early Earth being bombarded by asteroids and comets?
It added mass to the planet, increasing its gravity. It caused the planet to be molten.
What can radiometric dating tell us about the Hawaiian Islands?
The ages of the volcanic rocks on each island
Which is larger, the atomic mass or the atomic number?
The atomic mass
What process occurred in the centers of stars that resulted in the creation of elements on the periodic table?
Nuclear fusion
What is the main product of photosynthesis?
Glucose
Where did the material that became the moon come from?
A protoplanet (Theia) smashed into the Earth.
Which decays slower, uranium 236 or carbon 14?
uranium 236
What is the charge of an electron?
negative
Describe how the planets of the solar system formed
They formed from a nebular cloud of dust and gas.
What are the gasses the go into to a plant and what are the gasses that come out during the light dependant part of photosynthesis?
Carbon dioxide goes in and oxygen come out.
Why are larger planets better at holding on to lighter gases?
Larger planets have stronger gravity to hold onto lighter gasses.
What is the main assumption made in radiometric dating?
That the decay of radioactive isotopes is a steady rate
What is the charge of a neutron?
neutral
Where does the solar wind come from?
Fusion in the sun.
In which part of the plant does photosynthesis primarily occur?
The leaves (chloroplast)
Describe the Hadean Eon.
Earth was molten and was struck by Theia.
What is the main assumption made in radiometric dating?
That the decay of radioactive isotopes is a steady rate
If an atom has an atomic number of 3 and an atomic mass of 7, how many neutrons will it have?
4
Why are the inner planets rocky and the outer planets are gases?
The solar wind.
What is the name of the light independant cycle in photosynthesis?
The Calvin Cycle
Describe accretion
The process of growth or increase, typically by the gradual accumulation.