Question: Q: What causes nitrate to go back to its gaseous nitrogen state? A:
OPTIONS:
- phytoflagellate bacteria
- decomposers
- enzymes
- denitrifying bacteria
Answer: denitrifying bacteria

input with options: Q: What causes waves to bring sand up onto the beach during summers? A:
OPTIONS:
- no energy
- high energy
- low sand density
- low energy
output: low energy

Q: Q: Unlike eukaryotic cells, dna and rna synthesis in prokaryotic cells occurs together with synthesis of what? A:

OPTIONS:
- membrane
- fruit
- mutation
- protein

A: protein

input: OPTIONS:
- voltage
- frequency
- mass
- amplitude Now, answer this question: Q: Circular water waves decrease in what property as they move away from where a rock is dropped? A:
A:
output: amplitude

Q: What kind of energy used heat from magma within the earth to heat homes or produce steam that turns turbines? A:

OPTIONS:
- thermal energy
- robust energy
- renewable energy
- geothermal energy

Answer: geothermal energy

Q: Q: What is a layer of saturated porous rock? A:

OPTIONS:
- a shear
- an overhang
- a quarry
- an aquifer

A:
an aquifer