What is the most basic unit of an element on the periodic table
question 1 options:

dna

carbon center

atom (which contains protons, neutrons, and electrons)

nucleic acid

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure