WorksheetsChemicals in life
Total questions: 10
Worksheet time: 5mins
What type of forces allow a gecko to climb walls?
nuclear forces between protons and neutrons
electromagnetic forces between electrons
gravitational forces between masses
Van der Waals forces between molecules that are close together
What characteristic of water molecules allow them to form weak hydrogen bonds with each other?
positive charges
polarity
solubility
covalent bonds
What characteristic of water causes surface tension?
cohesion
ionic bonds
isotopes
suspension
Which of the following is NOT a common macromolecule in the human body?
protein
petroleum
lipids
DNA
What happens when lactic acid increases in the muscles?
pH decreases
pH increases
pH is zero
pH is 100
In the human body, what regulates the pH so that it doesn't get too high or low?
oxygen
carbon
a buffer
molecules
What type of compound releases OH- into solutions?
acid
base
buffer
polymer
What particles combine to form proteins?
amino acids
lipids
carbohydrates
nucleotides
What does the pH scale measure?
the carbon dioxide a person breathes out
the amount of iron in the blood
the concentration of hydrogen ions in a solution
the polarity of molecules
What trace element carries oxygen in the blood?
phosphorus
magnesium
sodium
iron
