How many atoms are in a mole?
a) 6.022 x 10^23
b) 6.022 x 10^24
c) 6.022 x 10^25
a) 6.022 x 10^23
What is the scientific term for peeling skin?
a) Desquamation
b) Dermatitis
c) Exfoliation
a) Desquamation
What percentage of animal species are invertebrates?
a) About 50%
b) About 95%
c) About 90%
b) About 95%
What kind of animal is the platypus (Ornithorhynchus anatinus)?
a) Mammal
b) Reptile
c) Amphibian
a) Mammal
How many pairs of ribs does an adult human have?
a) 10
b) 12
c) 8
b) 12
What does nephrology study?
a) The kidneys
b) The liver
c) The blood
a) The kidneys
How many square metres are there in a hectare?
a) Ten thousand
b) One hundred
c) One thousand
a) Ten thousand
