Explain why it is difficult to give an accurate count of the ...

[Evvie72]

Explain why it is difficult to give an accurate count of the number of species that go extinct each year.
 
  What will be an ideal response?

Question 2

What is a catalyst?
 
  What will be an ideal response?

[fwbard]

Answer to Question 1

This is difficult because many species go extinct every year without us ever knowing they existed. Furthermore, extrapolating from small scales to large scales can introduce inaccuracies, and estimating species loss from extinction rate and number of species is inaccurate because neither extinction rate nor the number of species is well constrained.

Answer to Question 2

A catalyst is a molecule (or substance) that speeds up a reaction without itself being consumed.

[Evvie72]

TYSM

[parshano]

Thanks for the timely response, appreciate it