Which is a secondary substance? A.) Tree falling B.) Volcanic eruption C.) Forest fire D.) Snow melting

Why do individual water masses within the oceans retain distinctive physical properties for long periods?

Instead of defining life, scientists have decided to

Which of these is not a way that we will be using to determine the pH of a solution? a) pH paper b) Bromothymol blue c) Mass number d) Phenolpthalein

How are viruses different from bacteria

It is possible to determine a person's exact date of birth from their bones. True or false

Change: A logging company promises to plant five trees for every one it cuts down. What is the effect?

Taxonomy is: a. a very recent science b. not a science c. a very old science d. an exact science

Cleocin suspension is available in a concentration of 75 mg/5 ml. how many ml are required for a 300 mg dose?

Chemical analysis indicates that the cell membrane is composed mainly of: 1) proteins and starch 2) proteins and cellulose 3) lipids and starch 4) lipids and proteins

How many nucleotides are in 12 mRNA codons? 12 24 36 48