Pearson Biology Chapter 2.1-2.2 Quiz

How do scientists begin their work?

• Testing a hypothesis

• creating experiments

• careful observation

• drawing conclusions

How many variables does a scientist test when designing an experiment

• only 1

• 2 variables, duh!

• all of the variables

• none of the variables

Who reviews articles during peer review?

• fellow students

• friends of the scientist

• the people who paid for the experiment

• anonymous experts in the field

How do organisms keep everything within normal limits?

• evolution

• homeostasis

• carefully

• they do not normally have a problem with this

if an atom contains 3 protons, 5 neutrons and 3 electrons, what would its mass number be?

• 3

• 6

• 8

• 11

If an isotope contained 4 protons, 5 neutrons and 6 electrons what would its name be?

• Beryllium - 9

• Beryllium - 10

• Carbon - 11

• Carbon - 10

What is an isotope?

• Same number of neutrons, different number of electrons

• Same number of protons, different number of electrons

• Same number of electrons, different number of protons

• Same number of protons, different number of neutrons

When you combine two or more elements in definite proportions, you make

• chemical compound

• isotope

• ion

• Enzyme

If an atom contains 23 protons, 23 electrons and 20 neutrons, what is its atomic number?

• 46

• 43

• 23

• 66

What term does not apply to sodium chloride (think ionic bond)

• molecule

• ionic bonding

• compound

• crystal