lab test 1 ch 1

Question 1

what are students expected to do when they first arrive at the lab?

Answer 1

submit lab report

Question 2

What work must be completed and how is it submitted in order to earn points for individual labs?

Answer 2

lab reports, online quiz

Question 3

Are there makeups for unexcused missed work?

Answer 3

no

Question 4

What are two important aspects of being a good lab partner?

Answer 4

cooperation and communication

Question 5

What is the name of the cleaner used on the benches and other surfaces?

Answer 5

CAVICIDE

Question 6

Seven Precautions one should take whenever handling any body fluids

Answer 6

1. assume everyone is infectious
2. cover cuts
3. wear gloves only once
4. wash hands for 20 sec in soap and hotter
5. clean up
6. discard garbage, biohazard in orange bins
7. wash clothes

Question 7

Scanning electron microscope

Answer 7

size of whole room, used to examine surface of specimen, specimen treated with radioactive substance and then the microscope scans with an electron beam. Can magnify up to millions of times

Question 8

transmission electron microscope

Answer 8

used electrons like scanning microscope to produce images, magnifies internal structures of cells, specimen must be cut with diamond knife

Question 9

compound or light microscope

Answer 9

our microscope, can only see large intracellular structures, clusters of cells and examination of tissues.

Question 10

charged atoms or molecules are called

Answer 10

ion

Question 11

an atom that gains electrons will have a/an (positive or negative charge)

Answer 11

negative

Question 12

solution

Answer 12

solute- dissolves in solute

solvent- water is universal solvent

Question 13

the liquid part of a solution is called:

Answer 13

solvent

Question 14

solutes move from a place of higher to lower concentration by this process

Answer 14

diffusion

Question 15

If beaker A has 200 molecules in 1 liter of solution and beaker B has 100 molecules in 1 liter, which is the less concentrated solution, A or B?

Answer 15

B

Question 16

Cell membranes are made up of a bilayer of these molecules

Answer 16

phospholipids

Question 17

if a cell membrane allows the passages of a substance through it, it is said to be__ to that substance.

Answer 17

permeable

Question 18

osmosis

Answer 18

the process of the movement of water across a membrane is called

Question 19

One ____ of any chemical substance contains exactly 6.02 x 10^23 atoms or molecules of that substance.

Answer 19

mole

Question 20

to weigh out 1 mole of a substance, one would weigh out the molecular mass in these units.

Answer 20

g/mol

Question 21

the solution concentration reflecting the number of moles per liter of solution is called: (the measurement, not the units)

Answer 21

molarity

Question 22

The atomic mass of oxygen and hydrogen are:

Answer 22

O = 16 amu
H = 1 amu

Question 23

The molecular mass of sodium hydroxide (NaOH) is:

Answer 23

39.997 g/mol