Grade 11 Unit 1

Question 1

……. is the process by which scientists approach their work

Answer 1

scientific method

Question 2

an educated guess about what a biologist thinks the explanation of an observation will be.

Answer 2

hypothesis

Question 3

an educated guess as to how the biologist thinks his/her experiment will turn out

Answer 3

prediction

Question 4

the use of scientific research to meet certain human needs

Answer 4

applied science

Question 5

Who carried out experiments to show that the micro-organisms that caused wine and broth to go cloudy came from the air and were not made from the broth itself.

Answer 5

Pasteur

Question 6

Who hypothesised that only flies could produce more flies and predicted that, in his experiment, flies would be found in the open jars, but not in the covered jars.

Answer 6

Redi

Question 7

an experiment in which the only difference between different repeats of the experiment is the different values of the independent variable

Answer 7

fair test

Question 8

To measure volume, you could use:

Answer 8

Syringe, measuring cylinder, pipette, burette

Question 9

T/F
It is nearly always better to measure than to judge.

Answer 9

T

Question 10

How can we try not to use personal judgment?

Answer 10

By using colorimeter and have standard to compare it to

Question 11

Why repeating helps in reliability

Answer 11

To spot anomalous results n to calculate average

Question 12

…….states clearly what is being investigated

Answer 12

title

Question 13

……is often extended to a prediction for the particular experiment

Answer 13

hypothesis

Question 14

…… is an honest assessment of • the limitations of the procedure

Answer 14

evaluation

Question 15

……….is usually done by identifying by a number the place in the report where other work has been used

Answer 15

acknowledgement

Question 16

……. is being used to collect oxygen gas produced when yeast converts hydrogen peroxide into water and oxygen.

Answer 16

upturned measuring cylinder

Question 17

……. are used for measuring mass

Answer 17

Balances

Question 18

The magnification is not as great as other microscopes, but the image is very clear and allows delicate dissection to be carried out. It is necessary to help to classify new species of insects.

Answer 18

dissecting microscope.

Question 19

This technique of growing plants from just a few cells on special agars in Petri dishes is called …..

Answer 19

micropropagation

Question 20

Variables over which the experimenter has no control

Answer 20

Dependent variable

Question 21

Variables over which experimenter can impose control during experiment

Answer 21

Independent variable

Question 22

Conditions that could affect outcome of experiment

Answer 22

Controlled variables

Question 23

…… is collection of nutrients to grow microorganisms

Answer 23

Nutrient medium

Question 24

Which microscope shows fine details of cell structure

Answer 24

TEM

Question 25

In which microscope is image viewed on type of "television" screen

Answer 25

SEM

Question 26

Which biologist tool is used to separate plant n animals cell

Answer 26

Ultracentrifuge

Question 27

A line that shows the type n change in distribution of vegetation which exists on a line across a habitat

Answer 27

Transect line

Question 28

...... is used to collect or duck small organisms on tree trunk or leaf

Answer 28

Potter(aspirator)

Question 29

In which microscope is image focused on fluorescent screen

Answer 29

TEM

Question 30

. This is because it ‘confounds’ the interpretation of the results

Answer 30

confounding variable

Question 31

You couldn’t be certain that it was the IV producing the changes in the DV because of the presence of the

Answer 31

confounding variable.

Question 32

a factor that can’t be controlled which may influence the result of the experiment

Answer 32

confounding variable