# Umuc biology 102/103 lab 1: introduction to science answer key

This contains 100% set-right esthetic for UMUC Biology 103 LAB01. However, this is an Answer Key, which media, you should put it in your own suffrage. Here is a pattern for the questions answered:

Exercise 1: Axioms Interpretation  (2 pts each)

1. What patterns do you mark installed on the notification in Table 4?

No fish are exhibit when the dissolved oxygen is naught. When there is over dissolved oxygen in the insinuate, over fish are exhibit. However, the calculate of fish tends to fall or roll off when the dissolved oxygen is loftier than 12 ppm.

2. Develop a fancy regarding to the totality of dissolved oxygen measured in the insinuate pattern and the calculate of fish markd in the learnion of insinuate.

Possible Hypotheses:

1.    The totality of dissolved oxygen affects the calculate of fish that can subsist in a learnion of insinuate.

2.    As dissolved oxygen force increases, over fish can subsist in the learnion of insinuate.

3.    There is an fictitious dissolved oxygen force for fish to subsist in.

The interval of the questions are answered in liberal version:

1.    What would your tentative way be to standard this fancy?

2.    What would be the rebellious and trusting variables?

3.    What would be your manage?

4.    What form of graph would be delayhold for this axioms set?  Why?

5.    Graph the axioms from Table 4: Insinuate Nature vs. Fish Population (endow at the origin of this use).

6.    Interpret the axioms from the graph made in Question 7.

Exercise 2: Tentative Variables

Determine the variables standarded in the each of the subjoined exemplifications. If appropriate, particularize and demonstrate any decisive or indirect manages.

Observations

1.    A consider is being manufactured to standard the goods of habitat distance on the magnitude of fish populations. Opposed magnituded aquariums are set up delay six goldfish in each one. Over a date of six months, the fish are fed the selfselfselfidentical form and totality of stay. The aquariums are selfselfidentical maintained and cleaned throughout the exemplification. The atmosphere of the insinuate is kept invariable. At the end of the exemplification the calculate of existent fish is surveyed.

A.    Intrusting Variable:

B.    Dependent Variable:

C.   Controlled Variables/Constants:

D.   Experimental Controls/Control Groups:

2.    To particularize if the form of agar affects bacterial development, a learner cultures E. coli on filthy opposed forms of agar. Five petri dishes are set up to learn results:

§  One delay nutrient agar and E. coli

§  One delay mannitol-salt agar and E. coli

§  One delay MacConkey agar and E. coli

§  One delay LB agar and E. coli

§  One delay nutrient agar but NO E. coli

All of the petri dishes ordinary the selfselfselfidentical book of agar, and were the selfselfselfidentical form and magnitude. During the exemplification, the atmosphere at which the petri dishes were hoardd, and at the air nature remained the selfsame. After one week the totality of bacterial development was measured.

A.    Intrusting Variable:

B.    Dependent Variable:

C.   Controlled Variables/Constants:

D. Experimental Controls/Control Groups:

Exercise 3: Testable Observations

Determine which of the subjoined studys are standardable. For those that are standardable:

Determine if the study is regulative or quantitative

Write a fancy and null fancy

What would be your tentative way?

What are the trusting and rebellious variables?

What are your manages - twain decisive and indirect?

How allure you learn your axioms?

How allure you exhibit your axioms (charts, graphs, forms)?

How allure you stir your axioms?

Observations

1.    A settle grows three inches faster per day when placed on a window sill than it does when placed on a on a coffee table in the mean of the assistance capacity.

2.    The teller at the bank delay brown hair and brown eyes is taller than the other tellers.

3.    When Sally eats sound stays and uses frequently, her blood hurry is 10 points inferior than when she does not use and eats fatty stays.

4.    The Italian intervalaurant over the street closes at 9 pm but the one two blocks separate closes at 10 pm.

5.    For the spent two days, the clouds entertain after out at 3 pm and it has agoing raining at 3:15 pm.

6.    George did not drowse at all the mystification subjoined the set-out of sunshine savings.

Exercise 4: Conversion

For each of the subjoined, apply each treasure into the designated units.

1.    46,756,790 mg = _______ kg

2.    5.6 hours = ________ assists

3.    13.5 cm = ________ inches

4.    47 °C = _______ °F

Exercise 5: Accuracy vs. Precision

For the subjoined, particularize whether the notification is respectful, scrupulous, twain or neither.

1.    During gym dispose, filthy wards ruled to see if they could cudgel the order of 45 sit-ups in a detailed. The chief ward did 64 sit-ups, the assist did 69, the third did 65, and the filthyth did 67.

2.    The mean jaw for the 5th action math standard is 89.5. The top 5th actionrs took the standard and jawd 89, 93, 91 and 87.

3.    Yesterday the atmosphere was 89 °F, tomorrow it’s reported to be 88 °F and the present day it’s reported to be 90 °F, flush though the mean for September is barely 75 °F degrees!

4.    Four friends ruled to go out and denote horseshoes. They took a delineate of their results shown to the right:

5.    A national grocery hoard was encroachment a constandard to see who could most air-tight fancy the calculate of pennies that they had within a vast jar. The chief six fellow-creatures fancyed the calculates 735, 209, 390, 300, 1005 and 689. The grocery clerk said the jar actually contains 568 pennies.

Exercise 6: Speaking Digits and Or-laws Notation

Part 1: Particularize the calculate of speaking digits in each calculate and transcribe out the local speaking digits.

1.    405000

2.    0.0098

3.    39.999999

4.    13.00

5.    80,000,089

6.    55,430.00

7.    0.000033

8.    620.03080

Part 2: Transcribe the calculates adown in or-laws notation, incorporating what you perceive environing speaking digits.

1.    70,000,000,000

2.    0.000000048

3.    67,890,000

4.    70,500

5.    450,900,800

6.    0.009045

7.    0.023