Activity 2

Question 1

Bodies of water with less to none saline water

Answer 1

Freshwater ecosystems

Question 2

Ecosystems with running water such as rivers and streams

Answer 2

Lotic ecosystems

Question 3

How are freshwater ecosystems characterized?

Answer 3

Through their physical, chemical and biological properties.

Question 4

Freshwater ecosystems with still water

Answer 4

Lentic ecosystem

Question 5

What is involved in the process of monitoring?

Answer 5

Evaluation of physical, chemical, biological properties regularly

Question 6

2 types of freshwater ecosystem

Answer 6

1. Lentic
2. Lotic

Question 7

What is the important thing that students must do in all ecological studies before doing the actual study?

Answer 7

Ocular inspection/Reconnaissance of the study site

Question 8

How many percentage should the sampling area be of the total area of the study site?

Answer 8

10-20%

Question 9

What are sampling points?

Answer 9

Particular points where the specific samples are to be taken

Question 10

For rivers and streams, sampling point can be determined as?

Answer 10

Upstream, midstream, and downstream

Question 11

After establishing the site, what are students expected to do?

Answer 11

Students are expected to collect water sample to determine the physical characteristics of the water

Question 12

For rivers and streams water sampling must be taken from…

Answer 12

Starting from downstream, middle stream and upstream..

Question 13

Water sample must be taken while the water is still ____

Answer 13

Undisturbed

Question 14

Steps in getting water sample

Answer 14

1. Rinse a 1L bottle and its cap with pond water
2. Dip the covered 1L bottle into the water. Once submerged, remove the cap to collect water.
3. When full, replace the cap while still under water then lift up.

Question 15

Water samples to be examined must be stored in? and until?

Answer 15

Ice chest and not more than 24 hours

Question 16

For ph, how long is the duration of storage

Answer 16

Within 8 hours

Question 17

How long is the duration of storage for alkalinity?

Answer 17

Up to 14 days

Question 18

How much of the water samples should be collected for suspended solids?

Answer 18

1L

Question 19

How much of the water samples should be collected for chemical characteristics?

Answer 19

2 of 1L

Question 20

How much of the water samples should be collected for DO?

Answer 20

2 of 300 ml

Question 21

What are the physical characteristics/ parameters

Answer 21

1. Color
2. Temperature
3. Depth
4. Transparency
5. Suspended solids

Question 22

What causes the color in water

Answer 22

Caused by the presence of minerals such as iron and manganese or by substances of vegetable origin such as algae and weeds

Question 23

What indicates the intensity of heat in a body of water

Answer 23

Temperature

Question 24

Depth

Answer 24

Perpendicular measurement downward from the surface

Question 25

Water transparency

Answer 25

Due to light penetration in warer.

Question 26

In water transparency, yellow-green us due to?

Answer 26

High concentration of dissolved organic materials

Question 27

What tool measures light transparency

Answer 27

Secchi disk

Question 28

What are suspended solids?

Answer 28

Tiny particles suspended in a body of water that may affect the clarity of water

Question 29

Causes of suspended solod

Answer 29

Soil erosion, or water contaminant from sewage system

Question 30

What is the title of activity 2

Answer 30

Physical characteristics of fresh water ecosystems