Science 8 Video Notes
Life in a Drop of Water
1. In what bodies of water can you find freshwater microscopic organisms?
They can be found in every lake, pond, stream and puddle.
2. What are the smallest organisms that can be seen with an ordinary microscope?
Bacteria.
3. Why are bacteria important?
They are an essential food for other micro organisms.
4. What is another important food source for many pond organisms?
Algae.
5. What is the green substance found in most algae?
Chlorophyll.
6. What are clusters of algae called?
Colonies.
7. What are protists that possess flagella called?
Flagellates.
8. Draw an arrow to the eyespot on the euglena. Why is a
euglena's eyespot important? It enables it to find areas of
light.
9. What does protozoa mean?
First animals.
10. Name the two algae shown below.
Volvox
spirogyra
11. What are protozoa which possess cilia called?
Ciliates.
12. Identify these protists as blepharisma, dileptis paramecium or spirostomum
_____________________
_____________________
_______________
___________________
13. What structures in protozoa allow them to take in and expel water?
Contractile vacuoles.
14. Identify these protists as bursaria, didinium, euplotes, stentor and vorticella
_______________
_____________
______________ _______________ _______________
15. How does an amoeba move?
By sending out streams of cytoplasm called pseudopods.
16. What is the name of the bubbles which protozoa form to surround food?
Food vacuoles.
17. In what ways are protists important?
All of them form the bottom of the food chain,
some are responsible for producing most of the air
that we breath, many are used in scientific studies,
and some are carriers of disease.
Science 8 Video Notes
Life in a Drop of Water
1. In what bodies of water can you find freshwater microscopic organisms?
They can be found in every lake, pond, stream and puddle.
2. What are the smallest organisms that can be seen with an ordinary microscope?
Bacteria.
3. Why are bacteria important?
They are an essential food for other microorganisms.
4. What is another important food source for many pond organisms?
Algae.
5. What is the green substance found in most algae?
Chlorophyll.
6. What are clusters of algae called?
Colonies.
7. What are protists that possess flagella called?
Flagellates.
8. Draw an arrow to the eyespot on the euglena. Why is a
euglena's eyespot important? It enables it to find areas of
light.
9. What does protozoa mean?
First animals. (They are protists that behave like animals –
consume other cells.)
10. Name the two algae shown below.
Volvox
spirogyra
11. What are protozoa which possess cilia called?
Ciliates.
12. Identify these protists as blepharisma, dileptis paramecium or spirostomum
Spirostomum
blepharisma
dileptis
paramecium
13. What structures in protozoa allow them to take in and expel water?
Contractile vacuoles.
14. Identify these protists as bursaria, didinium, euplotes, stentor and vorticella
Voticella
didinium
bursaria
euplotes
(not in video)
stentor
15. How does an amoeba move?
By sending out streams of cytoplasm called pseudopods.
16. What is the name of the bubbles which protozoa form to surround food?
Food vacuoles.
17. In what ways are protists important?
 All of them form the bottom of the food chain,
 some are responsible for producing most of the air (oxygen) that we breath,
 many are used in scientific studies,
 and some are carriers of disease.