Year 8 Cells Quiz Hands on Heads, Hands on Tails Activity

1. TrueTrue Hands on HeadsHands on Heads
FalseFalse Hands on HipsHands on Hips
Sit down when you get a question wrongSit down when you get a question wrong

2. • 1.1. A micrometre is 1/1000A micrometre is 1/1000thth
of aof a
metre.metre.
Yes it is! Things that are measured inYes it is! Things that are measured in
micrometres are very small indeed!micrometres are very small indeed!

3. • 2.2. Nanometres are larger thanNanometres are larger than
micrometres.micrometres.
Nanometres are 1/10000Nanometres are 1/10000thth
of a metre!of a metre!

4. • 3.3. Red blood cells are smaller thanRed blood cells are smaller than
white blood cells.white blood cells.
They are. They are very simple and areThey are. They are very simple and are
flattened in shapeflattened in shape

5. • 4.4. On the microscope pictured, theOn the microscope pictured, the
eyepiece would go into A.eyepiece would go into A.
A

6. • 5.5. You would place a microscopeYou would place a microscope
slide on the objective.slide on the objective.
There are 3 objective lenses onThere are 3 objective lenses on
the revolving nosepiece. Usuallythe revolving nosepiece. Usually
they are just called ‘objectives’.they are just called ‘objectives’.

7. • 6.6. On the microscope, theOn the microscope, the
diaphragm is used to focus adiaphragm is used to focus a
specimen.specimen.
No! The diaphragm controls theNo! The diaphragm controls the
amount of light passing through theamount of light passing through the
specimen.specimen.

8. • 7.7. Light passes through 3 lensesLight passes through 3 lenses
when focussing on a specimen.when focussing on a specimen.
Light passes through 2 lenses: the oneLight passes through 2 lenses: the one
in the eyepiece and an objective lens.in the eyepiece and an objective lens.

9. • 8.8. A cover slip is placed on top ofA cover slip is placed on top of
the specimen.the specimen.
Absolutely! The specimen and a drop ofAbsolutely! The specimen and a drop of
water is placed on the microscope slide,water is placed on the microscope slide,
then the cover slip is dropped on top.then the cover slip is dropped on top.

10. • 9.9. A pipette is used to apply a dropA pipette is used to apply a drop
of water to a specimen on aof water to a specimen on a
microscope slide.microscope slide.

11. • 10.10. When a specimen is observedWhen a specimen is observed
through a microscope its image appearsthrough a microscope its image appears
upside down and back to front.upside down and back to front.
Absolutely! This is because of the wayAbsolutely! This is because of the way
light travels through the 2 lenses.light travels through the 2 lenses.

12. • 11.11. The 3 objectives haveThe 3 objectives have
magnifications of x4, x10 and x100.magnifications of x4, x10 and x100.
They are x4, x10 and x40.They are x4, x10 and x40.

13. • 12.12. The eyepiece has aThe eyepiece has a
magnification of x10. If a x4magnification of x10. If a x4
objective is used the totalobjective is used the total
magnification will be x400.magnification will be x400.
The total magnification equals theThe total magnification equals the
magnification of the eyepiece X themagnification of the eyepiece X the
magnification of the objective. In thismagnification of the objective. In this
case it will be 4 X 10 = 40.case it will be 4 X 10 = 40.

14. • 13.13. Methyl blue stain is used toMethyl blue stain is used to
see a cellsee a cell’s nucleus more clearly.’s nucleus more clearly.
The nucleus stains dark blue withThe nucleus stains dark blue with
methyl blue.methyl blue.

15. • 14.14. You can see the cell wall ofYou can see the cell wall of
an onion cell using a lightan onion cell using a light
microscope.microscope.
With a stain, you can see the nucleusWith a stain, you can see the nucleus
and the geometric cell wall very clearly.and the geometric cell wall very clearly.

16. • 15.15. A hypothesis is a prediction ofA hypothesis is a prediction of
the outcome of an experiment.the outcome of an experiment.
Absolutely! It is how you apply yourAbsolutely! It is how you apply your
understanding of the theory to how youunderstanding of the theory to how you
think the experiment will go.think the experiment will go.

17. • 16.16. The cell wall lies inside theThe cell wall lies inside the
cell membrane.cell membrane.
No the cell wall is a thick structure thatNo the cell wall is a thick structure that
lies outside the cell membrane andlies outside the cell membrane and
supports the cell.supports the cell.

18. • 17.17. Cytoplasm is mostly water.Cytoplasm is mostly water.
Yep and some dissolved salts.Yep and some dissolved salts.

19. • 18.18. Chloroplasts can be foundChloroplasts can be found
in plant and animal cells.in plant and animal cells.
No way, enzymes cause chemicalNo way, enzymes cause chemical
digestion.digestion.

20. • 19.19. Chloroplasts convertChloroplasts convert
sunlight to sugar.sunlight to sugar.
Plants use this sugar to grow.Plants use this sugar to grow.

21. •20.20. Chloroplasts moveChloroplasts move
around the cell.around the cell.
In a process called cytoplasmicIn a process called cytoplasmic
streaming.streaming.

22. • 21.21. The activities of all cells areThe activities of all cells are
controlled by their nucleus.controlled by their nucleus.
Just like the brain controls our bodies.Just like the brain controls our bodies.

23. •22.22. Mitochondria releaseMitochondria release
energy for cellsenergy for cells’ activities.’ activities.
Absolutely! They are the cell’sAbsolutely! They are the cell’s
powerhouse.powerhouse.

24. • 23.23. Ribosomes are theRibosomes are the
workbenches upon whichworkbenches upon which
proteins are made.proteins are made.
Absolutely! They are found loose in theAbsolutely! They are found loose in the
cytoplasm and on endoplasmiccytoplasm and on endoplasmic
reticulum.reticulum.

25. • 24.24. Endoplasmic reticulumEndoplasmic reticulum
are responsible for recyclingare responsible for recycling
waste materials.waste materials.
Endoplasmic reticulum is the cell’sEndoplasmic reticulum is the cell’s
transport system.transport system.

26. • 25.25. Vacuoles are usuallyVacuoles are usually
small in plant cells.small in plant cells.
Plant cells usually contain a largePlant cells usually contain a large
vacuole, animal cells a small one.vacuole, animal cells a small one.

27. • 26.26. Lysosomes are the cellLysosomes are the cell’s’s
recycling units.recycling units.
Absolutely! They take worn out cellAbsolutely! They take worn out cell
components and break them downcomponents and break them down

28. • 27.27. Golgi make waterGolgi make water
available to the cell.available to the cell.
They are involved in repackagingThey are involved in repackaging
proteins for transport out of the cell.proteins for transport out of the cell.

29. • 28.28. Plant and animal cellsPlant and animal cells
contain ribosomes.contain ribosomes.
Absolutely! They both make proteins.Absolutely! They both make proteins.

30. • 29.29. Plant and animal cellsPlant and animal cells
both have cell membranes.both have cell membranes.
Absolutely! Plant cells have an extraAbsolutely! Plant cells have an extra
layer called the cell wall.layer called the cell wall.

31. • 30.30. The cell wall controls theThe cell wall controls the
passage of materials in and outpassage of materials in and out
of the cell.of the cell.
The cell membrane does. The cell wallThe cell membrane does. The cell wall
lends the cell strength and support.lends the cell strength and support.