Download Microscope and Cells

Year 8 Science Homework
Name: ___________________
Form: ________
Homework No: _______
Due date: ________________
Grade: _______
Title: Looking at Microscope
Frequently called
"Stereomicroscopes" or "Dissection
microscopes", these lower power
instruments feature a large stage
for closer viewing of the nonmicroscopic world. Tiny insects
become monsters, flaws in
gemstones & coins obvious, and
pulling a splinter like pulling a nail.
1. Give two differences between a normal light microscope and a
stereomicroscope.
____________________________________________________________
____________________________________________________________
____________________________________________________________
2. From the list below, choose the names of
the parts of the microscope labeled A,
B,E, J, F, L, M and D.
eyepiece lens ______
focusing knob ______
mirror/ light ______
body tube ______
base
______
objective lens ______
arm
______
stage _______
3. Which the diaphragm in the diagram.
Describe this structure and its function.
4. Suzie looked at the letter F under the
microscope. What would she see?
a)
b)
c)
d)
5. Some of the statements below are false. Rewrite the false statements to
make them correct.
a) A x40 lens is of lower power than a x10 lens
__________________________________________________________
b) One should carry a microscope by its body tube using one hand.
__________________________________________________________
c) You should first use the lower power objective lens to view a specimen.
__________________________________________________________
d) Another slide is used to cover the slide with the specimen to flatten the
specimen and prevent the liquid from touching the objective lens.
__________________________________________________________
__________________________________________________________
6. Complete the table
Eyepiece lens
Objective lens
Magnification
5x
10x
10x
40x
10x
200 times
7. A tiny bug 0.5 mm long was viewed under a microscope. How big would
the bug would look if a x5 eyepiece and a x10 objective was used.
__________________________________________________________
8. Label the diagram of the following plant cell. Chloroplast, Nucleus,
Cytoplasm, Cytoplasm, Vacuole, Cell membrane
9. Give 3 differences between a plant and an animal cell.
__________________________________________________________
__________________________________________________________
More about Cells
1. What are the basic units of Living things?
2.
________________________________________________________________________
Name 5 different types of cells in the human body.
3.
________________________________________________________________________
Draw a line diagram of the cheek cells show and label the 3 basic structures of cells.
4.
What is protoplasm? What is it consisting of?
________________________________________________________________________
5.
________________________________________________________________________
What controls the flow of substances in and out of a cell?
6.
________________________________________________________________________
Give 2 functions of the nucleus.
________________________________________________________________________
________________________________________________________________________
7.
________________________________________________________________________
Which 3 extra structures can be found in a plant cell?
8.
________________________________________________________________________
What do chloroplasts contain? Why?
________________________________________________________________________
9.
________________________________________________________________________
What does vacuole contain?
________________________________________________________________________
10. What is the use of vacuole?
________________________________________________________________________
11. What is tissue? What is the name given to a group of tissues that do one particular job?
________________________________________________________________________