Download Year 8 Test on Cells

Year 8 Test on Cells
Name________________
1 A student has a microscope with an eye piece of magnification 10 x. His objective
lenses are 5x, 10x, and 40 x. What is the maximum and minimum magnification he can
achieve?
(a) Max =400x
Min = 5x
(b) Max =400x
Min = 50x
(c) Max =50x
Min = 15x
(d) Max =50x
Min = 10x
2 How many guard cells can you see in this picture?
(a) 1
(b) 5
(c) 10
(d) 24
3 The structures marked A would best be called
(a) Stomates
(b) Lining or Epithelial Cells
(c) Xylem Cells
(d) Support Cells
4 Which sentence below correctly distinguishes tissues organs and cells?
(a) Tissues are made up of organs which contain cells
(b) Tissues are made up of organs which make up cells
(c) Cells are made of tissues which are made of organs
(d) Cells make up tissues which make up organs
5 Which of the following contains only organelles?
(a) chloroplasts, membranes, nuclei
(b) Stomates, chloroplasts, vacuoles
(c) Nuclei, leaves, vacuoles
(d) stems, leaves, roots
6 Which of the following is not found on a microscope
(a) Stage
(b) Mirror
(c) Subjective
(d) Coarse focus
7 Microscopes are not responsible for the discovery of
(a) the discovery of virus
(b) the discovery of organelles
(c) the discovery of cells
(d) the discovery of black holes.
8 Xylem and Phloem are both
(a) Organelles
(b) Plant organs
(c) Transport tissues
(d) Support tissues in a plant
8
9 Look at the diagram below. Label all the parts
A _______________________
B _______________________
C ______________________
D _______________________
4
10 Part D on the microscope is not set up correctly. Describe what needs to be done and
why.
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1
11 For each problem below suggest the best solution.
Problem
Solution
The image is out of
focus
The image is too small
The image is too dark
The object you want to
see is too far to the left
of your vision
4
12 A student makes a wet mount. The result looks like this. What has the student done
wrong?.................................................................
.............................................................................
.............................................................................
.............................................................................
2
13 (a) the following diagram has the parts of a cell labeled.
c
a
d
e
b
f
Next to each name state the letter that is pointing to that structure
Vacuole
Nucleus
Cell Wall
Cell membrane
Chloroplast
Cytoplasm
6
(b) Give two pieces of evidence that suggests this is a plant cell.
.........................................................................................................................................
.......................................................................................................................................2
(c) Why are no mitochondria showing in this cell? ........................................................
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14 In what organ are these tissues found? ___________________
Name
Cell A ________________
Tissue B _______________
Structure C_____________
Structure D_____________
The cells at B need carbon
dioxide. Show using arrows how
this gas gets to the cells.
6
15 Name 4 different types of cells found in a human leg.
____________ _____________ ____________ ____________
2
16 Name 4 types of tissue in a human.
_____________ _______________ _______________ ____________
2
17 Name 4 organs in a human.
____________ ______________ ____________ __________
2
18 Name 4 body systems in a human.
____________ ______________ ____________ __________
2
19 Name 2 useful microorganisms.
2
20 Name 2 harmful microorganisms.
2
21 Explain the difference between
(a) Organs and Organelles ..............................................................................................
.......................................................................................................................................2
(b) Multicellular and Unicellular organisms ...................................................................
.........................................................................................................................................
.......................................................................................................................................2
(c) Microscopes and telescopes ......................................................................................
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21 The table below shows how many bacteria will exist after 4 hours if they divide at
optimum rate of once every 30 minutes. Complete the table and graph the results on the
grid provided below making a line graph. Remember do your graph in pencil.
time (hr)
0
0.5
1
1.5
2
2.5
3
3.5
Number of Bacteria
1
2
4
8
16
32
6
1
2
Time (hrs)
3