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Biology Grade 8
Test Description: Biology
Instructions: Answer all questions to get your test result.
1) What is a phenomenon
A
An event that happens frequently
B
None
C
An event that when it occurs the cause is unknown or unexplainable
D
An event that only causes disaster
2) What are telescopes
A
an Instrument to measure time
B
A out of space machine
C
None
D
An instrument that magnifies an object
3) What is optical refractive
A
None
B
make items light up
C
Lenses to collect light to make an image
D
Make items seem large
4) What is reflective
A
Uses 2 mirrors to reflect light
B
Burn the light
C
Mirror image
D
none
5) Advantages of Reflective telescope
A
The mirror in the same way
B
All wavelengths reflect off
C
All
D
Does not suffer fromchromatic aberration
6) Advantages of Reflective telescope
A
So it can be made very big
B
None
C
All
D
Support along the back side of the object
7) Advantages of Reflective telescope
A
Refractive of the same size
B
None
C
Cheaper to make than
D
All
8) Advantages of Reflective telescope
A
Deflects off
B
None
C
Light reflects off the object , rather than pass through
D
sun will shine
9) Disadvantages of Reflective telescope
A
Optics need frequent cleaning
B
None
C
All
D
Easy to get objects out of alignment
10) SALT stands for
A
South African LT
B
South African Lime Time
C
South African Large Telescope
D
None
11) SALT is the largest single optical telescope in the southern hemisphere
A
Maybe
B
No
C
True
D
False
12) SALT is situated where?
A
SAAO (South African Astronomical Observatory)
B
SAOA
C
AOSS
D
SOAA
13) Where is SAAO situated
A
In Johannesburg
B
In Sutherland in Northern Cape 400km from Cape Town
C
None
D
Bruma
14) Radio Telescopes
A
Receive waves emitted by objects in space
B
focus on them by means of reflection
C
Increase the range into space
D
All
*select an answer for all questions
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