in the name of god
Science test from 8th and 9th grade, 8th grade, Hajar High School
1- What is the method of reproduction in bacteria and yeast respectively?
A) Splitting in half – sprouting
b) Germination – Splitting in half
c) fragmentation – sporulation
d) sporulation – fragmentation
2- Which of the following organisms reproduce asexually?
a) fish b) almond tree
c) Banana tree d) Frog
3- Fertilization in which of the following animals is different from others? (internally and externally)
a) frog b) snake
c) fish d) pigeon
4- Which option is the sexual reproductive organ of flowering plants?
a) seed b) flower
c) fruit d) root
5- Why the number of births (children) that are the result of external fertilization is much more than the number of births (children) that are the result of internal fertilization?
A) Because they are more at risk
b) Because no one takes care of them
C) because they are eaten by other animals
d) All cases
6- Which of the following options is not one of the components of pistil?
A) Stigma B) Cream
c) Rod d) Ovary
7- What is the electroscope designed for?
A) Detecting that a conductive object is pregnant
b) Determining the type of charge of a conductive object
c) Detecting whether an object is pregnant (conductive or non-conductive)
d) Detecting whether an object is pregnant and its type of charge
8- If the lightning rod is charged and you bring a plastic rod charged with a woolen cloth near its cap, what interpretation will you see in the lightning rods?
A) The open sheets of lightning are opened more
b) The open sheets of the facade are slightly closed
c) The shutters are opened
d) There is no change in the closed sheets of the lightning facade.
9- What is the reason for the impregnation of two bodies when rubbing?
A) The movement of electrons from one object to another
b) The movement of protons from one object to another
c) The movement of neutrons from one object to another
d) the movement of electrons and protons in opposite directions
10- Which of the following substances has free electrons?
a) wood b) pure water
c) Plastic d) Iron
11- What is the reason for the sound of thunder during lightning?
A) Expansion and explosion of air between clouds
b) Dense and cold clouds hitting each other
c) Clouds with opposite charge collide with each other
d) collision of clouds with the same type of charge
12- The unit for measuring the intensity of electric current and the resistance of a consumer, respectively, in which option is correct?
a) volts – amps b) ohms – amps
c) ampere-ohm d) ampere-volt
13- How are the ammeter, ohmmeter, and voltmeter placed in the electric current circuit, respectively?
A) Sequential-parallel-parallel
b) sequential – parallel – sequential
c) Parallel – Parallel – Sequential
d) parallel – sequential – parallel
14- If in an electric current circuit, the ammeter shows 0.3 amps and the voltmeter shows 3 volts, what is the resistance of the lamp?
a) 100 ohms b) 100 watts
c) 200 ohms d) 50 watts
Good luck, my hardworking girl
Question: Nowruz