Class 8 PT II Question Paper 2024-25 Science

PERIODIC TEST
QUESTION
PAPER
PT1 - PT2

BASED P
T A
ER

P
ER
NC

S

SUB- SCIENCE VIII (PT -2)
M M-40
TOTAL TIME -90
1.What is the type of reproduction that involves only one parent?
a) Sexual reproduction. b) Asexual reproduction.
c) Internal fertilization. d) External fertilization
2.What is the function of the ovary in female animals?
a) To produce sperm. b) To produce eggs. c) To carry oxygen
d) To digest food
3.Which hormone is responsible for the development of male
secondary sexual characteristics?
a) Estrogen. b) Testosterone. c) Progesterone. d)
Insulin
4.What is the term for the onset of menstruation in girls?
a) Menopause b) Menarche. c) Ovulation. d) Fertilization
5.Which of the following is NOT a secondary sexual characteristic
in boys?
a) Deepening of voice. b) Growth of facial hair.
c) Development of breasts. d) Broadening of shoulders
6.Sound cannot travel through:
a) Solids b) Liquids. c) Gases. d)
Vacuum
7.The frequency of a sound wave determines its:
a) Loudness. b) Pitch. c) Speed. d) Direction
8.Which of the following is a good conductor of electricity?
a) Distilled water. b) Pure alcohol. c) Lemon juice. d) Vegetable

oil

9.The process of depositing a layer of any desired metal on another
material using electricity is called:
a) Electrolysis. b) Electroplating. c) Electrorefining. d)
Electromagnetism
10.What happens to the bulb in a circuit when the liquid is a poor
conductor of electricity?
a) It glows brightly. b) It glows dimly. c) It does not glow
d) It glows and then stops

Case Study Based Question (3 marks)
Riya is a 13-year-old girl who recently noticed changes in her body,
such as an increase in height, the development of breasts, and the
onset of menstruation. She feels confused and embarrassed to talk
about these changes. Her mother explained that these are natural
changes that occur during adolescence and are due to hormonal
changes in the body.
1.What is adolescence, and why do these changes occur in Riya's
body?
2.What are secondary sexual characteristics? Name two such
characteristics in girls.
3.Why is it important to talk about adolescence and its changes?
Fill in the blanks: (1 marks each)
1.The union of a male gamete and a female gamete is called
__________.
2.The number of vibrations per second is called __________.
3.__________ is a good conductor of electricity, whereas

__________ is a poor conductor.
True false . (4 marks)

1.The speed of sound increases with the increase in temperature.
2.Echo is a result of sound waves being absorbed by surfaces.
3.The anode is the negatively charged electrode during electrolysis.
4.In internal fertilization, the sperm and egg meet outside the
female's body.
Short answers:
1.what is glands and types of gland , explain pituitary gland?
3marks
2.What is menstruation, and when does it typically begin?
2marks
3.What is the relationship between frequency and pitch of sound?
And What is the unit of frequency? 3 marks
4.What is electroplating?and What is the main purpose of
electroplating? 2 marks
Long answer:( 5 marks each)
1.Explain the fertilization and types of fertilization , explain binary
fission with diagram?
2.Explain how sound is produced, how it travels, and its properties
such as pitch, loudness, and speed. And range of hearing?

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