Science Test Paper

Subject: Science Class:  IX
Time: 30 minutes Marks: 25
Answer Key
1    Chose the correct option. 
The parts of neuron which receives messages are:
cell bodies
dendrites
axons
nuclei
Sensory neurons carry messages towards:
muscles
muscles & glands
sense organs
brain & spinal cord
The part of body which filters wastes from blood:
liver
kidney
intestine
stomach
Chromosomes are made up of:
DNA only
Proteins
DNA, proteins & fats
DNA & proteins
The characters which are passed from parents to offspring:
Inheritable characters
Non-Inheritable characters
Environmental characters
Natural characters
In humans, a sperm has 23 chromosomes. Egg cell has:
23 chromosomes
46 chromosomes
no chromosomes
69 chromosomes
Zygote is formed by the fusion of:
Two sperm cells
Two egg cells
Two somatic cells
Sperm cell & egg cell
The SI unit of pressure:
Watt
Joule
Pascal
newton
The speed of sound in air is  about:
130 m/s
230 m/s
330 m/s
430 m/s
Q.2. Fill in the blanks.
Central nervous system consists of brain and spinal cord.
Accumulation of salts in kidneys results into kidney stones.
The chemical reaction during which heat is evolved is called exothermic reaction.
The transmission of characters from parents to offspring is called heredity.
The basic physical and functional unit of heredity is called gene.
The characters which are transmitted to next generation are called inheritable characters.
The force which acts normally per unit area is called pressure.
The SI unit of pressure is Nm-2.
The water pressure in a vessel increases with the increase in depth.
The products using ‘sol’ systems are called aerosols.