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Science MCQs

Practice multiple choice questions with instant feedback. Select an option to see if you're correct.

Total Questions
2100
Page 206 of 210
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Question 2051 Easy

What are isotopes?

A
Atoms with same protons but different neutrons
B
Atoms with different protons
C
Molecules
D
Different elements
Question 2052 Easy

What is a longitudinal wave?

A
A wave where particles move parallel to the wave direction
B
A wave where particles move perpendicular
C
A wave in water
D
A light wave
Question 2053 Easy

What are lungs?

A
Organs for filtration
B
Organs for breathing
C
Organs for digestion
D
Organs for pumping blood
Question 2054 Easy

What is the mass number?

A
Sum of protons and neutrons
B
Number of protons
C
Atomic number
D
Number of electrons
Question 2055 Easy

What is the Milky Way?

A
A planet
B
A constellation
C
A star
D
Our home galaxy
Question 2056 Easy

What is a nebula?

A
A galaxy
B
A black hole
C
A cloud of gas and dust where stars form
D
A planet
Question 2057 Easy

What is a non-reversible change?

A
A physical change
B
A change that cannot be undone
C
A temporary change
D
A reversible change
Question 2058 Easy

What is the nucleus of an atom?

A
The bond area
B
The central part containing protons and neutrons
C
The outer shell
D
The electron cloud
Question 2059 Easy

What is a nutrient?

A
A type of vitamin
B
A mineral
C
A substance in food that provides energy and materials
D
Water
Question 2060 Easy

What is an ovary?

A
The female sex organ that produces eggs
B
A part of the flower
C
The male sex organ
D
A seed
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