Science - Grade 7
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Sound Waves MCQs
Sound waves are a type of mechanical wave that travel through a medium such as air, water, or solids. They are produced when an object vibrates, causing the surrounding particles to move. These particles collide with nearby particles, passing the energy along in the form of a wave.
Added: April 10, 2026
Wave Interactions
Waves interact with materials and with other waves in different ways. These interactions help scientists understand how energy moves and behaves. The main types of wave interactions include reflection, refraction, diffraction, and absorption.
Added: April 5, 2026
Electric Force – MCQ Worksheet
Electric force is a fundamental, non-contact interaction that causes electrically charged objects to attract or repel each other. It is produced by electric charges (electrons and protons) and strength depends on the magnitude of charges and their distance.
Added: March 27, 2026
Electricity and Magnetism
Electricity and magnetism are closely related forces that are part of everyday life. Electricity is the flow of electrons through a material, usually a conductor such as a metal wire. This movement of electrons is called an electric current and is used to power devices like lights, phones, and appliances.
Added: March 26, 2026
Cell Structure
Cells are the smallest units of life capable of carrying out all vital functions. Whether you’re studying biology for school or simply curious about how living things work, understanding cell structure is essential. Every organism—from tiny bacteria to giant trees and humans—is made of cells, and each cell contains specialized parts that work together like a well-organized factory.
Added: February 20, 2026