Author: Study Clue

A strip of paper may not burn in a room with very low oxygen mainly because the fire triangle lacks

When a substance burns in air and forms new substances with heat and light, it is called A Freezing process

In a kitchen stove, the “fuel” is the substance that A Stops the fire B Burns to give heat C

Combustion is best described as A Cutting metal sheets B Freezing water fast C Dissolving salt D Burning in oxygen

A village runs a biogas plant but still calls it “renewable”; which key reason makes biogas renewable compared to petrol

A town shifts its streetlights from coal-based electricity to solar panels; which resource category is being increased in use A

When we say a resource is “renewable,” it usually means the resource can be replaced by nature within A A

A student says, “This resource finishes if overused and takes millions of years to form again.” Which category fits best

Natural resources that can be replaced naturally in a short time are called A Non-renewable resources B Metallic minerals C

A student adds salt to ice to cool a drink quickly; which idea best explains the extra cooling? A Heat