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jumper

Primary Information
Secondary Information

Definition

A jumper is a garment that covers the torso and arms. It is typically made of a soft, stretchy material, such as cotton or polyester. Jumpers are often worn for casual occasions, such as playing sports or going to the park. However, they can also be worn for more formal occasions, such as job interviews or weddings.

How can the word be used?

My jumper is the same colour at the furniture.

jumper

Different forms of the word

Noun:

  • A jumper is a type of garment that is typically worn over a shirt or blouse. It is usually made of knit fabric and has long sleeves.
  • A jumper is also a type of electrical connector that is used to join two wires together.

Etymology

When used to describe a garment: The word "jumper" as a garment is thought to have come from the British English word "jump", which means to move quickly or suddenly. Jumpers are typically made of knit fabric and have long sleeves, which allows for them to be easily pulled over the head.

Question

When are you likely to wear a jumper?

AQA Science Exam Question and Answer

Question:

How does the design of a jumper contribute to its insulating properties and suitability for different weather conditions? Explain the scientific principles behind the materials and structure that make jumpers effective in regulating body temperature.

Answer:

The design of a jumper plays a crucial role in its insulating properties and adaptability to varying weather conditions. Scientific principles related to materials and structure contribute to the jumper's effectiveness in regulating body temperature.

Jumpers are typically made from materials like wool, fleece, or synthetic fibres that have high thermal resistance. These materials trap air pockets within their fibres, creating a layer of insulation. Air is a poor conductor of heat, so this trapped air acts as a barrier that prevents heat loss from the body to the surrounding environment.

The structure of the jumper also matters. Knitted or woven patterns can affect the flexibility and thickness of the fabric, which impacts its insulation ability. For instance, closely-knit jumpers reduce the amount of air movement and heat loss, enhancing warmth.

The adaptability of jumpers to different weather conditions lies in their ability to trap or release heat as needed. In cold weather, the insulation properties of the jumper keep body heat from escaping. In warmer conditions, jumpers made from breathable materials allow excess heat and moisture to escape, preventing overheating.

Overall, a well-designed jumper takes advantage of scientific principles related to thermal resistance, air trapping, and material properties to provide effective insulation and thermal regulation. This knowledge enables us to choose the right jumper for specific weather conditions, ensuring comfort and maintaining body temperature.