Explanation

• James Prescott Joule established that the various forms of energy, mechanical, electrical and heat, are basically the same and can be changed from one form into another.
• He demonstrated that different forms of energy are interchangeable in his most famous experiment, published in 1845, using a paddle wheel to show that mechanical energy could be changed into thermal energy.

Explanation

• Temperature is the measurement of the hotness or coldness of an object or substance.
• It is a physical property that is usually measured in units of Celsius (°C), Fahrenheit (°F), or Kelvin (K).

Explanation

• A gas is a state of matter that has neither a fixed shape nor a fixed volume.
• It expands to fill its container and takes the shape of its container.
• Gases are highly compressible and can change shape and volume easily.
• Liquid: A liquid has a fixed volume but not a fixed shape.
• Solid: A solid has both a fixed shape and a fixed volume.

Explanation

• Matter is anything that occupies space and has mass.
• It can take many forms, including solids, liquids, gases, and plasma.
• Matter is the physical substance that makes up all objects, living and non-living.

Explanation

• A storeroom is a room or area used for storing goods, supplies, or equipment, and is not a type of environment.
• Environments are typically categorized as natural or human-made and include ecosystems, habitats, and physical surroundings that support life.

Explanation

• Iodine deficiency can cause mental retardation in children.
• Particularly if the deficiency occurs during fetal development or early childhood.
• This is because iodine is essential for brain development and thyroid function.

Explanation

Fruits and vegetables are rich in various vitamins, such as:

• Vitamin C (citrus fruits, strawberries, bell peppers)
• Vitamin A (sweet potatoes, carrots, dark leafy greens)
• Vitamin K (leafy greens, broccoli, cauliflower)
• Folate (dark leafy greens, citrus fruits, legumes)

Explanation

• The word "science" is derived from the Latin word "scientia," which means "knowledge" or "knowing."
• This Latin word is itself derived from the verb "scire," which means "to know."

Explanation

• When we inhale, the air enters the nostrils and passes through the nasal cavity, then travels down the pharynx (throat) and into the trachea (windpipe).
• The trachea divides into two bronchi, one for each lung, and the air then enters the lungs, where oxygen is absorbed into the bloodstream and carbon dioxide is removed.

Explanation

• African elephants have larger ears than Asian elephants.
• African elephants live in the savannas and need protection from the sun.
• So their ears are bigger to help them stay cool.