The pancreas is an organ in the digestive and endocrine systems. It produces digestive enzymes for breaking down food in the small intestine and releases insulin and glucagon to regulate blood sugar.
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A food chain depicts the transfer of energy in an ecosystem. It starts with producers (plants), followed by herbivores (primary consumers) and carnivores (secondary and tertiary consumers), illustrating the feeding relationships.
Ozone is a molecule composed of three oxygen atoms. It forms a protective layer in Earth’s stratosphere, blocking harmful ultraviolet radiation. Ground-level ozone is a component of smog and can be harmful to health.
Veins are blood vessels that carry deoxygenated blood back to the heart. They have thinner walls than arteries and often contain valves to prevent blood from flowing backward.
A concave mirror curves inward and reflects light. It converges parallel rays to a focal point, enabling real or virtual image formation. Used in applications like makeup mirrors and telescopes.
Sodium is a highly reactive alkali metal with atomic number 11. It’s silver-white, soft, and abundant in nature. It reacts vigorously with water, producing sodium hydroxide and hydrogen gas.
Water hardness is a measure of the concentration of calcium and magnesium ions. It affects soap effectiveness and can lead to scale buildup. Hard water is classified as temporary or permanent.