Science Concepts

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Hydrogen bonds

Back

A type of chemical bond where a hydrogen atom is attracted to an electronegative atom, such as oxygen or nitrogen, in another molecule.

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Polar covalent bonds

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A type of covalent bond where electrons are shared unequally between atoms, resulting in a molecule with a slight electric dipole moment.

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Cohesion

Back

The property of like molecules (of the same substance) to stick to each other due to mutual attraction.

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Adhesion

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The property of different molecules or surfaces to cling to each other.

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Solvent

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A substance that dissolves a solute, resulting in a solution.

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Metabolism

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The set of life-sustaining chemical reactions in organisms.

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Xylem

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The vascular tissue in plants that conducts water and dissolved nutrients upward from the root and also helps to form the woody element in the stem.

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Surface tension

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The elastic tendency of a fluid surface which makes it acquire the least surface area possible.

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Capillary action

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The ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity.

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Hydrophobic

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Tending to repel or fail to mix with water.