Examlex
Compare the HIV virus that causes AIDS with a typical computer virus.
Mass
A property of a physical body, indicating the amount of matter it contains and a measure of its resistance to acceleration when a force is applied.
Physical Change
Changes affecting the form of a chemical substance, but not its chemical composition, such as melting or freezing.
Chemical Change
A process where substances interact to form one or more new substances with different chemical and physical properties.
Dense Material
Substances that have a high mass per unit volume, often characterized by compactness of molecular or atomic structure.
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