TRUE or FALSE: Every sample of a pure substance has exactly the same composition and the same properties.

A ________________ is any characteristic of a material that can be observed or measured without changing the composition of the substances in the material.

TRUE or FALSE: The substances that make up a compound are always joined in a fixed proportion.

The ability of a solid to be hammered without shattering

TRUE or FALSE: The substances in a candle do not change when the candle burns.

Which is NOT an example of chemical change? baking a cake, leaves changing color, ripping a piece of paper, food being digested

TRUE or FALSE: The smallest particle of an element is an atom.

An element has a __________ composition because it contains only one type of atom.

TRUE or FALSE: Nitrogen is a more reactive element than oxygen.

TRUE or FALSE: A homogeneous mixture is a mixture in which it is difficult to distinguish the substances from one another.

A _______________ is any property that produces a change in the composition of matter.

TRUE or FALSE: In a physical change, some of the substances is a material change, but the properties of the material stay the same.

TRUE or FALSE: A compound has the same properties as the elements from which it is formed.