Test: elements, compounds and mixtures

Mixtures can be distinguished from compounds because ____.

• they taste better
• the are always solids
• the parts that make up a mixture keep their properties
• they are chemically bound

dissolving sugar in iced tea is an example of a:

• Physical change
• Chemical Change

A ________has different properties than the elements that form it.

• element
• compound
• homogeneous mixture
• heterogeneous mixture

For all chemical reactions to occur, some energy is required. This is called the ___ energy.

• kinetic
• potential
• activation
• mechanical

Baking cookies is an example of a:

• Physical change
• Chemical change

Lighting a match is an example of a:

• Physical change
• Chemical change

One difference between an element and a compound is that a(n) ____.

• compound contains carbon
• element contains more atoms than a compound
• compound includes several elements chemically bound
• elements is a pure substance, a compound is not

Two or more elements chemically combined, whose properties are completely different from those of the individual elements, are known as ____.

• Compound
• Heterogeneous
• Homogeneous
• Solution

Pure substances ____.

• Are made of up of only one material
• Have definite and constant properties under certain conditions
• Are elements or compounds
• All of these are correct
• None of the above

Ionic bonds are formed by ___.

• the attraction between oppositely charged ions
• sharing electrons unequally
• sharing electrons equally