5th Grade Science Benchmark

Metals

100

Some metals are not pure elements. They are actually ________, made up of mixtures of metals or metals and other elements. (C-45)

alloys

200

Bronze is an alloy made up of _________ and _________. (C-45)

copper and tin

300

Steel is an alloy made up of __________ and _________. (C-45)

iron and carbon

400

Brass is an alloy of ________ and _____________. (C-45)

copper and zinc

500

Name the 5 properties of metals. (C-44)

1. Luster 2. Malleable 3. Ductile 4. Conducts or transfers electricity 5. Conducts heat

Periodic Table

100

In the Periodic Table, elements are arragned in order of ________ _____________. (C-49)

atomic number

200

Every element on the Periodic Table has an abbreviation called ___________ ______________. (C-49)

Chemical Symbol

300

Some elements have properties of both metals and non-metals. These metals are called ___________. (C-49)

Metalloids

400

All the elements on the left side of the Periodic Table, except hydrogen, are ________. (C-49)

Metals

500

Elements on the Periodic Table are a part of a group. Elements in the same group often have the same number of ____________ in the outer energy levels of their atoms. (C-49)

Electrons

Elements

100

An ___________ is a substance made up of only one kind of atom. (C-42)

element

200

An ___________ is the smallest unit of an element that has all the properties of that element. (C-42)

atom

300

Each element has an ________ _____________, which is the number of protons (and neutrons) in one atom of that element. (C-42)

atomic number

400

Two or more atoms linked together form a __________. (C-42)

molecule

500

There are more than 100 elements, but only _____ natural elements.

90

Elements and Compounds

100

A ________ is a substance made of the atoms of two or more elements. (C-50)

compound

200

A ____________ ____________ shows which elements and how many atoms of each are in a compound. (C-50)

chemical formula

300

When atoms join to form a compound, they undergo a __________ ____________. (C-50)

Chemical Change

400

Compounds can react with eachother. When compounds react, they change and ___________ ______ ___________. (C-50)

form new products

500

Water is the one of the most common compounds. Give the element names and tell how many atoms are present. (C-50)

2 Hydrogen atoms and 1 Oxygen atom, a total of 3 atoms

Common Elements

100

With an atomic number of 8, this colorless gas makes up about 20% of Earth's atmosphere. (C-43)

Oxygen

200

_____________ is a silver-colored metal solid, it combines easily with oxygen, and it is never pure in nature. (C-43)

Aluminum

300

____________ is a greenish-yellow gas with a sharp odor. It is 2.5 times as dense as air and it forms a pale yellow solution in water. (C-43)

Chlorine

400

This element is found in many useful materials, such as steel, and it is found in blood. It carries oxygen to cells. (C-43)

Iron

500

____________ is a soft, silver-colored metal. It combines easily with other non-metals to form salts such as table salt. (C-43)

Sodium