7th Science: Practice Test

Question 1

Helium and neon are examples of _______.

Answer 1

nonmetals

Question 2

________________ are light elements with a strong reaction to other elements they come into contact with.

Answer 2

Alkali metals

Question 3

________ have a sour taste and corrode metal quickly.

Answer 3

Acids

Question 4

Which scientist organized the known elements into the periodic table?

Answer 4

Dmitri Mendeleev

Question 5

___________ are elements that do not join with other kinds of atoms easily.

Answer 5

Inert elements

Question 6

A(n) _______ is a specific type of atom with unique properties.

Answer 6

element

Question 7

Bases are made up of _______ ions, which are _______ charged molecules of hydrogen
and oxygen.

Answer 7

hydroxide; negatively

Question 8

____________ are metals that were first found in rocks and minerals and “prefer” to join with other elements.

Answer 8

Alkaline earth metals

Question 9

____________ are elements found in their pure form that do not combine with other elements.

Answer 9

Noble gases

Question 10

A change in color and the production of light are both often evidence of a _______ change. A change in size, shape, or solubility are examples of a _______ change.

Answer 10

chemical; physical

Question 11

As the metals progress from left to right on the periodic table, they grow _____________ to other elements.

Answer 11

heavier and less reactive

Question 12

Which of the following is a major group of elements?

Answer 12

all of these

Question 13

A piece of wood has a mass of 5 grams and a volume of 5.88 cubic centimeters. What is the density of the wood?

Answer 13

0.85