Chemistry Test 1

A scientist is using mathematical models to isolate a new chemical process. He is working in the field of ____ chemistry.

Analytical

Two scientists are trying to determine the exact nature of the chemicals in a lava flow. They are working in the field of ___ chemistry.

Analytical

A team of scientists is working to discover how an enzyme affects blood cells in sheep. They are working in the field of ___ chemistry.

Bio

An apple turning brown after being cut is an example of a _____ change.

Chemical

Any substance with a definite composition is a ______.

Chemical

Iron and sulfur, when heated, form an iron sulfide that has different properties from either iron or sulfur. The formation of iron sulfide is an example of a _____ change.

Chemical

The study of matter and changes that occur in matter best describes the science of _______.

Chemistry

Some iron and sulfur are mixed together, then heated. When the result is cooled, the iron can no longer be separated from the sulfur with a magnet. The result of heating the mixture was the formation of a(n) ______.

Compound

The two types of matter that are pure substances are _______ and ____.

Compounds and elements

Matter that has neither a definite volume nor a definite shape is in the _____ state.

Gaseous

Gravel is an example of a(n) _____ mixture.

Heterogeneous

A chemistry student is studying the formation of quartz crystals. She is studying ____ chemistry.

Inorganic

Basic research is performed to increase ____.

Knowledge

A sample of matter can be poured from container to container. It takes the shape of its container but only takes up a certain volume. Based on this information, the sample is in the ____ state.

Liquid

The particles of a substance in the ____ ____ are able to slide past each other.

Liquid state

A scientist is working to develop better dating methods for substances that contain carbon. His is working in the field of _____ chemistry.

Organic

A scientist is working to determine the properties and changes of matter and their relation to energy of a newly discovered mineral. She is working in the field of ____ chemistry.

Physical

The melting of butter is a _____ change because it does not produce any new substances.

Physical

When examining a mineral, hardness and color are two of the properties used for identification. Hardness and color are examples of ____ properties.

Physical

Applied research is often performed to find the answer to a particular ______.

Problem

In a bonfire, oxygen allows wood to combust, leaving behind ashes. In this process, oxygen and wood are the reactants, and the ashes are the ______.

Products

The oxygen in air causes iron to rust. Iron and oxygen are ____ in this process, and rust is the product.

Reactants

An alloy such as a gold ring is an example of a(n) ______ mixture.

homogenous

Technological development is performed to better our ______.

quality of life