midterm exam staar released

Front

What is a nonmetal?

Back

Nonmetals are elements that typically lack the properties of metals. They are usually poor conductors of heat and electricity, have higher electronegativities, and can form negative ions.

Front

What indicates a chemical reaction has occurred?

Back

A chemical reaction is indicated by observable changes such as the formation of a solid (precipitate), gas, or color change when substances are mixed.

Front

What is the role of gravity in motion?

Back

Gravity is a force that attracts objects toward each other. It causes objects to accelerate downward when thrown upward, changing their velocity.

Front

What are chemical properties?

Back

Chemical properties are characteristics of a substance that become evident during a chemical reaction, such as reactivity with other chemicals, acidity, and flammability.

Front

Why does the sun appear brighter than other stars?

Back

The sun appears brighter than other stars because it is much closer to Earth, allowing its light to be more intense compared to distant stars.

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a force.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another, involving the breaking and forming of bonds.

Front

What is a precipitate?

Back

A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of chemical elements, organized by increasing atomic number, which shows periodic trends in properties.