midterm exam staar released

Front

What is the reason the sun appears brighter than other stars to people on Earth?

Back

The sun is closer to Earth than any other star.

Front

What is a nonmetal?

Back

A nonmetal is an element that typically lacks the properties of metals, such as conductivity and malleability. Nonmetals are usually poor conductors of heat and electricity.

Front

What phase of the moon comes after the Waning Crescent?

Back

Waning Gibbous.

Front

What is an indication that a chemical reaction has occurred?

Back

A solid forms when two clear solutions are mixed.

Front

What is the definition of a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What are the properties of nonmetals?

Back

Nonmetals are generally brittle, not shiny, and poor conductors of heat and electricity.

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 significance of the sun's temperature in relation to other stars?

Back

The sun burns at a higher temperature than some stars, but its brightness is primarily due to its proximity to Earth.

Front

What is the definition of a star?

Back

A star is a massive, luminous sphere of plasma held together by gravity, undergoing nuclear fusion.

Front

What is the role of the sun in the solar system?

Back

The sun is the central star of the solar system, providing light and heat that sustain life on Earth.