8th Grade Science NC EOG Review

What is an example of a mixture?

• Granite is an example of a mixture, as it contains different minerals that are not chemically bonded.

• Water is an example of a mixture, as it contains hydrogen and oxygen.

• Salt is an example of a mixture, as it can be separated into its components.

• Air is an example of a mixture, as it contains various gases like nitrogen and oxygen.

What are the three states of matter?

• Solid, liquid, and gas

• Solid, liquid, and plasma

• Solid, gas, and vapor

• Liquid, gas, and steam

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the significance of chemical bonds in compounds?

• They are responsible for the color of the compound.

• They hold the atoms together in a compound, determining its properties and behavior.

• They allow compounds to exist in gaseous form.

• They are only important in ionic compounds.

Tags

NGSS.MS-PS1-5

What is an example of a compound?

• Water (H2O)

• Oxygen (O2)

• Hydrogen (H2)

• Carbon Dioxide (CO2)

Tags

NGSS.MS-PS1-1

What is the role of a scientist in biotechnology?

• A scientist in biotechnology researches and develops new technologies and products that improve health, agriculture, and the environment.

• A scientist in biotechnology primarily focuses on teaching students about biological concepts.

• A scientist in biotechnology conducts experiments to prove existing theories without developing new technologies.

• A scientist in biotechnology manages laboratory operations and oversees staff without engaging in research.

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NGSS.MS-ETS1-1

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What is the pH scale?

• A scale that measures temperature from 0 to 100 degrees Celsius.

• A scale that measures how acidic or basic a solution is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

• A scale used to measure the concentration of dissolved oxygen in water.

• A scale that indicates the salinity of a solution, from 0 to 35 parts per thousand.

What is the law of conservation of mass?

• The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

• Mass can be created or destroyed in a chemical reaction.

• The total mass of products is always greater than the total mass of reactants.

• Mass can change forms but is always lost in a chemical reaction.

Tags

NGSS.MS-PS1-5

What is a compound?

• A substance made of only one type of atom.

• A mixture of two or more substances that are not chemically bonded.

• A substance composed of two or more different elements that are chemically bonded together.

• A solution where one substance is dissolved in another.

Tags

NGSS.MS-PS1-1

What is the difference between an element and a compound?

• An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

• An element is a mixture of different substances, while a compound is a single substance.

• An element can be broken down into simpler substances, while a compound cannot.

• An element is always a solid, while a compound can be a solid, liquid, or gas.

What is a mixture?

• A combination of two or more substances that are chemically bonded.

• A combination of two or more substances that are not chemically bonded and can be separated by physical means.

• A single substance that cannot be separated into its components.

• A solution where one substance is dissolved in another.