AFNR 3.2 Key Terms

What is the definition of an acid?

• A substance that gives off hydroxyl ions when dissolved in water

• A substance containing hydrogen that dissociates to form hydrogen ions when dissolved in water

• A measure of how many hydroxyl ions a solution contains

• A key for identifying organisms based on choices between alternative characters

Tags

NGSS.MS-PS1-1

What does the term "neutral" refer to in chemistry?

• A substance with a pH above 7.0

• A substance with a pH less than 7.0

• Exhibiting neither acid nor alkaline qualities

• A measure of how many hydrogen ions a solution contains

What is a hypothesis?

• A diagram representing a system of connections

• A statement that can be tested experimentally

• A key for identifying organisms

• A chemical group consisting of one atom of hydrogen and one of oxygen

What is the function of a dichotomous key?

• To arrange or organize a group based on common attributes

• To exhibit information in a table or systematic arrangement

• To identify organisms based on choices between alternative characters

• To derive by reasoning from premises or evidence

What is the definition of pH?

• A measure of how many hydroxyl ions a solution contains

• A numerical measure of a substance's acidity or hydrogen ion activity

• A seeking or request for truth, information, or knowledge

• A sheet exhibiting information in a table or systematic arrangement

What does the pH scale quantify?

• The speed of a chemical reaction

• The temperature of a solution

• The relative concentrations of hydronium and hydroxide ions

• The mass of a substance

What is a prediction in scientific terms?

• A proven fact

• An assumption of an anticipated outcome

• A random guess

• A detailed experiment

Tags

NGSS.MS-LS1-5

What type of information is considered qualitative?

• Numerical data

• Observable information based on physical characteristics

• Statistical analysis

• Measurable information

What is the scientific method?

• A random trial and error process

• A linear procedure for investigating scientific problems

• A method for creating new elements

• A way to memorize scientific facts

Tags

NGSS.MS-ETS1-4

NGSS.MS-PS1-2

What does taxonomy involve?

• The study of chemical reactions

• The classification of organisms and their arrangement into systematic groups

• The measurement of physical quantities

• The prediction of weather patterns