Reference Materials

Circuit

• The pathway through which electricity flows

• The flow of electrical energy through a circuit

• To move or travel smoothly in a certain direction

• A material that allows heat or an electric current to flow through easily -- “can”

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Flow

• The pathway through which electricity flows

• To move or travel smoothly in a certain direction

• Energy that causes a transfer of heat between materials

• Pushing or pulling force produced by a magnet

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Mass

• Anything that has mass and takes up space

• The amount of matter in something; measured in grams

• The amount of space matter takes up; measured in liters (L), cubic centimeters (cm3 ), or milliliters (mL)

• Energy that causes a transfer of heat between materials

Relative Density

• The amount of space matter takes up; measured in liters (L), cubic centimeters (cm3 ), or milliliters (mL)

• How dense something is compared with a reference material

• Pushing or pulling force produced by a magnet

• Measurement of the ability of a solid to dissolve in a liquid

Tags

NGSS.MS-PS1-2

Which of the following is a common reference material used in scientific experiments to ensure accuracy and precision?

• Distilled water

• Standard solution

• Tap water

• Salt solution

What is the primary purpose of using a reference material in a scientific experiment?

• To provide a control for comparison

• To increase the speed of the experiment

• To reduce the cost of the experiment

• To make the experiment more complex

In the context of chemistry, which of the following is often used as a reference material for pH calibration?

• Sodium chloride

• Potassium permanganate

• Buffer solution

• Ethanol

Which reference material is commonly used in physics to measure the speed of light?

• Quartz crystal

• Cesium atom

• Mercury vapor

• Helium gas

Why are reference materials important in the calibration of scientific instruments?

• They provide a known standard for comparison

• They are cheaper than other materials

• They are easier to obtain

• They are more reactive

In biology, which of the following is often used as a reference material for DNA sequencing?

• RNA sample

• Protein marker

• DNA ladder

• Enzyme solution