APEX unit 2 Measurement and Data

Sanjeev wants a rug for his room. Which SI unit is best for describing the area of his room?

• Meters squared (m²)

• Centimeters cubed (cm³ )

• Millimeters (mm)

• Kelvins (K)

Which two tools could be used to measure the volume of this eraser?

• Graduated cylinder and Triple-beam balance

• Tape measure and Graduated cylinder

• Digital thermometer and Tape measure

• Triple-beam balance and Digital thermometer

Which tool could allow you to see the details of a plant cell, such as the ones shown here?

• Microscope

• Journal

• Hand lens

• Telescope

Which tool would best allow you to make observations of an object's color and texture?

• Graduated cylinder

• Balance scale

• Digital thermometer

• Digital camera

Each X shows the location of an archer's arrow on a bull's-eye target. The archer was aiming for the center circle. Which words best describe the archer's results?

• Low precision, low accuracy

• High precision, high accuracy

• High precision, low accuracy

• Low precision, high accuracy

Using very powerful microscopes, scientists estimate the volume of some of the smallest bacterial cells to be 0.0090 cubic micrometers. What is the correct way to write this amount in scientific notation?

• 0.9 × 10^–2 cubic micrometers

• 9 × 10² cubic micrometers

• 9.0 × 10³ cubic micrometers

• 9.0 × 10^–3 cubic micrometers

A proton is a very tiny particle inside an atom. The mass of a proton is estimated to be 0.00000000000000000000000167 g. What is the mass of a proton in scientific notation?

• 167 × 10 ^–26 g

• 1.67 × 10 ^–24 g

• 1.67 × 10 ²⁴ g

• 16.7 × 10 ^–25 g

The male African elephant at the city zoo has a mass of 5450 kg. What is its mass in scientific notation?

• 5.45 × 10³ kg

• 5.45 × 10 ^–3 kg

• 54.5 × 10² kg

• 545 × 10³ kg

Which phrase best describes how scientists use the data they collect?

• To prove that a scientific hypothesis is correct

• To decide if there is support for an experiment's conclusions

• To convince students to repeat their experiments

• To persuade other people to believe the same things

A student records the amount of time it takes mice to run through a maze. Which two terms describe this type of data?

• Quantitative and Discrete

• Qualitative and Discrete

• Quantitative and Continuous

• Qualitative and Continuous