Period 1 Nature of Science

Some scientists originally thought that bacteria were simple organisms with no specific structures. Which technological advancement helped scientists better understand bacteria?

• lasers

• robotics

• genetic engineering

• electron microscope

Which unit would most likely be used to describe the speed of a moving bicycle?

• meters per second

• kilometers per minute

• millimeters per second

• centimeters per minute

Tags

NGSS.MS-PS3-1

A student needs to measure 50 mL of water. Which tool should the student use to make the most accurate measurement?

• a balance

• a thermometer

• a glass beaker

• a graduated cylinder

A student adds 50 mL of water to a beaker. Next, the student covers the beaker with plastic wrap and places the beaker on a shelf near a sunny window. The student plans to observe the beaker during the next 12 hours. What is this investigation most likely modeling?

• how weathering occurs in nature

• the processes of evaporation and condensation

• the effect of sunlight on the temperature of water

• how convection of the water is due to uneven heating

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS3-4

How can studying rock layers and fossils help scientists learn about past environments?

• The scientists can use the data to predict weather patterns.

• The scientists can use the data to design better laboratory tools.

• The scientists can use the data to make better models of complex systems.

• The scientists can use the data to make predictions about animal populations.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Which tool should a student use to accurately determine the distance around the outer edge of a marble?

• a wooden ruler

• a metal balance

• a cloth tape measure

• a glass graduated cylinder

Use the data table below to answer the question.

• Planets located closest to the Sun have less mass.

• Planets have more mass the greater their distance from the Sun.

• Planets less than two astronomical units (AU) from the Sun are less massive than Earth.

• Planets more than two astronomical units (AU) from the Sun are less massive than Earth

Tags

NGSS.MS-ESS1-3

A student wants to determine the maximum amount of a solute that will dissolve in 100 mL of a solvent. Based on the data, the student concludes that 30 mg of the solute is the maximum amount that can be dissolved. Which change would best improve the design of this experiment?

• crushing the solute into smaller pieces

• stirring the solvent when adding the solute

• using the same amount of solvent in each trial

• testing solutes with different chemical formulas

Tags

NGSS.MS-ETS1-3

NGSS.MS-PS1-2

Use the maps below to answer the question. Each map shows the same airport locations but different proposed flight paths. Which statement best explains why map 2 is a more efficient flight-path system?

• Map 2 has less frequent flights to reduce the total flight times.

• Map 2 has more frequent flights to reduce the number of passengers.

• Map 2 has a hub-and-spoke pattern to reduce the total number of flights.

• Map 2 has a repeated-triangle pattern to reduce the number of passengers.

Tags

NGSS.HS-ETS1-3

In 1883, a volcano erupted on the island of Krakatoa. Most of the plants on the islands near Krakatoa were destroyed. Which inference is most reasonable related to the animals that survived the eruption?

• The animals swam to other islands.

• Fossil evidence of the animals decreased.

• Competition between the animals increased.

• The animals that were herbivores became carnivores.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4