Science Leap Review

Scientist suggest that the movement of Earth's liquid iron core results in electrical currents. These currents would then result in Earth's magnetic field. Recent satellite data suggest that the strength of Earth's magnetic field has weakened by about 3.5 percent in some areas. In other areas, Earth's magnetic field strength has increased by about 2 percent. Which statement best explains the differences in Earth's magnetic field strength based on the movement of Earth's liquid iron core?

• The movement of Earth's liquid iron core stopped in both locations.

• The movement of Earth's liquid iron core changes direction in some locations.

• The movement of Earth's liquid iron core is the same in all locations

• The movement of Earth's liquid iron core increased speed in both locations.

Based on Figure 2 and Figure 3, A magnetic compass needle is able to detect the direction of Earth's magnetic North Pole. Over hundreds of thousands of years, the direction in which a compass needle points would ________.

• stay the same

• change

Based on Figure 2 and Figure 3, During a normal polarity period, a compass needle points mostly in the direction of the ________.

• geographic North Pole

• Equator

• geographic South Pole

Scientist are planning an investigation to collect evidence to help predict future magnetic pole reversals of Earth's magnetic field. Using information from figure 3, describe how scientists can collect data on changes in Earth's magnetic poles and explain how the data can be used to predict future magnetic pole reversals.

Tags

NGSS.HS-PS2-5

What is the process by which plants use sunlight to synthesize foods from carbon dioxide and water called?

• Respiration

• Photosynthesis

• Fermentation

• Digestion

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following best defines science?

• A collection of unchangeable facts about the natural world

• The study of the natural world through observation, identification, description, experimental investigation, and theoretical explanations

• A belief system based on assumptions about the natural world

• A method for proving theories beyond doubt

Tags

DOK Level 1: Recall

What is a common method for scientists to communicate their research findings?

• Through artistic performances

• By publishing in scientific journals

• By creating infomercials

• Through political debates

Tags

DOK Level 1: Recall

Which statement best describes how the organisms shown in figure 1 compete for resources?

• Rabbits, grasshoppers, and mice all compete with snakes for food

• The Anasazi, mice, and domesticated turkeys all compete for corn

• Hawks, rabbits, and the Anasazi all compete for grass

• Snakes, hawks, and domesticated turkeys all compete with the Anasazi for food

Tags

NGSS.MS-LS2-1

Which statement about the forces acting on the balancing rock best explains the stability of the rock over time?

• No forces are acting on the rock

• the sum of the forces acting on the rock is zero

• the force of gravity is not acting on the rock

• the force of gravity is the only force acting on the rock

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Based on the information in the model, which statement best explains how DDT was introduced into eagle populations?

• The eagles absorbed the DDT directly from the air

• The eagles absorbed the DDT directly from the water

• The eagles absorbed the DDT after eating large fish

• The eagles absorbed the DDT after eating zooplankton

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4