Leap Science Review

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

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-LS2-3

NGSS.MS-LS2-4

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.MS-ESS2-3

Scientist claim that tree growth glowed during the period from AD 1100 to 1300, resulting in thinner tree rings. Based on the information in Table 1, which statement can best be used as evidence to support the claim?

• More than 40 percent of the west in typically affected during dry periods.

• The average precipitation in the west significantly increased during this period.

• A large percentage of the west was affected by dry conditions during this period.

• The average precipitation in the west increased after AD 1300.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

What evidence from the graph best shows how the availability of corn likely affected the farming of domesticated turkeys in figure 1?

• An increase in corn production during the Great Drought increased the domestic turkey population.

• An increase in corn production during the Great Drought decreased the domestic turkey population.

• A decrease in corn production during the Great Drought decreased the domestic turkey population

• A decrease in corn production during the Great Drought increased the domestic turkey population.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

During the Great Drought, a decrease in the ______ had the greatest impact on the survival of the Anasazi people.

• growth of corn

• rabbit population

• growth of grass

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

As conditions changed, the Anasazi relied (more / less) on domesticated turkeys and (snakes / mice / rabbits) for food

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is the primary reason for the occurrence of leap years in the Gregorian calendar?

• To correct the drift between the calendar year and the solar year

• To account for the Earth's axial tilt

• To synchronize the lunar and solar calendars

• To adjust for the Earth's elliptical orbit