8th Grade - Homework Week 27

Different relative positions of the sun, the moon, and Earth have different effects on Earth’s ocean. Which model shows the positions of the sun, the moon, and Earth that have the greatest effect on ocean tides?

• 
• 
• 
• 

What are the two main factors that create the tides on Earth?

• Gravitational forces and rotation of Earth on its axis.

• The sun and moon's gravitational pull on the Earth's oceans.

• Distance from the Sun and distance from the Moon.

• Gravitational forces and rotations of Moon on its axis.

Tides are the result of forces exerted on Earth’s oceans mostly by which celestial body?

• The Sun

• Jupiter

• The Moon

• Venus

How often do neap tides occur and when do they occur?

• 1x a month, full moon & new moon

• 2x’s a month, new moon & full moon

• 1x a month, 1^st quarter & 3^rd quarter

• 2x’s a month, 1^st quarter & 3^rd quarter

How often do spring tides occur and when do they occur?

• 1x a month, full moon & new moon

• 2x’s a month, new moon & full moon

• 1x a month, 1^st quarter & 3^rd quarter

• 2x’s a month, 1^st quarter & 3^rd quarter

Which of the following forces creates the tides on Earth?

• Magnetic

• Electrostatic

• Gravitational

• Frictional

Which of the following would have the greatest effect on the size of the tides on Earth?

• Slowing the rate of rotation of the Moon.

• Increasing the rate of revolution of Earth.

• Decreasing the distance between the Moon and Earth

• . Increasing the distance between the Moon and the Sun.

Which statement regarding the relationship of the Sun, Moon, and ocean tides is correct?

• Ocean tides are highest when there is a full moon because the Sun, Moon, and Earth are in alignment.

• Ocean tides are highest when there is a quarter moon because the Sun, Moon, and Earth are at 90^oangles.

• Ocean tides are lowest when there is a new moon because the Sun, Moon, and Earth are in alignment.

• Ocean tides are at their lowest when there is a full moon because the Sun, Earth, and Moon are in alignment.

Look at the diagram provided. How many points on Earth, as indicated by the arrows, will be experiencing high tides?

• 1

• 2

• 3

• 4

A diagram of the Moon and Earth systems is provided. At which points in the diagram would the lowest tides be expected?

• W & Y

• W & X

• Y & Z

• Z & X