حل ورقة عمل Natural Hazard العلوم المتكاملة الصف السابع

حل ورقة عمل Natural Hazard العلوم المتكاملة الصف السابع

1) The surface along which the crust moves is called a fracture.

True
False

2) is responsible for most of the damage buildings suffer during earthquakes……………………

3) The forces that move tectonic plates also move rocks along the fault.
True
False

4) The larger the force applied to a fault, the smaller the chance of a large earthquake.
True
False

5) For the Richter scale, each increase on the scale represents ten times the amount of ground motion recorded on the seismogram. How much more motion is there for a magnitude 7 earthquake than a magnitude 4 earthquake?
A) 3 times
B) 30 times
C) 1000 times
D) 3000 times\

6) Which scale would be used to classify an earthquake based on a description found in ancient writings?
A) Modified Mercalli Scale
B) Richter Scale
C) moment magnitude scale
D) all of the above

7) Looking at the figure that shows world-wide earthquake distribution, the white lines
represent plate boundaries. Which statement is true?

A) Deep earthquakes are more common than shallow earthquakes.
B) Shallow earthquakes are more common than deep earthquakes.
C) Shallow earthquakes and deep earthquakes are equally common.
D) Shallow earthquakes do not occur along plate boundaries, but deep earthquakes do.

10) ……………Locations where volcanoes form far from plate boundaries are called

11) Today, people are never killed by volcanic eruptions.
True False

12) Which of the following is NOT studied by geologists to predict volcanic eruptions? OA) ground deformation
OB) earthquake swarms
C) change in shape of the volcano
D) animal behavior

13) Which statement accurately describes a pyroclastic flow?
A) Pyroclastic flows move at speeds of more than 100 km/hr and have temperatures over 1,000°C.
B) Pyroclastic flows occur when the snow and ice of the summit are melted and mix with the ash and mud on the mountain.
C) Pyroclastic flows move very slowly, and are rarely deadly.
D) Pyroclastic flows move very quickly but are relatively cool.

14) How many volcanoes erupt each year, on average.
A) less than 5
B) around 20
C) around 60
D) more than 100

15) The Hawaiian Islands are examples of volcanoes that are associated with a
A) convergent plate boundary
B) divergent plate boundary
C) transform plate boundary
D) hot spot

16) A ____ often forms a mountain when layers of lava and volcanic ash erupt and build up..

A) caldera
B) volcano
C) dike
D) batholith