Download presentation
Presentation is loading. Please wait.
1
Earth and Space Science
Changing Earth’s Surface
2
Natural events, human actions
1. Most environments are constantly changing. Environmental changes can be caused by ___________ ____________ or _____________ _______________.
3
floods, storms, volcanoes, droughts
2. Natural events include natural disasters and changes caused by organisms other than humans. Natural disasters such as earthquakes, _____________, _______________, _____________ and ________________ can drastically alter environments.
4
sudden, violent, dams 3. Natural disasters can cause _________________ and _________________ changes to Earth’s surface. These changes greatly affect the plants, animals, and people living where these disasters occur. Beavers, for example, build _________. Their dams can cause flooding, but the dams can also be beneficial by creating new habitats.
5
People, habitats, pesticides, polluting
4. ______________________ can also cause changes to the environment by destroying __________________, using __________________, and _________________.
6
Tsunami, tsunami 5. One of the most damaging natural disasters is a _______________. A __________________ is a series of huge waves caused by an earthquake or volcanic eruption beneath the ocean.
7
Increases, slow 6. The speed of a tsunami depends on the depth of the
water. As the waves reach shallow water, the height of the wave _________________ and the waves ___________ down.
8
Richter Scale 7. On December 26, 2004, and earthquake measuring between 9.0 and 9.3 on the ______________ _____________ occurred in the Indian Ocean. The earthquake triggered a tsunami that sent a series of waves crashing into coastlines of Asia destroying whole villages and killing hundreds and thousands of people
9
warn 8. Tsunamis often take hours to travel across the ocean. It may be possible to __________ people before the waves reach the shore.
10
large, rain 9. Floods are usually caused by a ____________ amount of ___________ that falls in a short period of time.
11
force 10. Floods are dangerous to nearby inhabitants because of the ____________ of flowing flood water and people sometimes driving through floodwater.
12
levees 11. In areas that are in a river’s flood plain, people try to control the water’s flow by building dams or structures called _________________.
13
levee, Levees, more water
12. A _____________ is a wall or a large amount of Earth built along a river to prevent it from flooding. _________________ raise or extend the banks of a river so that _______________ _______________ than usual can flow in the river.
14
power, gas 13. When earthquakes occur in an area populated with people, _____________ and ________________ lines can be broken which can cause destructive fires.
15
landslide, volcanoes, earthquakes
14. A _________________________ can occur from heavy rainfall, rapid snowmelt, ____________ and _______________. A landslide can carry buildings down a hillside or bury highways under debris
16
natural disasters 15. The sudden changes caused by _________ _______________ can have long-term effects on Earth and its habitats.
17
volcanoes, climate 17. Some natural disasters, such as ___________________, can affect the _______________ for both short or long periods of time.
18
floods, landslides 18. __________________ and ____________________ can add to the soil by leaving behind nutrient-rich mud.
19
positive changes 19. Natural disasters cause harm, but they can also bring about _____________ ____________
20
Volcanoes (island chains)
tsunami flooding
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.