Rivers/Oceans
How can you tell if a body of water is a river or a lake.
The water is flowing in a river.
If the rock is red at the top of the mountain, what color will the sand be downriver?
Red
Why won't a hillside stay the same forever?
Wind and water will erode the land and carry bits of land and rock to new places.
Name 3 natural things that can help stop a hillside from eroding - not man made things.
Plants to hold the soils with their roots.
Leaves to keep the rainwater from hitting the soil.
Dead plants on the ground to soak up rainwater.
Where do all rivers start
High places/mountains
What happens to rocks as they travel down a river.
The break and become smaller and smaller.
Explain how canyons form.
As water flows over land, it carries bits of earth away and moves it downhill. Over time, as land is worn away, a canyon is formed.
What happens if there is a wildfire on a hillside?
The wildfire burns the plants and without the plants the hillside can erode and a landslide can happen.
All rivers eventually end at the ______________.
ocean
Wind and water can change land and rocks. What is this force called?
erosion
Do canyons form quickly or slowly?
They form slowly because it takes lots of time for that water to carry enough bits of land away to form a canyon.
When you did the experiment to try to stop a landslide, what materials were effective at stopping a landslide?
Depending on what you used in your experiment you might say cotton balls soaked up water, paper towels protected the hillside from sliding down or foil kept water from falling on the hillside.
What caused the other cliff to change over night?
A big storm eroded the cliff. This was caused by the wind, rain, and waves.
Why is there sand at the beach?
Rocks from up river are broken up into as they travel down river to the ocean. They knock against each other and break into tiny bits of rock.
What is it called when wind or water change the land.
erosion
In real life what are some solutions people have used to stop landslides?
Covering the hillside in plastic blankets, concrete, nets, waddles or planting seeds to hold the soil in place.
How can a river change a mountain?
The river causes the mountain to erode and sometimes turns it into a valley.
If the sand grain is sharp and big what does that mean?
The sand is new and formed by big waves.
How can a canyon change fast?
A flood causes the sides of the canyon to erode.
A landslide.