What are landforms made of?
Name one example of a landform
a mountain, cliff, valley, beach
What is one way water appears on Earth?
ocean, river, lake, stream, rain
What is one piece of sand called?
a grain of sand
What is a model?
something scientists make to help them think about the real world
What word means “staying mostly the same”?
stable
What are most landforms made of?
rock
When water hits rock, what can happen to tiny pieces?
pieces can break off
What three properties of sand did we observe?
size, shape, color
Give one example of a model used in this unit.
hard candy model, chalk model, sand model
Give one example of a fast change to land
flooding, tsunami, tornado
What are mountains made of ?
rock
What is it called when water changes land?
water erosion
What might black sand tell us about what it is made of?
volcanic rock
How did shaking the jar of hard candies help us understand erosion?
the candy broke into pieces and will take time to break up completely.
Give one example of a slow change to land
waves hitting rocks over time
What does a mountain and cliff have in common?
they both contain rock or soil
How can sand in water make erosion happen faster?
sand is unstable and can be moved easily
Where does sand come from?
small or big pieces of rock
Name one way a model is different from the real world
it is smaller, you can use only certain materials
Why can many small changes be hard to notice at first?
each change is tiny, so it adds up slowly
What landform is in the middle of the ocean? what is it made of?
an island/peninsula and it is made up if sand or small pieces of rock.
How can waves change a clif overtime?
Waves hit the cliff many times and break off tiny pieces that add up to big change
What is the difference between new and old sand?
new sand is bigger and sharper. Old sand is smaller and smooth
Explain how scientists use both models and books (like Gary’s Sand Journal) as evidence to make an explanation.
They gather observations from models and texts
Compare a cliff made of loose material and a cliff made of solid rock — which could erode quickly and why?
loose-material cliff erodes quickly because pieces can break off more easily; rock is stronger so changes are slower