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Grade 4 - Revision for 2nd end-term test
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What can a volcano eruption cause?
It can destroy houses, chang Earth's surface, kill many plants and animals,...
What should we do when we see a volcano erupt?
We should run away fast.
Look at the picture. Which objects sink?
marbles, coins, a folk, a scisssors
Look at the picture. Which objects float?
a ball, an apple, a bottle
A volcano can change Earth’s _ _ rfa _ _.
surface
Magma, gasses, and ash can e _ _ _ t through a volcano.
erupt
_ _ _ _ means to fall into the bottom of the water.
Sink
Bending and stretching are p _ _ _ e _ _ es.
properties
Some objects can be bent but cannot be _ _ _ et _ _ ed, such as the book.
stretched
TRUE or FALSE? Magma, water, and ash can erupt through a volcano.
False
TRUE or FALSE? A volcano eruption can change Earth’s surface.
True
TRUE or FALSE? An object can float because of the material it is made of and its shape.
True
TRUE or FALSE? The big rock sinks because it is heavy.
TRUE
TRUE or FALSE? If an object can stretch, it can also bend.
True
What is the name of this object?
Anchor
What is this?
Magma
Name 3 objects that float.
Amazing!
Name 3 objects that sink.
WOW!
What are the characteristics of an object that floats? (weight, shape)
Light weight, empty shape
What can erupt through a volcano?
ash, magma, gases
A volcano is __________.
 
an opening on Earth from which lava flows.
 
an eruption on Earth of magma.
 
an opening on Earth from which ash flows.
 
an eruption on Earth of ash.
What does a volcano look like before eruption?
It looks like a NORMAL MOUNTAIN that has plants and other living things.
Name 1 object that floats on water.
Good job!
What will happen if you throw a heavy rock into a pond?
It will sink to the bottom of the pond.
Name 2 flexible objects.
You are correct!
Which of these objects can be stretch?
 
Rubber band
 
Ipad
 
Pencil
 
Book