Book 12 science quiz: free printable worksheet

Fill in the missing number

Number bank: 10   11   30   50   90   150   180   350   1,000   1815   1963   7,700

1. The cinders pile up at the steepest angle they can hold, about _______ degrees, just like a pile of sand.
   From: Why Do Cinder Cones Look Like Sand Piles?
2. In _______, Mount Tambora in Indonesia had the biggest eruption in recorded history.
   From: What Was the Biggest Eruption People Have Ever Recorded?
3. Ash from Mount Mazama in Oregon fell across western Canada about _______ years ago and can still be found in soil.
   From: Why Do People Study Ash Layers in Soil?
4. About _______ percent of the world’s earthquakes and many of its volcanoes happen along it.
   From: Why Is the “Ring of Fire” So Quake-Y?
5. The Mariana Trench is the deepest place in the ocean, nearly _______ kilometers down.
   From: Why Is the Mariana Trench So Deep?
6. The oldest ocean floor is only about _______ million years old, but some continents have rocks billions of years old.
   From: Why Is Seafloor Younger Near Ridges?
7. In _______ million years the coastlines may look very different, though we can only predict the pattern, not the details.
   From: Why Will Maps Look Different in 50 Million Years?
8. Cold seawater seeps into cracks, heats up near magma to over _______ degrees Celsius, and dissolves metals and sulfur from the rock.
   From: Why Do Black Smokers Exist on the Seafloor?
9. Diamonds form deep underground, over _______ kilometers down, where carbon is squeezed by great pressure and heat.
   From: How Do Diamonds Come Up From Deep Inside Earth?
10. In a lab, scientists melt rocks in furnaces at over _______ degrees Celsius.
    From: Why Do Labs Recreate Magma in Furnaces?
11. In _______, a new island called Surtsey appeared off Iceland.
    From: Why Will New Islands Keep Appearing Sometimes?
12. Mauna Kea in Hawaii rises about _______ kilometers from the seafloor, taller than Mount Everest measured from sea level.
    From: How Tall Can a Volcano Grow?