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How much of the air supports burning ? — Is air a mixture ?
How can we explain burning ? What is a flame?
posed ? What causes dew and frost ? How are clouds
the heavenly bodies rise and set? What is the path of a
. What are
body have weight? In what direction does the earth pull ?
What is the density of water? Why does a body float?
Why does a pendulum swing ? - What is a force ?
Can water be changed ? What is an element?
What is phosphorus like? What is a match ? — Ex-
water boil ? How is ice made? How is ice cream frozen ?
How do bodies of water affect climate? How does
rocks? How are stratified rocks formed ?
weathering? How is our soil formed ? What is the
preserve food ?
· How is meat smoked ? - What are salting