Give scientific reasons.
Any object on earth falls vertically downward and not in any other direction.

Give scientific reasons: Air is a mixture

Give scientific reasons : Water is life.

Give scientific reasons: Hydrogen is an element.

Give scientific reasons: Methane is used as fuel.

Any object on earth falls vartically downward and not at an angle to the vertical, nor fly off in a horizontal direction .

Give scientific reasons: Water is a compound

Give scientific reasons: Milk is a colloid.

Give scientific reasons: Tobacco smoking causes cancer.