Halloween Science

Front

What country popularized Halloween in the U.S.?

Back

Ireland.

Front

Is corroding metal a chemical or physical change?

Back

Chemical change.

Front

Where did Jack-o'-lanterns originate?

Back

Ireland.

Front

What is the molecular structure of table salt?

Back

NaCl.

Front

What is net force?

Back

The total force acting on an object, taking into account both magnitude and direction.

Front

What is the significance of chemical changes?

Back

Chemical changes result in the formation of new substances with different properties.

Front

What are the signs of a chemical change?

Back

Color change, gas production, temperature change, and formation of a precipitate.

Front

What is the formula for calculating net force?

Back

Net force = mass × acceleration (F = ma).

Front

What is the role of sodium and chlorine in table salt?

Back

Sodium (Na) is a metal that donates an electron, while chlorine (Cl) is a non-metal that accepts an electron, forming an ionic bond.

Front

What is the historical significance of Halloween?

Back

Halloween has roots in ancient Celtic festivals, particularly Samhain, marking the end of harvest and the beginning of winter.