Matter and Energy

Click letters and numbers to answer the question or type your answer in the text box and click Submit. You have 6 attempts to answer each question.

This game has a question on-screen along with the required character spaces. A panel at the bottom provides you with the letters of the English alphabet and numerals zero to nine. Click all the letters or numbers in the answer, or alternatively type in the answer and click the Guess the Answer button. After your sixth incorrect entry, the hangman fills in the answer for you. If you get it right, you're free of the noose and move on to the next question.

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Part of an atom that is made up of empty space in which electrons move: (answer in two words)

What is the smallest complete part (building block) of matter?

What is the central part of an atom that contains most of its mass called?

Substance made of only one kind of atom:

Which sub-atomic particle decides the atomic number of an element?

What determines an element's chemical properties?

(answer in two words)

The likelihood and rate at which a substance undergoes a chemical reaction:

What is the atomic number of Nitrogen?

What is the chemical symbol for Gold?

In the periodic table, elements in the same period are arranged in order of increasing ________.

(answer in two words)

What is a substance made of two or more atoms called?

What is a molecule made of two or more elements called?

CH2O is the formula for which compound?

What type of change happens when carbohydrates in food change into simple sugars?

Metals can be flattened because they are ________.

What types of elements are located on the left side of the periodic table?

Reactions that absorb heat are called _____ reactions.

Reactions that produce heat are called _____ reactions.

______ is neither created nor destroyed during an ordinary chemical reaction.

Starting substance in a chemical reaction is called a __________.

Number placed in front of an element symbol or chemical formula is called the ___________.

A compound that includes carbon along with the elements hydrogen, oxygen, nitrogen, phosphorous, and/or sulfur is called an ___________ compound.

A _______ property can be observed without changing the substance into a different substance.

In a food chain or energy pyramid, most of the energy is used to support an organism’s _________ processes.