True or False Directions: On the line before each statement, write T if the statement is true or F if the statement is false. If the
statement is false, change the underlined word to make it true. Write your changes on the lines provided.
4. A(n) compound is a substance made up of one kind of atom.
5. Matter with a composition that is always the same is called a(n) substance.
6. A(n) atom is a small particle that is the building block of matter.
7. A molecule is made up of two or mofe compounds.
8. A(n) mixture is matter that can vary in composition.

1.solid

2.carbon dioxide

3.helium

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.