Introduction Test Review

1) When working with fire and chemicals you should always:

2) What is the first thing you should do before starting any experiment?

3) What is the difference between Science and Pseudoscience?

4) What instrument is used to measure liquid volume?

5) The curve of a liquid in a measuring device is called a

6) What unit is used to measure mass in the metric system?

7) What units are used to measure volume in the metric system?

8) What factor does the experimenter change to see what happens?

9) You see a flash of lightening, what would you infer that should happen next?

10) What is the difference between a Scientific Theory and a Law?

11) Why should there only be ONE independent variable for an experiment?

12) What is the atomic number always equal to?

13) Define an Atom:

14) What is an element?

15) A compound is when ___ or _____ elements are combined chemically.

16) A _____ is when 2 or more substances can easily be separated without a chemical; change.

17) Explain liquid displacement:

18) What element has 7 protons?

19) What element has 14 protons, 14 neutrons, and 14 electrons?

20) Which ones are compounds: 1. Helium gas 2. Iron bars 3. Helium gas and Oxygen gas in the air 4.Carbon dioxide gas

21) Give an example of a mixture and a compound, then explain why:

22) Zinc has an atomic number of 30 and an atomic mass of 65, how many neutrons does it have?

23) If a metal bar had a volume of 34 ml, and a density of 2.0 g/ml, what would the mass be?

24) If you had a cube with one side’s length at 2 cm, and with a mass of 16 grams, what would be the density?

“If you always put limit on everything you do, physical or anything else. It will spread into your work and into your life. There are no limits. There are only plateaus, and you must not stay there, you must go beyond them.” Bruce Lee