FLASHBACKS!1. A graduated cylinder is used to:

A. Measure the mass of an object.B. Measure the volume of a liquid.C. Measure the temperature of a liquid.

2. An event, condition, or factor that can be changed or controlled in order to study or test a hypothesis in a scientific experiment is:A. variableB. InferenceC. Instinct

3. How would you find the atomic number of an atom?A. Look at the number of protons and neutronsB. Look at the number of protons.C. Look at the number of electrons missing.

4. How would you find the atomic mass of an atom?A. Look at the number of protons and neutronsB. Look at the number of protons.C. Look at the number of electrons missing.

FLASHBACKS!1. What is the number of neutrons in Iodine (below)?

1. A. 672. B. 733. C. 744. D. 53

2. What is the standard SI unit for volume? MASS

3. What is the standard SI unit for mass? GRAM

4. What is the standard SI unit for length? METER

53

IIodine

127

FLASHBACKS!1. What is the most common element (atom) found

in the Earth’s crust?

2. What are the only 2 planets in our Solar System that do not have moons?

3. Where does sound travel faster, water or air?

4. What is the only letter not used in the Periodic Table?

FLASHBACKS!1. Which particle is NOT found in the nucleus of an atom?A. ProtonB. NeutronC. Electron

2. How many millimeters are in 1 meter?A. 10 mmB. 100 mmC. 1000 mm

3. Is helium lighter or heavier than air? lighter

4. Ice melts into water. Is this a physical change or a chemical change? Physical

FLASHBACKS!1. How many meters are in 1 kilometer?A. 100 metersB. 1,000 metersC. 10,000 meters

2. Helium’s atomic number is 2. How many protons does an atom of helium contain?A. OneB. TwoC. Four

3. Sodium has an atomic number of 11 and an atomic mass of 23. How many electrons does it have?A. 11B. 12C. 23

4. Aluminum has an atomic number of 13 and an atomic mass of 27. How many neutrons does it have?A. 13B. 14C. 27

FLASHBACKS!1. A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact is a/an:A. LawB. TheoryC. HypothesisD. Experiment

2. What is the formula for volume? V=lwh

3. What are the three subatomic particles found in elements?Protons, neutrons, electrons 4. How many taste buds are on your tongue? 3000

FLASHBACKS!1. The chemical formula for sodium nitrate is NaNO3. It is used in explosives and as a food preservative in hot dogs. What elements make up sodium nitrate?A. Sodium and nobeliumB. Sodium and nitrogenC. Nitrogen and nobeliumD. Sodium, nitrogen, and oxygen

2. Chemical formulas contain subscripts. What is the purpose of a subscript?E. It indicates the number of atoms of each element in a chemical formula.F. It shows the most important element in each chemical formula.G. It ranks the elements from highest to lowest mass in the chemical formula.H. It is used to separate letters in chemical formulas.

3. Which of the following parts of a chemical equation should you change in order to balance an equation?I. SubscriptJ. Chemical formulaK. CoefficientL. Product formed

4. What do ORGANIC COMPOUNDS contain that inorganic compounds do not? CARBON