General Science I Sem. ReviewThe

Scientific Method

Measurement The Gas Laws

The Atom and Periodic

Table

Ionic and Covalent Bonds

100 100 100 100 100

200 200 200 200 200

300 300 300 300 300

400 400 400 400 400

500 500 500 500 500

Final Jeopardy

The Scientific Method 100

• Define hypothesis.

• A testable statement.

• Ex) If you wear high heels instead of running shoes, then you won’t run as far.

Back

The Scientific Method 200

• Define observation.

• A statement made using the senses.

• Ex) The flame is blue and 700oC

Back

The Scientific Method 300

• What is the difference between a qualitative observation and a quantitative observation?

• Qualitative- qualities of the object• Quantitative- quantities/numbers of the

object Back

The Scientific Method 400

• Is the following a qualitative or a quantitative observation:There are 82 paper clips on the ground.

• Quantitative- there was a quantity or numbers involved.

Back

The Scientific Method 500

• In an experiment, you control things and you vary things. Define control and variable.

• Control- everything you keep the same in the experiment.

• Variable- the ONE thing you change in the experiment.

Back

Measurement 100

• What is each letters’ metric prefix? K H D _ d c m

• Kilo- ; Hecto- ; Deka- ; _ ; deci- ; centi-; milli-;

Back

Measurement 200

• DAILY DOUBLE!!!!

• Convert 50cm to m.

• KHD_dcm

m is in the middle… 0.5 m Back

Measurement 300

• What is the unit for temperature in science?

• Celsius

Back

Measurement 400

• Define mass.

• The amount of matter in an object.

Back

Measurement 500

• Define volume.

• How much space an object takes up.

Back

The Gas Laws 100

• Define diffusion.

• When particles move from an area of high concentration to low concentration.

Back

The Gas Laws 200

• State Boyle’s Law

• “Boyle is at PV”• As pressure goes up, volume goes down. They’re

opposites.

Back

The Gas Laws 300

• State Charles’ Law

• “Charles had a TV”• As temperature goes up, volume goes up. They do the

same thing.

Back

The Gas Laws 400

• Boyle’s Law or Charles’ Law?A hot-air balloon

• Charles law (increase T of air in the balloon, it inflates; hot air rises, so balloon goes up in the air. Cool it down, it slowly sinks)

Back

The Gas Laws 500

• Charles Law or Boyles’s Law?A bicycle pump

• Boyles’s (Decrease the volume of the launcher and pressure builds up, shooting the potato)

Back

The Atom/PT 100

• Atomic number = Atomic mass - what?

• Atomic number = Atomic mass - NEUTRONS.

Back

The Atom/PT 200

• What is an isotope?

• An atom with a different number of neutrons.

Back

The Atom/PT 300

• Rows on the PT are called _______ and columns are called ___________.

• Rows are “periods” and columns are “families” or “groups”

Back

The Atom/PT 400

• What goes is the blank with the “?”

• 56; Atomic # and Proton # are equal

Back

Element Symbol Atomic # Mass # Protons Neutrons Electrons

Ba ???? 137 ????

The Atom/PT 500

• The most reactive metal is ______.– Francium, sodium, or potassium?

• Francium

Back

Ionic and Covalent Bonds 100

• Ionic bonds _______ (share/transfer) electrons and bond with a _______ (metal/nonmetal) and a _____ (metal/nonmetal)

• Transfer electrons and bond with a metal and a nonmetal

Back

Ionic and Covalent Bonds 200

• Covalent bonds form between a _____ (metal/nonmetal) and a ____ (metal/nonmetal)

• Covalent bonds always form between two nonmetals

Back

Ionic and Covalent Bonds 300

• Write the formula for Sodium bromide. Is this an ionic or covalent bond?

• NaBr… ionic

Back

Ionic and Covalent Bonds 400

• Write the formula for dicarbon hexahydride; is this ionic or covalent

• di=2; hexa=6; C2H6 prefixes mean covalent bond

Back

Ionic and Covalent Bonds 500

• List one property of ionic compounds and one property of covalent compounds.

• Ionic: high melting point, conduct electricity, brittleCovalent: low melting point, poor conductors of electricity

Back

Final Jeopardy

• Chemical ReactionsMAKE YOUR WAGER!

• Cl2 + 4 NaBr 2 NaCl + 2 Br2

Balanced?

Back

Left

Right

ClNaBr

Left

Right

2 Cl 2 4 Na 2 4 Br 4

No