Name: ______Period: ______

Date : ______

Science

Semester I Review

1.  How many elements are present in the following compound? Na₃PO₄

2.  Hydrogen Peroxide has the chemical formula H₂O₂. How many total atoms of hydrogen and oxygen are in one molecule of H₂O₂?

3.  An element is defined as ______

4.  Complete the table below with the correct physical properties.

Metal / Non-Metal / Metalloid
Shiny (luster) / dull / Shiny or dull
Poor conductor of heat and electricity / Conducts heat and electricity
Magnetic / Not Magnetic

5.  I ♥ Density! Density = Mass/Volume

a.  A cube has a volume of 5cmᴣ and a mass of 30 g. What is the density of the cube?

b.  A cube has a volume of 12cm3 and a mass of 48g. What is the density of the cube?

6.  Volume = length x width x height

a.  The sides of a cube measure 2cm. What is the volume of the cube?

b.  The sides of a cube measure 4 cm. What is the volume of the cube?

7.  You have a cube with sides measuring 2cm and a mass of 32g. What is the density of the cube?

8.  Fill in the table with information from each energy source.

Nuclear / Biomass / Geothermal / Wind
Advantages / Inexpensive / Water is free
Disadvantages / Risk due to Terrorist threat / Farmland used for biomass instead of crops / Harmful gases and minerals / Increases the possibility of flooding / Affected by changes in weather- without sun and wind it can’t be used
Renewable / x / √ / √ / √ / √
Non- Renewable / √ / x / x / x / x

9.  Rank the following energy sources by the amount of pollution they put off. 1-3, with 1 being the most and 3 being the least.

a.  Natural Gas (Fossil Fuels) ___

b.  Solar Energy ___

c.  Coal (Fossil Fuels) ___

10.  Energy cannot be created or destroyed. It is simply transferred from one form to another. This is the Law of ______of ______.

11.  Give examples of each form of energy in the table below.

Mechanical / Radiant (Light) / Sound / Chemical / Heat (Thermal) / Electrical / Nuclear

12.  When you plug in a hair dryer, which type of energy transformation occurs?

Electrical à Mechanical à ______

13.  Pizza: energy to run :: flashlight battery : ______.

14.  As you are listening to the radio, which types of energy transformations occur?

______à ______à ______

15.  ______(______) is energy due to the movement or transfer between molecules of different temperatures.

16.  Energy in motion is ______. Energy that’s waiting is ______.

17.  Chemical Energy is energy due to the reaction of two or more ______.

18.  What energy transformations must occur for a person to kick a soccer ball? Draw a diagram, using arrows to show an understanding of the transformation.