Download A Winter Inquiry Land Answer Key - Science - Miami

Alfred Wegener
Charles Darwin
Heinrich Hertz
A
SCIENCE
Winter
Inquiry Land
Answer Key
Grade 7
Winter 2015 – 2016
Miami-Dade County Public Schools
Office of Academics and
Science Winter Packet 2011 – 2012
Transformation
Chemistry
1
THE SCHOOL BOARD OF MIAMI-DADE COUNTY, FLORIDA
Ms. Perla Tabares Hantman, Chair
Dr. Dorothy Bendross-Mindingall, Vice Chair
Ms. Susie V. Castillo
Dr. Lawrence S. Feldman
Dr. Wilbert “Tee” Holloway
Dr. Martin Karp
Ms. Lubby Navarro
Ms. Raquel A. Regalado
Dr. Marta Pérez Wurtz
Mr. Logan Schroeder-Stephens
Student Advisor
Mr. Alberto M. Carvalho
Superintendent of Schools
Ms. Maria L. Izquierdo
Chief Academic Officer
Office of Academics and Transformation
Dr. Maria P. de Armas
Assistant Superintendent
Division of Academics
Mr. Cristian Carranza
Administrative Director
Division of Academics
Department of Mathematics and Science
Dr. Ava D. Rosales
Executive Director
Department of Mathematics and Science
ANSWERS
Energy – It’s Flowing All Around Us
 Nuclear energy – Potential Energy stored in the nucleus of an atom — the energy that
holds the nucleus together. Very large amounts of energy can be released when the nuclei
are combined or split apart. Nuclear power plants split the nuclei of uranium atoms in a
process called fission. The sun combines the nuclei of hydrogen atoms in a process
called fusion. (Type: Potential energy)
 Chemical energy – Potential Energy stored in the bonds of atoms and molecules.
Batteries, biomass, petroleum, natural gas, and coal are examples of stored chemical
energy. Chemical energy is converted to thermal energy when we burn wood in a fireplace
or burn gasoline in a car's engine. (Type: Potential energy)
 Radiant energy - electromagnetic energy that travels in transverse waves. Radiant energy
includes visible light, x-rays, gamma rays and radio waves. Light is one type of radiant
energy. Sunshine is radiant energy, which provides the fuel and warmth that make life on
Earth possible. (Type: Kinetic energy)
 Thermal energy - or heat, is the vibration and movement of the atoms and molecules
within substances. As an object is heated up, its atoms and molecules move and collide
faster. Geothermal energy is the thermal energy in the Earth. (Type: Kinetic Energy)
 Electrical energy - delivered by tiny charged particles called electrons, typically moving
through a wire. Lightning is an example of electrical energy in nature, so powerful that it is
not confined to a wire. (Type: Kinetic Energy)
Sources answers may vary depending on source of electricity/power plant
 Solar
 Hydroelectric energy
 Wind energy
 Oil
 Coal
 Natural gas
 Uranium
FPL uses a diverse mix of fuels at our power plants to generate reliable electricity.
Because of our fuel mix, FPL is recognized as a clean energy company, with one of the
lowest emissions profiles among U.S. utilities. FPL’s carbon dioxide emissions rate, for
example, is 35 percent better than the industry average. FPL currently obtains most of our
electricity from clean-burning natural gas. Nuclear power, which produces no greenhouse
gas emissions, is responsible for another significant portion of power production. In
addition, FPL has begun operation of three commercial-scale, emissions-free solar energy
facilities in the Sunshine State.
Science Winter Packet
Grade 7
Page 1
Happy New Year! The Origin of and Science Behind Fireworks
Statement
1
Agree
Before
Answers
will vary
2
Disagree
Before
Answers
will vary
3
Agree
After
4
Disagree
After
1. Fireworks are fairly new and were
invented in the United States
X
2. Noble Gases are frequently used in
fireworks because of their ability to glow.
X
3. Fireworks contain several elements that
are metals.
X
X
4. Metals increase the explosion in
fireworks.
5. Through chemical reactions, sparklers
form bright light and firecrackers explode.
X
6. Pyrotechnics is the science of materials
capable of undergoing self-contained and
self-sustained exothermic chemical
reactions for the production of heat, light,
gas, smoke and/or sound.
X
Science Winter Packet
Grade 7
Page 2
Bending Light
Source: http://www.billnye.com/for-kids-teachers/home-demos/
Sketch: Answers may vary – sample rough sketch at various water levels
Description of what is happening to the light:
The light from the flashlight bends and follows the water out of the hole in the can. The inside of
the can and the surface of the water stream act like mirrors to reflect the beam of light. The light
bounces around inside the water, and follows it wherever it flows.
Science Winter Packet
Grade 7
Page 3