Electricity
What kind of circuit does electricity need in order to flow?
Closed circuit/complete path
How does a circuit breaker prevent fires?
There is a spring that creates an open circuit if too much energy is flowing through the circuit.
Ecosystem
Magnetic force is strongest at the ______.
poles
Positive particles in an atom?
Negative particles?
Neutral particles?
Proton, Electron, Neutron
What things could cause electricity to not flow?
A gap in the circuit, light bulb taken out in a series circuit, loose wire, etc
What types of energy can electrical energy be converted into?
Heat, light, sound
Traits that organisms develop over time to help them survive? Name 2 examples.
Adaptations, such as a duck's webbed feet, giraffes' long necks, an elephant's trunk, etc
What material does a magnet attract?
Iron
Tiny particles that make up all matter are called _____.
atoms
Using the symbols we used in class, draw a closed series circuit, including a switch and 1 light bulb on the white board.
Answers may vary
Name 3 things we can do to stay safe from lightning during a storm.
Avoid high places, get out of the water, don't use electronic devices
The job that an organism plays in its environment? Give an example.
Niche. Example: the way that animals get food and shelter
What is the space around a magnet where the force of the magnet acts called?
Magnetic field
What type of energy uses nuclear fission to create electrical energy?
nuclear energy
Using the symbols we used in class, draw a closed parallel circuit, including a switch and 2 light bulbs on the white board.
Answers may vary
Briefly explain lightning formation. Remember there are 3 major steps!
1)Charges separate
• High winds cause water & ice particles to rub together, and the positive and negative charges separate
2) Charges gather
• Positive (+) particles gather at the top because they are lightweight
•Negative (-) particles gather/settle at the bottom because they are heavier
•Both build up, more and more, until the build up is too great
3) Charges jump
• Charges jump between the cloud (- charge) and the ground (+ charge)
• This creates a discharge, otherwise known as lightning, which is “grounded” when it touches the ground
What are the nonliving factors of an environment called? The living factors? Name an example of each.
Living (Biotic): grass, trees, fish, frogs, etc
Nonliving (Abiotic): soil, water, rocks, etc
What would happen if you put two north poles of a magnet together? What would happen if you put two opposite poles together?
Same poles: they will repel.
Opposite poles: they will attract.
Draw an atom with 6 protons, 6 neutron, and 5 electrons.
What is the charge of the atom?
Drawings will vary. Atom has a charge of +1.
What is the difference between a conductor and an insulator? (Define them)
Name 3 conductors and 3 insulators of electricity.
A conductor allows electricity to flow through it more easily. An insulator does not allow electricity to flow through easily.
Insulators: wood, string, rubber, eraser, tape, etc
Conductors: pencil lead, copper, paper clip, thumbtack, etc
Name 2 similarities and 2 differences between static electricity and current electricity.
Differences: Static electricity produces a discharge of electrons, current electricity is flow of electrons. Static electricity develops on the surface of an insulator, while current electricity flows through conductors. Static electricity is released in one discharge, while current electricity can flow continuously
Similarities: Both create energy via electrons and attraction, work with conductors and insulators, the build up of negative charges
Put these in order from largest to smallest. Define each as you go.
1. Population
2. Ecosystem
3. Community
1. Ecosystems contain all living and nonliving parts of an environment.
2. Community is made up of all of the organisms that live in a place.
3. A population is a group made up of the same species in the same ecosystem.
What is a device that produces magnetism through an electric current called? Name an example.
Electromagnet; a junkyard crane
What are fossil fuels? Name an example.
What are renewable energies? Name 2 examples.
Fossil fuels: resources that cannot be replaced once they're used up, such as coal, oil, and natural gas.
Renewable energies: resources that can quickly be replaced, such as hydroelectricity, solar energy, wind energy, and geothermal energy.