The brain has three main parts-- the brain stem, the cerebellum, and the cerebrum. Let's start with the brain stem. It consists of the midbrain, pons, and medulla oblongata. Located just above the brainstem are the thalamus and hypothalamus.
When you respond involuntarily to a hot object, a reflex arc begins when sensory neurons in your hand detect pain. Sensory neurons then carry information in the form of a nerve impulse to the spinal cord.
The backbone encases the spinal cord, a bundle of nerves that play a key role in the central nervous system.
Nerve impulses move across spaces called "synapses" via specific chemical messengers referred to as "neurotransmitters." Special structures located on the ends of axons release neurotransmitters into the synapse when an impulse is received.
This is a phenomenon video for Strand 3. Science Phenomena: 3rd grade - Forces and Interactions
This is a phenomenon video for 3.3.1. Science Phenomena: 3rd grade - Forces and Interactions
This problem introduces repeated doubling in the context of a plant with branches that split into 2 more branches every week. The problem lays the foundation for understanding exponential growth and lends itself to a variety of representations. The Teachers' Notes page offers rationale, suggestions for implementation, discussion questions, and ideas for extension and support.
A black hole is created when an extremely large star has a supernova explosion and the remaining core is swallowed by its own gravity. The gravitational forces within a black hole are so strong light is not able to escape.
Temperatures can reach 15 million degrees Celsius at the center of the sun.
As a comet orbits the sun, solar wind pushes the gases outward in a trailing tail.
Constellations are groups of stars that look like animals, people, or objects.
Distances in the solar system are great.
Giant stars have a diameter of 10 to 100 times the size of the sun. White dwarfs are smaller stars that can be smaller than Earth.
A meteor is a meteoroid that strikes Earth's surface.
The sun is the center of the solar system around which Earth and the other planets orbit. The planets travel in an ellipse around the sun.
The sun is the center of the solar system around which Earth, the other plants, and their moons revolve. Inertia causes planets to remain in motion. The pull of gravity between the sun and planets keeps the planets from flying off into space.
A supernova is a huge explosion that results when a massive star has burned up most of its fuel and breaks apart. The resulting core can form a smaller, dense star called a neutron star.
UEN Homeroom wants to help you get burned in with education. This week we welcome Amber Harper, the Burned In Teacher, to talk about teacher burnout and how to re-energize educators. Our topics include: the reasons that teachers suffer from burnout, the three types of burnout and their characteristics, how to overcome anxiety and frustration as a teacher and more.
This book explores how to support student sensemaking of science concepts. It includes specific vignettes, examples, and practical suggestions for implementing in the classroom.
Through a close reading of "Amelia Bedelia", students reread the material to discuss text-dependent questions, promoting deep thinking about the text and its characters.