A conductor allows electrons to move freely and an insulator blocks their movement. In this video, I test several different objects to see if they are insulators or conductors.
For example, is a pickle a conductor or an insulator?
I answer these questions by hooking up an electrical current.
Is copper a conductor?
Is wood an insulator?
Plastic Conductor or insulator?
Aluminum Insulator or not?

What makes a trapezoid a trapezoid? A trapezoid has two parallel sides and two nonparallel sides.
A trapezoid is a quadrilateral because it has four sides.
I also cover,
How to find the area of a trapezoid
The median
How to identify a trapezoid
The shape of a trapezoid
Number of sides
Is a trapezoid a parallelogram?

How are plant cells and animal cells similar and different? There is a great variety and plants and animals found on earth. If you look at a plant cell and an animal cell you will see they have similarities and difference.
Let’s first focus on how they are similar.
They are both considered eukaryotic cells because they both contain a nucleus and membrane bound organelles.
They have many of the same organelles, they both contain a rough and smooth er
Golgi body, mitochondria they both have ribosomes which create proteins. Technically ribosomes are not organelles because they are not membrane bound
In addition, animal and plant cells contain a cytoskeleton and cytoplasm,
Both plant and animal cells contain a cell membrane.
Next, let's focus on some of the differences.
A plant cell has a cell wall. The cell wall is a rigid outer covering of a plant cell that provides structure and protection.
Animal cells do not have a cell wall.
A plant cell has chloroplasts. Chloroplasts are the location of photosynthesis which allows the plant to convert sunlight into sugar The mitochondria found in the plant cell then uses this sugar to create energy.
Plants have a large central vacuole compared to an animal cell that contains smaller vacuoles.
Plants cells do not have lysosomes and animal cells do have lysosomes.
Lysosomes help animals break down large molecules, old cell parts and sometimes large macromolecules that get past the cell membrane. The cell wall of a plant keep these large molecules out and plant cells have lytic vacuoles that perform a similar function of the lysosomes in animals.
Plant cells contain plastids and animals do not have plastids.
The plastids of plants take several forms. The following is a picture of several of the different plastids found in a plant.
Plants do not have centrosomes and animals do. Centrosomes are the microtubule organizing and construction center and help spindle fibers attach to the chromosomes during mitosis
So there you go Some of the similarities and difference of a plant and animal cell.

Newton's third law of motion is all around us. In this video, I show real-world examples of the 3rd law of motion.
Why is Newton's third law of motion important?
For every action, there is an equal and opposite reaction.
For example, when you skateboard and push backward, the opposite reaction is to drive the skateboard forward.
A jet moves forward when the exhaust moves backward. Another example of an opposite reaction to a force.
Other examples include paddling a boat, jellyfish, basketball, and a trampoline.
By watching these examples it will give you a better understanding of how motion works.

Voluntary and Involuntary muscles
Our muscular system allows us to move inside and outside.
Humans have an amazing range of movement.

There are two major types of muscular movement.
Voluntary and involuntary

Let’s look at the typing to help understand the difference between voluntary and involuntary muscles.

When we control the muscles in the hands and arms and tell the muscles which keys to press, these movements would be considered voluntary
At the same time, cardiac muscles of the heart, and muscles that help you breathe are working automatically to keep you alive..
These muscle movements are involuntary.

The motor cortex is the region of the cerebral cortex involved in the planning, control, and execution of voluntary movements.
Your brain sends signals down the central nervous system and then the peripheral nervous system to stimulate muscle movement.

Involuntary muscles run automatically. There are two major types.
Our smooth muscles and our cardiac or heart muscle.

Involuntary muscles are controlled in the medulla oblongata which is located in the brainstem,
This portion of the brain controls involuntary movements such as breathing, digestion, heart rate, and more.
In summary, muscles we can control are voluntary
and our automatic muscles are involuntary muscles.

Learn how to solve 60% of 40 and other percent problems. I solve the following percent of problems.
20% of 60
20% of 40
15% of 40
15% of 60

The Golgi body is vital for the health of a cell. It is sometimes described as a post office, or a distribution center because it repackages proteins and chemicals and ships them to locations in the cell.
The Golgi body which is also called the Golgi apparatus is found in eukaryotic cells.
The Golgi body receives proteins from the rough er and repackages the proteins and chemicals into vesicles that are sent out to three locations. Some vesicles become lysosomes, others travel to the cell membrane and provide proteins for the membrane, and other vesicles travel outside the cell-like vesicles containing insulin so it can be released into the bloodstream.

Friction is the force that opposes motion between any surfaces that are in contact. There are at least four types of friction: static, sliding, rolling, and fluid friction. Static, sliding and rolling friction occur between solid surfaces. Fluid friction occurs in liquids and gases

Static friction occurs when an object is resting on a surface. The static friction between the boots and the snow allows this person to stand and shovel snow.
When you rub your hands together you experience sliding friction.
When you ride a bike you depend on the rolling friction of the tires.
Sky diving depends on fluid friction between the air and the parachute to slow down.

In this video, I cover many real-life examples of friction and how friction helps you in everyday life.

Vertical Angles Explained
Vertical angles in Geometry occur when two lines cross one another. The lines share a common vertex and are opposite each other.
Vertical angles are congruent which means the angle measure is equal. In addition two pairs of vertical angles are created when the lines cross.