Science is for Kids

This video shows an experiment to compare the reactivity of three different metals in single replacement reactions with HCl and water.  The ranking of how reactive metals are in single replacement reactions is called the activity series. I hope this was helpful!

This video shows footage of a rock being tested for emission of radiation. Three different materials are tested to determine their effectiveness in shielding radiation. The three materials are; paper, a wooden block and sheets of lead.

To understand the evidence that the universe is getting larger, we need to understand the Doppler effect.  This is the reason why a siren from a police car or fire truck has a higher pitch as it is approaching and a lower pitch when it is traveling away from us. The two images below are really useful in trying to better understand the Doppler effect. The first image has a stationary red dot which is giving off waves, which is shown by the concentric blue circles.  The wavelengths of the waves being given off are represented by the distance between the concentric blue circles.  The waves would appear the same to four observers each located at the corners of the square area.  The second image shows waves being produced by a moving object.  In this case, the waves would appear to be different to observers on the right or left side of the square area.  Observers on the left side would observe waves that are stretched out because the object giving off ...

This video shows two plates being measured for emission of radiation. The orange Fiesta plate was made using a glaze which contains uranium oxide. Fiesta dinnerware was produced by the Homer Laughlin China Company of West Virginia. Prior to World War II the glazes used natural uranium.  This practice stopped during the war when the US government seized the company's stock of uranium for the Manhattan Project.  In the late 1950's the Atomic Energy Commission relaxed restrictions on uranium and production practices switched to using depleted uranium to produce the red-orange glaze. The US Environmental Protection Agency recommends that dinnerware produced with uranium glaze should not be used for food, drink or food storage.

This video discusses the six levels of organization in ecology: species, populations, communities, ecosystem, biome and biosphere. I was focusing on Minnesota ecology when I recorded this video I hope this was helpful!

HS-PS4-5. Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.* [Clarification Statement: Examples could include solar cells capturing light and converting it to electricity; medical imaging; and communications technology.] HS-PS4-5. Evidence Statements This performance expectation has students communicating technical information about two devices using varying formats (textual,  graphical, oral and mathematical are listed in NGSS evidence statements.  I'm having my students research two devices (one that relies on the photoelectric effect, a second that depends on wave properties) and then create a screencast video using text, images and narration to teach their classmates about the device they selected. Devices that depend on the Photoelectric Effect: Photovoltaic cells (solar panels) Photocopiers Charge coupled...

This video summarizes an experiment performed to experimentally determine the formula ulnits of magnesium chloride. In the lab the mass of a small sample of magnesium ribbon is measured. The metal is then placed into a beaker and concentrated HCl is added. When the reaction is complete the beaker is heated to drive off water and any unreacted HCl. Safety Note: This should be done in a fume hood to avoid breathing in any HCl fumes! After all the liquid has been removed from the beaker a precipitate of magnesium chloride is left behind. The mass of this compound is measured and compared to the original amount of magnesium to determine the added mass of chlorine. The data collected allows students to calculate the formula units of the magnesium chloride salt. The reaction is summarized by the following chemical equation. 2Mg  +  HCl  → MgCl 2 + H 2 The compound forms with a 1:2 ratio of magnesium to chlorine. This is because magnesium has two valen...