Science Experiments

When warm water is poured into a cold glass, thermal stress is created due to the uneven heating of the glass. This stress can cause the glass to crack or shatter due to the expansion and contraction of the material. Rapid changes in temperature can lead to the glass failing under the strain.

One example of a property that remains constant regardless of sample size is density. Density is the mass of a substance per unit volume, and it stays the same no matter how much of the substance is present.

The four most abundant elements in the human body are:

oxygen: 65%
carbon: 18%
hydrogen: 9.5%
nitrogen: 3.2%

There are many more elements than those listed, such as calcium, phosphorus, potassium, sulfur, sodium, chlorine, and magnesium.

https://www.thoughtco.com/elements-in-the-human-body-p2-602188

Dormant.

The two main sources of calcium carbonate found in limestone are the remains of marine organisms such as shells, corals, and algae, and chemical precipitation from bodies of water. Over time, these sources accumulate and solidify to form limestone rock.

Yes, oil can dissolve in alcohol because both substances are nonpolar in nature. The nonpolar nature of oil allows it to mix well with nonpolar solvents like alcohol. However, the solubility of oil in alcohol may vary depending on the type of oil and alcohol.

The acid in vomit is typically stomach acid, which is composed of hydrochloric acid. Stomach acid helps break down food and kill bacteria in the stomach. When someone vomits, the stomach contents are brought up, including the acid.

It indicates the number of valence electrons, and atoms must bond in certain ways to fulfill the Octet Rule. If the electronegativities of two elements are known, the type of bond that will form is also known (ionic, polar, nonpolar) and this information can be crossed with the dot diagram to tell in what ratio exactly the two elements will bond to form compounds.

"Unearthing the Effects of Erosion: A Study on Soil Degradation"

An atom is composed of a nucleus containing protons and neutrons, surrounded by a cloud of electrons. The protons have a positive charge, neutrons are neutral, and electrons carry a negative charge. The protons and neutrons are tightly packed in the nucleus, while the electrons move around the nucleus in electron shells or energy levels.

Pressure changes more rapidly with height compared to density. This is because pressure decreases exponentially with height due to the decrease in the weight of air above, while density decreases more gradually with height as a result of the decreasing number of air molecules.

There is no scientific evidence to support the existence of a hidden land in the center of the Earth. The Earth's core is composed of molten iron and nickel, making it impossible for a habitable landmass to exist there.

If a potato slice is placed in tap water, the potato will absorb water through the process of osmosis. This causes the potato cells to swell and the slice to increase in size. The potato slice may also become softer due to the increased water content.

When a metal is burned, it can form metal oxides by reacting with oxygen in the air. For example, when iron is burned, it forms iron oxide (rust).

It is a metallic element in the alkali family

The sunlight is needed for photosynthesis. The plant takes in carbon dioxide and water, and the sunlight causes a reaction where sugar is made. The plant does not need the oxygen, so it "breathes" it out. The sugar is used by the plant as food.

Window glass can break at wind speeds as low as 30-45 mph. The exact wind speed depends on factors like the size of the window, the quality and thickness of the glass, and the structural integrity of the building. High wind speeds can create pressure imbalances that can cause windows to break.

rotation

Yes! Because water is used to make glucose (by photosynthesis) a shortage of water could and would directly affect the process of photosynthesis. When there is no water, the guard cells close the stomata in order to conserve water, this action shuts of the plants supply of carbon dioxide, slowing the rate of photosynthesis, and if not given water the plant will run out of simple sugars and starch and die.

Magma forms when rocks in the Earth's mantle melt due to high temperature and pressure. This typically occurs at depths of 50-200 km beneath the Earth's surface.

anything that falls under the category "organic".

they're too many to list here but the most common would be:

saccharide (sugar)

hydrocarbon (petroleum/methane etc.)

Obsidian, which is volcanic glass, is a good example.

Aluminum (III) Telluride

To separate cornstarch, salt, and rocks, you can first mix them with water to create a suspension. The cornstarch will settle at the bottom, while the salt will dissolve in the water. Then, you can use filtration to separate the rocks from the mixture. Finally, you can evaporate the water to retrieve the salt.