They state the final question in a way that can be answered by investigation or experiment. A good scientific question is: “What effect does the pH of water have on radish seed germination?” Good scientific questions are defined, measurable, and controllable.

20 biggest science questions answered

• 1 What is the universe made of?
• 2 How did life begin?
• 3 Are we alone in the universe?
• 4 What makes us human?
• 5 What is consciousness?
• 6 Why do we dream?
• 7 Why is there stuff?
• 8 Are there other universes?

TOY CARS:

• How does the weight of a toy car affect the distance the car rolls down a ramp?
• How does the size of the wheels affect the distance a toy car rolls down a ramp?
• How does the height of a ramp affect the distance a toy car rolls?
• How does adding weights affect the distance a toy car travels?

Untestable: What makes something sink or float? Testable: How well do different materials sink or float in water? Testable: Does temperature have an effect on a magnet’s strength?

5 DIY Ways to Insulate Your Home on the Cheap

1. Cover any air leaks with weatherproofing. Use weatherproofing strips and caulking to seal any air leaks in your doors and windows.
2. Add thick curtains to your windows.
3. Fix drafty doors with a door snake.
4. Plug your chimney when not in use.
5. Seal your attic air leaks.

It’s mold-, moisture- and fire-resistant as well. Cellulose spray is made from recycled paper products, primarily newsprint, and is the most environmentally friendly insulation option out there, with a recycled material content of 85%….Non-Fiberglass Spray Insulation

• Icynene.
• Soy.
• Cellulose.
• Polystyrene.

Use natural materials, if possible, in areas of the house with low or no moisture. Options include cotton from post-industrial scrap denim, sheep’s wool, hemp and cellulose from recycled newspaper, and other natural fibers. Keep in mind that cellulose insulation runs the risk of settling over time.

Insulators have strong bonds that hold their particles rigidly in place. This prevents particles from gaining energy and increasing the temperature. Wool, dry air, plastics, and polystyrene foam are all examples of good insulators. Materials that do not insulate well are called conductors.

Non-Toxic Mineral Wool Brands 1. Rockwool (formerly Roxul) is the most common and accessible mineral wool insulation. They have a newer version called AFB evo, that does not contain formaldehyde. The binder is an undisclosed polymer (a plastic, likely acrylic), it also contains mineral oil.

1. Fire Resistant. Unlike fiberglass which melts around 1,200°F, mineral wool has an extremely high melting point and can withstand fires up to 2,000°F making it one of the safest forms of insulation when it comes to house fires.

The chemicals using in spray foam can be immediately hazardous to a person’s health if not properly handled. Workers must use the right protective gear to shield their eyes, nose, and throat from the damaging VOCs in the isocyanate. They avoid all skin contact with the chemicals.

Myth: Glasswool contains formaldehyde which is dangerous Glasswool insulation products are made with organic binders and therefore contain trace amounts of free formaldehyde. However, the levels of free formaldehyde for Bradford insulation products have been measured and found to be very low.

“Pink® Batts® fibres can get into your lungs, right? Sure it’s possible, but it’s very, very unlikely. And even if a few do, they’re not dangerous to humans because they’re biosoluble – which means they dissolve in your bodily fluids.

For more than 60 years, fiber glass insulation has been manufactured with a binder that contains formaldehyde. It’s been used throughout the world as a safe and effective insulation material.

The chemical formaldehyde is used to preserve bodies. Formaldehyde changes the tissue on a molecular level so that the bacteria can’t feed on the tissue.

Formaldehyde is a potent, colorless gas that is commonly used in hospitals, medical laboratories, dental offices, and pediatric practices as a preservative, sterilizer, and disinfectant.

A toxic body may manifest a variety of signs and symptoms:

• Skin problems (rashes, acne, etc.)
• Food and scent intolerances.
• Constipation, diarrhea, and other digestive issues.
• Frequent colds and viruses.
• Unexplained headaches.
• Lower back pain.
• General aches and pains.
• Fatigue and low energy.

When formaldehyde is present in the air at levels exceeding 0.1 ppm, some individuals may experience adverse effects such as watery eyes; burning sensations in the eyes, nose, and throat; coughing; wheezing; nausea; and skin irritation.

The CDC reports that formaldehyde levels reduce over time and that most is released within two years. However, for newer homes with better insulation, less air movement may cause levels to remain for longer.

How to minimize risks associated with formaldehyde exposure:

1. Establish a no smoking policy in your home.
2. Clean chimneys and wood burning appliances.
3. Keep idling gas engines away from the home.
4. Buy solid wood furniture, or be sure pressed wood products are sealed.
5. Increase ventilation during painting projects.

You might not get sick if you breathe or touch formaldehyde, but if you have breathed or touched formaldehyde you may have symptoms such as • sore, itchy, or burning eyes, nose, or throat; • skin rash; or • breathing symptoms such as chest tightness, coughing, and shortness of breath.