Explanation

• Air is essentially transparent.
• It allows all light to pass through it without scattering or absorbing any of the light.

Explanation

• Fasteners (such as nuts and bolts) actually benefit from friction, as it helps keep them in place.

Disadvantages of friction:

• Energy loss: Friction converts useful energy into non-usable forms like heat.
• Wear and tear: Friction causes moving parts to wear out and deteriorate.
• Speed limit: Friction limits the maximum speed of automobiles.

Explanation

• Fog is a type of cloud that forms at ground level.
• It characterized by a thick cloud of water droplets suspended in the air near the Earth's surface.
• This reduces visibility and creates a misty or foggy condition.

Explanation

• When yeast is added to dough, it ferments the sugars, producing carbon dioxide gas as a byproduct.
• This causes the dough to rise, making it lighter and airier.

Explanation

• Fungi are multicellular organisms, consisting of many cells that work together to form complex structures like mushrooms and molds.
• They have modified cell wall and nucleus.
• They have not chlorophyll.
• Plants are multicellular, composed of many cells that work together to form roots, stems, leaves, and other structures.
• They have modified cell wall and nucleus.
• They have chlorophyll.
• Animals, including humans, are multicellular organisms made up of many cells that work together to form tissues, organs, and systems.
• They have modified nucleus but don't have cell wall.
• They have not chlorophyll.

Explanation

• Venus is the brightest planet.
• It has an atmosphere but no moons.
• It's identical in size, chemistry and gravity.
• It has volcanoes, mountains and sand.
• It's also called Sister Planet of the Earth.

Explanation

• The Sun is so massive that it would take about 1,300,000 Earths lined up side by side to equal the Sun's diameter.
• Alternatively, you could fit approximately 1.3 million Earths inside the Sun.

Explanation

• Iron filings are attracted to the magnetic field of a magnet.
• The magnetic field is strongest at the poles of the magnet.
• Therefore, the iron filings will be attracted more at the poles of the magnet, where the magnetic field is most intense.
• This is why you'll often see iron filings forming a pattern that traces out the magnetic field lines, with the filings clustering at the poles.

Explanation

• The Moon is illuminated because it reflects the light from the Sun.
• The Moon's surface reflects the sunlight, making it visible to us on Earth.

Explanation

• A nail cutter is an example of a Second-class lever.
• Where the load (the nail) is located between the effort (the hand) and the fulcrum (the pivot point of the cutter).