General Science Mixed Quiz: Set 88

When a conductor moves in a magnetic field and a current is induced in it, this rule gives the direction of that induced current.

A beam seen from the side is visible only because tiny particles send some of its light sideways. Light travelling in a straight line cannot enter our eyes unless something redirects it towards us.

This is the thermite reaction, which is highly exothermic: it gives out so much heat that the iron formed comes out molten.

Rotational kinetic energy is ½Iω², and the ring has the larger moment of inertia. For a thin ring about the axis through its centre and perpendicular to its plane, all the mass sits at distance R, so I = MR².

The F2 genotypes come out as 1 TT: 2 Tt: 1 tt, so pure tall plants (TT) and short plants (tt) are equal in number.

One parsec equals about 2,06,265 astronomical units, which rounds to 2 × 10⁵ A.U.

In boiling, bubbles of vapour form throughout the liquid; in evaporation, only molecules at the surface escape.

Together the two resins take out every dissolved ion, which leaves demineralised water. In the cation exchange resin (written RH), metal ions such as Ca2+, Mg2+ and Na+ are swapped for H+ ions.

Steel is an alloy of iron with a small amount of carbon, and carbon is a non-metal. Ordinary steel carries roughly 0.05 to 2 per cent carbon.

Marie Curie discovered radium; the first two pairs have their discoveries swapped. Marie Curie and Pierre Curie discovered the radioactive elements polonium and radium in 1898, and Marie Curie went on to win Nobel Prizes in both physics (1903) and chemistry (1911).

Unsaturated hydrocarbons have a high carbon content and burn with a yellow, sooty flame, while saturated ones usually burn with a clean blue flame.

Marsilea is a water fern, a pteridophyte, and pteridophytes are the first land plants with true vascular tissues, xylem and phloem.

Orangutans shape sticks into tools and use them to pull insects, honey and termites out of holes in trees and logs.

An ordinary filament bulb is filled with a mixture of argon and nitrogen because both are chemically unreactive and will not burn the white-hot tungsten filament.

All four statements are correct; mushrooms show every one of these properties. Mushrooms are the fruiting bodies of fungi.

Both kinds of radiation carry energy that food absorbs as heat, and both are used in everyday kitchens. Infrared radiation is the heat radiation given out by hot bodies: a grill, a toaster, an oven element or glowing coals cook the surface of food mainly by infrared rays.

It is a thin, strap-like muscle that runs across the front of the thigh from the hip bone to the inner side of the knee, and because it crosses two joints it is the longest muscle of the human body; it helps in bending the hip and the knee and…

The ovum released at ovulation is picked up by the fimbriae of the infundibulum and meets the sperm in the ampulla, the wide middle part of the tube, where fusion takes place to form the zygote.

HIV infects and destroys helper T lymphocytes, the white blood cells that coordinate the body's immune response, so immunity steadily collapses.

Red biotechnology is the branch applied to medicine and health care, including the making of insulin, antibiotics and vaccines. Biotechnology is often divided by colour according to its field of use.