An incandescent light bulb converts electricity into light by sending electricity through a filament, and fiber optics works by carrying light along hair-thin filaments of glass. Given these facts, an incandescent light bulb converts electricity into light by sending electricity through what among the following options: - hair-thin molecules  - hair-thin spokes  - epidermis and dermis  - hydrogen and oxygen  - activation energy  - an electron lens  - hair-thin hairs  - hair-thin fibers of glass
hair-thin fibers of glass

All animals are heterotrophs, and all fish are heterotrophic. Given these facts, what are all fish among the following options: - wet  - protected  - sharks  - food  - fins  - animals  - eggs  - good
animals

Some viruses have an envelope of phospholipids and proteins, and enveloped viruses make their own membranes. Given these facts, some what make their own membranes among the following options: - fungi  - insects  - viruses  - mammals  - fur seals  - humans  - animals  - sharks
viruses

Atape measure is used to measure length, and length The Base unit for length in the metric system is the meter . Given these facts, what is used to measure the base unit of the metric system which is the meter among the following options: - solid, liquid, gas  - A laser  - A measuring cup  - bottom of feet  - A tape measure  - focusing a lens  - Time and energy  - A level

A tape measure