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91) Which of the following is a sedimentary rock?

Shale is a fine-grained sedimentary rock that forms from the compaction of silt and clay-size mineral particles that we commonly call "mud." This composition places shale in a category of sedimentary rocks known as "mudstones."

92) Which term refers to the sum total of all life on Earth?

The biosphere is the global sum of all ecosystems on Earth.

93) In which type of chemical bonding are electrons shared between adjacent atoms?

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

94) What is the largest planet in our solar system?

The mass of Jupiter is about 2.5 that of all the other planets in the Solar System combined.

95) On what planet is a year shorter than a day?

Venus has the longest rotation period (243 Earth days) of any planet in the Solar System. It orbits the Sun every 224.65 Earth days. So one Venus day is nearly 20 Earth days longer than its year.

96) What astronomical model positioned the Sun near the center of the Universe?

The Copernican model departed from the Ptolemaic system that prevailed in Western culture for centuries, placing Earth at the center of the Universe, and is often regarded as the launching point to modern astronomy and the Scientific Revolution.

97) How long is one Pluto year?

It takes 247.9 Earth years for Pluto to make one orbit around the Sun.

98) Insect bodies have how many major divisions?

All insects have three main body regions: the head, the thorax, and the abdomen.

99) What is the functional unit of heredity?

A gene is a locus (or region) of DNA which is made up of nucleotides and is the molecular unit of heredity. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits.

100) What type of cloud is characterized by thin, wispy strands?

Cirrus is a genus of atmospheric cloud generally characterized by thin, wispy strands, giving the type its name from the Latin word cirrus, meaning a ringlet or curling lock of hair.