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When the water retreats from the area shown in the photograph, sediments that remain are referred to as __________ deposits.

A comet has a tail because

During a particularly cold winter in Florida, temperatures remained below freezing for several weeks. To avoid freeze damage to the crops, farmers used well water to continuously spray and maintain a protective coating of ice around the crops. Shortly after this long cold snap, sinkholes began forming throughout the region. Were these events linked?

The star that has longest life span because of its size and rate of fuel consumption is known as a __________ star.

Which of the following hormones is secreted by the placenta?

The volume of water that goes past a specific point of a stream or river is the

Spectral lines can act like a __________ to help astronomers identify the chemical __________ of the electromagnetic radiation characteristics of a star.

Modern radio telescopes consist of a dish that __________ incident __________ energy to a focus where instruments collect and analyze the energy.

One way to mitigate flooding is to build __________, which are areas that are intended to flood and, as such, are not zoned for buildings.

If someone were to dump chemicals into a dry river, such as the one shown below, those chemicals would