What methods do scientists use to predict volcanic eruptions? select all that apply

Observing changes in the shapes of volcanoes, measuring an increased incidence of earthquakes, measuring an increase in heat flow, and measuring an increased occurrence of gaseous emissions.

Explanation:

Volcanic eruption is the output of magma, pieces of rocks, gases and ash due to volcanism. Magma is made up of melted rocks and minerals due to the very high temperatures inside the Earth. Upon contact with the surface through volcanic eruptions, magma is called lava - which, when solidified over time, originates volcanic or magmatic rocks.

When a volcanic eruption occurs, the population that resides in the region can suffer serious damage, for this reason, scientists try to predict these eruptions so that the population can protect itself. Scientists can predict these eruptions by observing changes in the shapes of volcanoes, measuring an increased incidence of earthquakes, measuring an increase in heat flow, and measuring an increased occurrence of gaseous emissions

Types of Estuaries

There are four different kinds of estuaries, each created a different way:  coastal plain estuaries  tectonic estuaries;  bar-built estuaries; and  fjord estuaries.

Coastal plain estuaries are created when sea levels rise and fill in an existing river valley. The Chesapeake Bay, on the East Coast of the United States, is a coastal plain estuary.

Chesapeake Bay was formed at the end of the last ice age. Massive glaciers retreated, leaving a carved-out landscape behind. The Atlantic Ocean rushed to fill in the wide coastal plain around the Susquehanna River, creating a large estuary known as a ria: a drowned river mouth.

Tectonic activity, the shifting together and rifting apart of the Earth's crust, creates tectonic estuaries . California's San Francisco Bay is a tectonic estuary.