What causes the huge amount of inward pressure when a star begins to form?

A) heat

B) gravity

C) electromagnetic attraction

D) none of these

What ions are possible for the two largest stable elements in Group 4A (14) ? How does each arise?

Which of the following happens during a chemical change? Check all of the boxes that apply. One atom or more changes into atoms of another element. New substances with different properties are formed. Solids, liquids, or gases may form.

What is the difrense between soft water and hard water?

What is the total number of atoms in molecule hno3?

Land features, such as Palo Duro Canyon in Texas, are shaped by the gradual wearing away due to Question 5 options: gravity. faulting. water erosion. mountain building.

In a closed system, the total heat given off by warmer substances equals the total heat energy gained by cooler substances (qwater = - qliquid).

What compound will not give oxygen on heating

Choose one property of water that makes it unique. Describe the property and explain the chemical or physical?

An object is dropped onto the moon (g m = 5 ft/s 2). how long does it take to fall from an elevation of 250 ft.?

Which type of luster gives the mineral the appearance of metal?