How was matter in the universe formed?

Origins. In the first moments after the Big Bang, the universe was extremely hot and dense. As the universe cooled, conditions became just right to give rise to the building blocks of matter – the quarks and electrons of which we are all made.

Will the Law of Conservation of Mass still be true if the sample is in an open system?

Special relativity. In special relativity, the conservation of mass does not apply if the system is open and energy escapes. However, it does continue to apply to totally closed (isolated) systems. If energy cannot escape a system, its mass cannot decrease.

Why can’t matter be created or destroyed?

Matter is anything that has mass and takes up space. Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.

Is conservation of energy always true?

Not always. Nuclear fission and Nuclear fusion are the reactions which contradicts it. Because there mass-energy transition occurs which means some energy will be converted to mass and vice-versa.

Which of the following is true of the conservation of energy in a closed system?

Which of the following is true of the conservation of energy in a closed system? Total energy is always conserved. 2. The mechanical energy of a system of objects is a, the sum of kinetic energy and gravitational potential energy.

Can energy be created or destroyed?

The law of conservation of energy states that energy can neither be created nor destroyed – only converted from one form of energy to another.

What is true of the total mass of reactants compared to the total mass of products?

The law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. Because atoms are rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products.

What is always true according to the law of conservation of matter?

According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change.

What is always true about energy?

The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed.