CAST Review 2025

Front

Which rock is created by heat and pressure?

Back

Metamorphic rock is formed through the alteration of existing rock types (igneous, sedimentary, or other metamorphic rocks) under heat and pressure.

Front

What is the principle of conservation of mass?

Back

The principle of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it remains constant.

Front

What type of bond forms when atoms share electrons?

Back

Covalent bond is formed when two atoms share one or more pairs of electrons.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object with respect to time.

Front

What does the Octet Rule state?

Back

The Octet Rule states that atoms tend to react in such a way that they have eight electrons in their outermost shell, achieving a stable electron configuration.

Front

What is an igneous rock?

Back

Igneous rock is formed from the solidification of molten rock material (magma or lava).

Front

What is a sedimentary rock?

Back

Sedimentary rock is formed by the accumulation and compaction of mineral and organic particles, often in layers.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Front

What is the formula for calculating acceleration?

Back

Acceleration (a) can be calculated using the formula: a = (final velocity - initial velocity) / time.

Front

What is the significance of the outermost energy level in atoms?

Back

The outermost energy level determines an atom's reactivity and bonding behavior with other atoms.