Sem1 Final Exam Enriched Science

Front

What are constants in an experiment?

Back

Constants are the factors in an experiment that remain the same throughout the experiment to ensure that the results are valid.

Front

What is a hypothesis?

Back

A hypothesis is a possible explanation for a problem that has not yet been tested.

Front

What describes the strength of an ionic bond?

Back

The strongest ionic bond occurs when each atom receives a 'permanent' octet.

Front

What is the number of protons in an atom?

Back

The number of protons in an atom determines its identity and is found in the atomic number on the periodic table.

Front

How many protons are in a sodium atom (Na)?

Back

Sodium has 11 protons.

Front

What is the role of sunlight in plant growth experiments?

Back

Sunlight is a constant factor that provides energy for photosynthesis, ensuring that all plants receive the same light conditions.

Front

What is the difference between a theory and a hypothesis?

Back

A theory is a well-tested explanation of a phenomenon, while a hypothesis is a proposed explanation that has yet to be tested.

Front

What is the atomic mass of an element?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is an ionic bond?

Back

An ionic bond is a chemical bond formed between two ions with opposite charges, typically between a metal and a non-metal.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.