8th grade Science EOG Review Part 1

Front

What group of elements will chlorine most readily bond with?

Back

Chlorine has 7 valence electrons and will most readily bond with Group 1 elements, which have 1 valence electron.

Front

What is the most accurate method scientists use to predict the age of the earth?

Back

Radioactive Dating is the most accurate method used by scientists to determine the age of the earth.

Front

What increases genetic variation in a population?

Back

An increase in mutations can lead to greater genetic variation within a population.

Front

Which of the following is classified as an element?

Back

Iron is classified as an element, while salt, water, and air are compounds or mixtures.

Front

How can genetic variation result from environmental changes?

Back

An arctic fox changes its color over time as it migrates to a different climate, demonstrating genetic variation due to environmental changes.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that determine its chemical properties and bonding behavior.

Front

What is radioactive dating?

Back

Radioactive dating is a method used to determine the age of materials by measuring the decay of radioactive isotopes.

Front

What is genetic variation?

Back

Genetic variation refers to the differences in DNA sequences among individuals within a population.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the significance of mutations in evolution?

Back

Mutations introduce new genetic variations, which can lead to adaptations and evolution in a population.