7th Grade Science Comprehensive Flashcard

Front

What is a reactant in a chemical equation?

Back

A reactant is a substance that undergoes a chemical change in a reaction. In the equation 2NaHCO3 -> Na2CO3 + CO2 + H2O, NaHCO3 is the reactant.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Front

What are the horizontal rows on the periodic table called?

Back

The horizontal rows on the periodic table are called periods.

Front

Which subatomic particle has a positive charge?

Back

The proton is the subatomic particle that has a positive charge.

Front

What heats up faster, land or water?

Back

Land heats up faster than water.

Tags

NGSS.MS-ESS2-6

Front

What is the relationship between carbon dioxide levels and Earth's surface temperatures?

Back

Higher carbon dioxide levels mean more heat is retained in Earth's atmosphere, leading to increased surface temperatures.

Tags

NGSS.MS-ESS3-5

Front

What is the definition of a proton?

Back

A proton is a positively charged subatomic particle found in the nucleus of an atom.

Front

What is the definition of a neutron?

Back

A neutron is a subatomic particle found in the nucleus of an atom that has no charge.

Front

What is the definition of an electron?

Back

An electron is a negatively charged subatomic particle that orbits the nucleus of an atom.

Front

What is the definition of a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Tags

NGSS.MS-PS1-1

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of chemical elements, organized by their atomic number, electron configuration, and recurring chemical properties.

Tags

NGSS.HS-PS1-1