8th Grade Science Fall Semester Exam

Front

At which location on the plant does adhesion allow it to intake water from the soil?

Back

Roots

Front

The periodic table is divided into rows called ____.

Back

periods

Front

A shorter wavelength means a _____ frequency. These waves have more _____.

Back

higher, energy

Front

How does the chemical formula of O₂ indicate that it is an element?

Back

It only has one type of atom.

Front

How many atoms of oxygen are present in the reactants of the following equation?

Back

18

Front

What is the definition of adhesion in plants?

Back

Adhesion is the attraction between water molecules and other substances, allowing water to move through plant tissues.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What are the three states of matter?

Back

Solid, liquid, gas.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction; it is conserved.

Front

What is the function of stomata in plants?

Back

Stomata are small openings on the surface of leaves that allow for gas exchange, including the intake of carbon dioxide and the release of oxygen.