7th Grade Chemistry Worksheets

📆 Updated: 1 Jan 1970
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🔖 Category: Chemistry

Chemistry can be a complex subject, but with the right tools, learning becomes much easier. For 7th grade students studying chemistry, having access to well-designed and comprehensive worksheets is essential. These worksheets provide a valuable resource to reinforce key concepts, practice problem-solving skills, and enhance understanding of this fascinating scientific field.



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Multiplication Arrays Worksheets Grade 2
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Glencoe Science Book 7th Grade
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Bill Nye Video Worksheet Answer Key to Sound Waves
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Science Notebook Cover Coloring Pages
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More Chemistry Worksheets




What are the three states of matter?

The three states of matter are solid, liquid, and gas.

What is an atom?

An atom is the basic unit of matter that consists of a nucleus containing protons and neutrons, surrounded by electrons orbiting in energy levels. Atoms are considered the building blocks of all substances and combine to form molecules through chemical reactions.

How is an element different from a compound?

An element is a pure substance composed of only one type of atom, such as oxygen or iron, whereas a compound is a substance composed of two or more different elements chemically bonded together, such as water (H2O) or salt (NaCl). Elements cannot be broken down into simpler substances by chemical reactions, while compounds can be broken down into their constituent elements through chemical reactions.

What is the law of conservation of mass?

The law of conservation of mass states that in a closed system, mass cannot be created or destroyed, only rearranged or transformed. This means that the total mass of substances before a chemical reaction must equal the total mass of substances after the reaction, regardless of any physical or chemical changes that occur.

What is the periodic table of elements?

The periodic table of elements is a tabular arrangement of all known chemical elements, organized by their atomic number, electron configuration, and chemical properties. It allows for easy visualization and understanding of the relationships between different elements based on their atomic structure and characteristics. The table typically consists of rows called periods and columns called groups, which help categorize elements with similar properties and behaviors.

What is an acid?

An acid is a chemical substance that donates a proton or hydrogen ion in a chemical reaction. Acids typically have a sour taste, turn litmus paper red, and react with metals to form hydrogen gas. They are characterized by a pH level less than 7 and are known for their ability to corrode and dissolve certain materials.

What is a base?

A base is a substance that can accept protons (H+ ions) in a chemical reaction, typically characterized by a bitter taste, a slippery feel, and the ability to turn red litmus paper blue. Bases are important in chemistry as they often react with acids to neutralize and form salts.

What is the pH scale?

The pH scale measures the acidity or alkalinity of a solution, ranging from 0 (most acidic) to 14 (most alkaline), with 7 being neutral. It is a logarithmic scale, meaning that each whole number change represents a tenfold difference in acidity or alkalinity. Solutions with a pH less than 7 are considered acidic, while those with a pH greater than 7 are alkaline or basic. pH is an important factor in various chemical and biological processes, as it can affect the behavior and properties of substances.

What is an exothermic reaction?

An exothermic reaction is a chemical reaction that releases energy in the form of heat to the surroundings. This means that the products of the reaction have less energy than the reactants, resulting in a net release of energy. Exothermic reactions typically feel warm to the touch and can be important in various processes such as combustion and many everyday reactions.

What is the difference between a physical change and a chemical change?

A physical change is a change in the form or appearance of a substance without altering its chemical composition, such as melting ice or tearing paper. On the other hand, a chemical change involves a rearrangement of atoms in a substance resulting in the formation of a new substance with different chemical properties, like when wood burns or when food is digested.

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