Grade 7 Science: Word Equations Worksheet
Explore chemical reactions through word equations, identifying reactants and products, and understanding the law of conservation of mass.
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Grade 7 Science: Word Equations
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Read each question carefully and provide your answers in the space provided. This worksheet will test your understanding of word equations, reactants, and products in chemical reactions.
Word equations are a way to represent chemical reactions using the names of the substances involved. The substances that react are called reactants, and the new substances formed are called products. An arrow (→) separates the reactants from the products, and it means 'yields' or 'produces'.
1. In a word equation, the starting materials are called .
2. The new substances formed during a chemical reaction are called .
3. The arrow (→) in a word equation means or .
4. When wood burns, wood and oxygen are the , and ash and carbon dioxide are the .
1. Which of the following best describes a chemical reaction?
A change in state of matter
The formation of new substances
A change in temperature
Dissolving a solid in a liquid
1. Write a word equation for the reaction where hydrogen gas reacts with oxygen gas to produce water.
2. When baking soda (sodium bicarbonate) reacts with vinegar (acetic acid), it produces carbon dioxide gas, water, and sodium acetate. Write the word equation for this reaction.
1. In a word equation, the products are written on the left side of the arrow.
True
False
Consider the following word equation: Iron + Oxygen → Iron Oxide
1. Identify the reactants in this equation.
2. Identify the product in this equation.