7th Grade Science Vocabulary Worksheets
Are you a 7th-grade science student searching for effective tools to enhance your understanding of key concepts? Look no further - our comprehensive collection of science vocabulary worksheets is designed to provide you with a valuable resource to reinforce your learning and expand your knowledge. These worksheets focus on essential vocabulary terms, helping you become proficient in subject-specific terminology and improving your overall comprehension of scientific concepts.
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What is potential energy?
Potential energy is the energy that an object possesses due to its position or condition. It is stored energy that has the potential to do work in the future. The most common forms of potential energy include gravitational potential energy, elastic potential energy, and chemical potential energy.
What is the difference between a physical change and a chemical change?
A physical change involves a change in the physical properties of a substance, such as its shape, size, or state, without changing its chemical composition. On the other hand, a chemical change results in the formation of new substances with different chemical compositions. This usually involves breaking and forming bonds between atoms, leading to a chemical reaction.
What is the purpose of the periodic table?
The purpose of the periodic table is to organize and categorize all known elements based on their chemical properties, atomic structure, and relationships with each other. It provides a systematic way to understand and predict the behavior of elements, as well as facilitate the study and discovery of new elements and compounds.
What is a cell membrane?
A cell membrane is a semipermeable barrier that surrounds the cytoplasm of a cell, separating its internal environment from the external environment. It controls the movement of substances in and out of the cell, allowing for the regulation of exchanges with the surrounding environment and maintaining cellular structure and function.
How does photosynthesis work?
Photosynthesis is a process where plants, algae, and certain bacteria convert sunlight, carbon dioxide, and water into glucose (sugar) and oxygen. Through this process, plants absorb sunlight using chlorophyll in their leaves, which initiates a series of chemical reactions in the chloroplasts. Water is absorbed through the plant's roots and carbon dioxide is taken in from the air. The energy from sunlight is used to convert water and carbon dioxide into glucose and oxygen. The glucose provides energy for the plant to grow and the oxygen is released into the atmosphere as a byproduct.
What is the difference between an herbivore and a carnivore?
An herbivore is an organism that primarily consumes plants and vegetation, while a carnivore is an organism that primarily consumes meat or other animal products. Herbivores have specialized teeth for grinding and breaking down plant material, while carnivores typically have sharp teeth for tearing flesh. Additionally, herbivores often have longer digestive tracts to process plant matter efficiently, whereas carnivores have shorter digestive tracts suited for quickly digesting meat.
What are the three states of matter?
The three states of matter are solid, liquid, and gas.
What is the function of the respiratory system?
The function of the respiratory system is to facilitate the exchange of oxygen and carbon dioxide between the body and the environment. This process occurs through breathing, where air is inhaled into the lungs, oxygen is absorbed into the bloodstream, and carbon dioxide is eliminated from the body through exhalation. This vital function ensures the delivery of oxygen to all cells in the body for energy production and the removal of waste carbon dioxide.
How are sound waves different from light waves?
Sound waves are mechanical waves that require a medium, such as air or water, to propagate. They travel by causing particles in the medium to vibrate in a wave-like pattern. On the other hand, light waves are electromagnetic waves that can travel through a vacuum and do not require a medium. They consist of oscillating electric and magnetic fields that can travel through empty space at the speed of light. Sound waves are typically longitudinal waves, while light waves are transverse waves. Additionally, sound waves have much lower frequencies and wavelengths compared to light waves.
What is the role of the nucleus in a cell?
The nucleus in a cell serves as the control center, containing the cell's DNA which stores genetic information. It regulates the cell's activities by controlling gene expression, cell division, and protein synthesis. The nucleus also protects the DNA and helps maintain the integrity of the genetic material.
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