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Seventh grade Science Practice
Seventh-grade science investigates life science, Earth science, and physical science through inquiry, data analysis, and evidence-based reasoning, covering genetics, evolution, chemical reactions, Earth's history, ecosystems, cells, forces, and energy.
97 skills · 776 questions · No signup required to try
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Adaptive difficulty
Questions get harder as your child improves and ease back when they struggle.
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Mastery tracking
See real progress across every seventh grade Science skill.
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Motivating
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Seventh grade Science topics covered
Genetics and heredity
- Develop and use a model to describe why structural changes to genes (mutations) may result in harmful, beneficial, or neutral effects
- Develop and use a model to describe why asexual reproduction results in offspring with identical genetic information
- Develop and use a model to describe why sexual reproduction results in offspring with genetic variation
- Construct an explanation based on evidence that describes how genetic variations of traits in a population increase some individuals' probability of surviving and reproducing
Natural selection and evolution
- Analyze and interpret data for patterns in the fossil record that document the existence of organisms and major biological events
- Apply concepts of statistics and probability to support explanations that organisms with an advantageous heritable trait tend to increase in proportion
- Construct an explanation based on evidence for how natural selection leads to adaptation of populations
- Use argument based on empirical evidence and scientific reasoning to support an explanation for how characteristic animal behaviors affect the probability of successful reproduction
Chemical reactions
- Construct and revise an explanation for the outcome of a simple chemical reaction
- Analyze and interpret data on the properties of substances before and after substances interact
- Gather and make sense of information to describe that synthetic materials come from natural resources
- Develop and use a model to describe how the total number of atoms does not change in a chemical reaction
Earth's history
- Construct a scientific explanation based on evidence from rock strata for how the geologic time scale is used
- Construct an explanation using multiple lines of evidence for how biodiversity and environments changed as Earth evolved
- Analyze and interpret data on the distribution of fossils and rocks to provide evidence of the moving tectonic plates
- Explain the principle of superposition and how it is used to determine the relative age of rock layers
Cells and cell processes
- Compare and contrast the structure and function of prokaryotic and eukaryotic cells
- Identify and describe the functions of major cell organelles including the nucleus, mitochondria, chloroplasts, and cell membrane
- Develop and use a model to explain how the cell membrane controls the movement of substances into and out of the cell
- Explain how cells obtain energy through cellular respiration and describe the reactants and products of the process
Body systems and homeostasis
- Construct an explanation for how the skeletal, muscular, and nervous systems work together to produce movement
- Describe how the circulatory and respiratory systems work together to exchange oxygen and carbon dioxide in the body
- Explain how the digestive system breaks down food and absorbs nutrients to provide energy to cells
- Analyze and interpret data to explain how the body maintains homeostasis through feedback mechanisms
Ecosystems and energy flow
- Analyze and interpret data to provide evidence for the effects of resource availability on organisms and populations in an ecosystem
- Construct an explanation that predicts patterns of interactions among organisms across multiple ecosystems using food webs and food chains
- Develop a model to describe the cycling of matter and the flow of energy among living and nonliving parts of an ecosystem
- Evaluate competing design solutions for maintaining biodiversity and ecosystem services using evidence and scientific reasoning
Human impact on ecosystems
- Analyze and interpret data to explain how human activities affect biodiversity and the health of ecosystems
- Construct an argument supported by evidence that the introduction of invasive species disrupts native ecosystems
- Evaluate the impacts of deforestation, habitat destruction, and pollution on species populations and ecosystem services
- Design a solution to reduce human impact on the environment and evaluate its trade-offs using scientific evidence
Plate tectonics and Earth's structure
- Develop and use a model of Earth's interior layers to describe the properties of the crust, mantle, and core
- Construct an explanation using evidence from seafloor spreading to support the theory of plate tectonics
- Analyze and interpret data on the locations of earthquakes and volcanoes to identify patterns related to plate boundaries
- Describe the three types of plate boundaries—convergent, divergent, and transform—and the landforms associated with each
Weather, climate, and atmosphere
- Develop and use a model to describe how Earth's atmosphere is layered and explain the role of each layer
- Explain how uneven heating of Earth's surface by the sun drives weather patterns and global wind systems
- Analyze and interpret weather maps and data including temperature, pressure, and precipitation to predict weather patterns
- Describe the water cycle and explain how it redistributes water and energy around Earth
Forces, motion, and Newton's laws
- Apply Newton's first law of motion to explain why objects at rest stay at rest and objects in motion stay in motion unless acted upon by a net force
- Use Newton's second law to calculate force, mass, and acceleration in simple scenarios
- Apply Newton's third law to describe pairs of equal and opposite forces in real-world interactions
- Construct and interpret speed-time and distance-time graphs to describe the motion of objects
Energy forms, transfer, and transformation
- Construct and interpret graphical displays of data to describe the relationships of kinetic and potential energy
- Develop a model to describe that when the arrangement of objects interacting at a distance changes, different amounts of potential energy are stored
- Apply the law of conservation of energy to explain how energy is transferred and transformed in physical systems
- Analyze and interpret data to determine the factors that affect the amount of kinetic energy an object possesses
Frequently asked questions
Is Seventh grade Science practice free?+
Yes — try several questions per grade free, no signup needed. A free account unlocks unlimited adaptive practice and saved progress.
How does ZeLarn adapt to my child's level?+
After each answer, ZeLarn adjusts the difficulty — promoting to harder questions after a correct streak and easing back when your child struggles — so practice always stays at the right challenge.
Is ZeLarn a good IXL alternative for seventh grade Science?+
ZeLarn offers adaptive practice, mastery tracking, and gamification (streaks, badges, games) as a free, engaging alternative for seventh grade students.