What does a student learn in StateGeorgia,GradeGrade 8,SubjectScience?

Students learn what matter is made of and how its properties, like mass, density, and state, can be measured and compared. They also look at how evidence from investigations supports claims about how matter behaves.

Students sort matter into two groups: pure substances (like a single element or a chemical compound) and mixtures (like salt water or trail mix). They use models or diagrams to show how the two differ at the particle level.

Particles in a solid, liquid, gas, or plasma move differently depending on heat. Students build and use models to show how adding or removing heat changes the way those particles move and how tightly they stick together.

Students run experiments to sort materials by how they behave physically, like when they melt or sink, and by how they react chemically, like whether they burn or combine with other substances.

Students look at evidence from an experiment or observation and argue whether a substance changed into something new (chemical change) or just changed shape, size, or state (physical change).

The periodic table is a map of every known atom. Students use its patterns to figure out how many protons, neutrons, and electrons an atom has, then build models showing how those particles fit together.

In a chemical reaction, the total amount of matter stays the same before and after. Students explain why the starting materials and the new substances formed look and behave differently, even though no atoms are gained or lost.

Energy doesn't disappear when it seems to run out. Students learn how energy changes form, like motion becoming heat or stored energy becoming movement, and practice arguing with evidence that the total energy in a system stays the same.

Students read measurements of moving or hanging objects and plot them on a graph to show how mass, speed, and height affect the energy an object carries.

Students design and run an experiment to watch energy shift between motion and stored position, like a pendulum swinging or a ball rolling down a ramp, then explain what the results show.

Students pick a real example, like a match or a light bulb, and explain in writing which form of energy goes in and which comes out. The argument shows that energy changes form but does not disappear.

Students set up experiments to watch how heat moves: through a solid when atoms bump into each other, through the air or space as invisible waves, and through liquids or gases as circulating currents.

Students learn what makes objects speed up, slow down, or change direction. They explore how a heavier object needs more force to move the same way a lighter one does.

Students read graphs and data tables to find patterns in how fast objects move, how far they travel, and how quickly they speed up or slow down.

Students explain what happens to a moving object when forces on it are balanced or unbalanced, using Newton's three laws. Think of a book sitting still on a desk versus a kicked soccer ball speeding up or changing direction.

Bigger objects need more force to speed up or slow down. Students use evidence to explain why pushing a loaded shopping cart takes more effort than pushing an empty one.

Light waves and sound waves follow different rules. Students learn why light can travel through empty space while sound cannot, and how each type of wave bends, bounces, and transfers energy in its own way.

Light waves and sound waves both carry energy, but they travel in different ways. Students compare how light can move through empty space while sound cannot, and look for other patterns that set the two types of waves apart.

The electromagnetic spectrum arranges light, radio waves, X-rays, and other waves by energy level. Students use data to explain why waves on one end carry more energy than waves on the other.

Students design a device that uses some part of the electromagnetic spectrum, such as a radio signal, an X-ray, or a heat sensor, to solve a real-world problem in medicine, communication, or another field.

Students compare what happens when light and sound waves hit different materials, including glass, walls, and water, to see which waves bounce, bend, pass through, or get absorbed. Models like diagrams or simulations help show the differences.

Students look at data to figure out how the speed of a wave changes as it moves through different materials, like air, water, or glass. Denser materials change how fast waves travel, and students use patterns in the data to predict what happens next.

Higher frequency and shorter wavelength mean more energy in a wave. Students use graphs or diagrams to show how these wave properties relate to each other.

Lenses bend light to form an image, the way glasses sharpen blurry words or a camera captures a scene. Students model how concave and convex lenses focus or spread light and connect that to tools like telescopes, microscopes, and eyeglasses.

Students study three invisible forces: gravity (what pulls objects down), electricity, and magnetism. They read, compare sources, and explain how each force acts on objects in the natural world.

Students build an argument, using real evidence, that magnets, gravity, and electric charges can push or pull objects without touching them. The force travels across the gap through an invisible field.

Students test which materials let electric charge spread through them and which ones block it, using hands-on experiments to see the difference between conductors like metal and insulators like rubber or plastic.

Students test what makes magnets and electromagnets stronger or weaker by changing one thing at a time, like the number of wire coils, the size of the battery, or how far apart two objects are.