Science Worksheets and Study Guides Sixth Grade

Earth Science: Astronomy

Studying and exploring space

Edwin Powell Hubble (1889-1953) was an American astronomer who, in 1923, showed that the universe is expanding. He used photographs to prove that there are galaxies beyond our own. Prior to this, scientists believed that our galaxy was the entire universe. In 1990, the Hubble Space Telescope (clearly named in honor of the great 20th century astronomer) was launched by NASA and has provided some of the most spectacular images of the universe ever seen. Read more...iWorksheets: 3Study Guides: 1Vocabulary: 4

Earth Science: Earth's Changing Surface

Earth's energy resources

Renewable resources are resources that can be replenished in a reasonable amount of time. Nonrenewable resources are resources that, once consumed, cannot be replaced. Because oil, natural gas, and coal are the products of plants and organisms, they are known as fossil fuels. Fossil fuels are ultimately a limited resource, it is important to develop and use renewable energy resources. Read more...iWorksheets: 3Study Guides: 1Vocabulary: 1

Earth Science: Earth's Waters

Earth's Fresh Water

Fresh water moves over the surface by an interconnected system of streams and rivers. Small streams that feed water into larger rivers are called tributaries. Rivers are closely interconnected and flow from higher to lower elevations where the water collects in larger and larger rivers until it ultimately flows into the oceans. Read more...iWorksheets: 3Study Guides: 1Vocabulary: 2

Earth Science: Exploring Planet Earth

Groundwater Resources

Groundwater is fresh water stored in regolith and bedrock. Even though solid rock like granite or marble has no pores, it often has a series of cracks and possibly faults. Water accumulates in the cracks in solid bedrock and, at times, is a source of water. A layer of rock material that can store water and allow the movement of water through the ground is called an aquifer. Read more...iWorksheets: 3Study Guides: 1Vocabulary: 2

Introduction to earth science

The field of Geology includes a number of specialized disciplines including: Mineralogy - the study of minerals, Paleontology - the study of fossils, Petrology - the study of rocks, Geophysics - the study of the physics of the Earth and its atmosphere, Meteorology - the study of weather and weather prediction, Seismology - the study of earthquakes, and Volcanology - the study of volcanoes. Read more...iWorksheets: 4Study Guides: 1Vocabulary: 2

Maps as models of the earth/Contour models

Geologists use a variety of different types of maps to model or depict the three-dimensional Earth on a two-dimensional surface. Each type of map serves a purpose because each type has its special strengths: Topographic Maps, Mercator Projections, Conic Projections, Azimuthal Projections. Read more...iWorksheets: 3Study Guides: 1Vocabulary: 5

Plate Tectonics

The Earth's layers: crust, mantle, core. Plate tectonics is a scientific theory that describes the large-scale motion of plates of the Earth's crust over hot mantle rock. Plate tectonics are active on Earth since the very beginning. Read more...iWorksheets: 3Vocabulary: 4


There are three major groupings of rocks: igneous, metamorphic, and sedimentary. Igneous rocks form when liquid rock cools and hardens. Sedimentary rocks: Clastic, Chemical, Biochemical or organic. Metamorphic rocks: foliated and non-foliated (or massive). Read more...iWorksheets: 5Study Guides: 1Vocabulary: 3

Earth Science: Weather & Climate

Earth's Atmosphere

FreeThe Earth is unique in our solar system because it has an atmosphere that can support life. By comparison, Venus has an atmosphere that is high in ammonia and other caustic gases; it is so dense that it would crush a human. On the other hand, Mars has no atmosphere at all. Read more...iWorksheets: 5Study Guides: 1Vocabulary: 7

Weather patterns

Air masses are extensive bodies of air that have similar temperatures and water content throughout. The boundary or line delineating different air masses is the weather front. A small weather system that has intense energy that creates heavy rains, high winds, and lightning is called a thunderstorm. A hurricane is an extremely large, tropical, rotating weather system that has sustained winds of at least 119 km/hr. Read more...iWorksheets: 3Study Guides: 1Vocabulary: 4

Human Body

Moving and Controlling the Body

Tissues are collections of cells of different types that interact to support the function of the tissues, organs and overall organ system. The brain and spinal cord communicate with all other parts of the body through the nerves that make up the peripheral nervous system. Sensory neurons carry impulses toward the brains and spinal cord. Motor neurons carry impulses away from the brain and interneurons carry impulses within the brain and spinal cord. Read more...iWorksheets: 3Vocabulary: 3

Protection, Reproduction and Cooperation

The human body protects itself with non-specific defense systems that react naturally and automatically to invading organisms. Your skin, with its layers of protective tissue, is a very strong, watertight barrier to environmental pathogens. What is an Antigen? A antigen is a molecule that immune system can recognize as either part of the body or as foreign to the body. Read more...iWorksheets: 3Vocabulary: 3

Providing Fuel and Transportation

Food is stored and processed in your stomach, so that your body can gain access to the nutrients in the food. Your body relies on what you eat and drink to maintain healthy tissues and to generate the energy. There are six categories of nutrients: carbohydrates, fats, proteins, vitamins, minerals and water. Read more...iWorksheets: 4Vocabulary: 3

Life Science: Animals

Birds and Mammals

A bird is an endothermic vertebrate that lays eggs, has feathers, and has a four- chambered heart. A mammal is an endothermic vertebrate that has skin covered with fur or hair, a four-chambered heart, a wide arrangement of teeth, and young that are born alive and feed by milk that was produced by the mother’s body. Read more...iWorksheets: 5Study Guides: 1Vocabulary: 5

Fishes, Amphibians, and Reptiles

Fish reproduce using external fertilization. External fertilization is when the female’s eggs are meeting with the male’s sperm outside of the female’s body. Three major groups are the jawless fish, cartilaginous fish, and bony fish. An amphibian is a vertebrate that is ectothermic. Most amphibians live the beginning of their lives in the water. A reptile is a vertebrate that is ectothermic and has scaly skin and a pair of lungs. Lizards, snakes, turtles, tortoises, and crocodiles are all examples of reptiles. Read more...iWorksheets: 5Study Guides: 1Vocabulary: 5

Introduction to Animals

Scientists have discovered about 1.2 million different species of animals on our planet. Planet Earth is home to 8.7 million species, scientists estimate. Animals have adapted to feed on different types of food. There are animals that eat only animals (carnivores), animals that eat only plants (herbivores), and animals that eat both plants and animals (omnivores). Read more...iWorksheets: 4Study Guides: 1Vocabulary: 4

Mollusks, Arthropods and Echinoderms

FreeA molusk is an invertibrate that has an un-segmented, soft body that is almost always protected by outer shells. Snails, octopuses, clams, and oysters are all species of mollusks. Arthropods are invertebrates with external skeletons, segmented bodies, and appendages. Appendages are structures that are jointed and attached to the body. Read more...iWorksheets: 5Study Guides: 1Vocabulary: 7

Sponges, Cnidarians and Worms

Until recently, people thought that sponges were plants. The fact that they take in food puts them into the animal kingdom. When they are adults, they do not move. They attach themselves to a hard surface where they live out their lives. The structure of a sponge is very basic with some specialized tissue, but lacking organs and organ systems. Read more...iWorksheets: 5Study Guides: 1Vocabulary: 4

Life Science: CELLS: Structure and Processes

Cell Transport

Active and Passive Cell transport. There are three main types of passive transport - Diffusion, Osmosis and Facilitated Diffusion. There are two types of active transport - Primary (direct) and Secondary (indirect). Read more...iWorksheets: 2Vocabulary: 2

Cells: The Basic Units of Life

The cell is the basic building blocks of all living organisms. There are many structures within the cell. The structures within the cell are known as organelles, which are all of the structures within the cell that carry out specific functions. Read more...iWorksheets: 4Study Guides: 1Vocabulary: 5

Life Science: Diversity of Life

Diversity of life

There are many characteristics that scientists use to determine if something is alive. The characteristics are very specific and are applicable to all of the different species that exist on our planet. Read more...iWorksheets: 4Study Guides: 1Vocabulary: 4

Six Kingdoms of Life

The six Kingdoms are: Archaebacteria, Eubacteria, Fungi, Protists, Plants and Animals. Fungi include mushrooms, molds, and yeasts. Protists include some algae, paramecium, and amoeba. Eubacteria are single-celled organisms that don’t have a nucleus. Animals are divided into vertebrates and invertebrates and include mammals, amphibians, reptiles, birds and fish. Read more...iWorksheets: 3Vocabulary: 3

Life Science: Ftom Bacteria to Plants

Plant Processes

Photosynthesis is a process powered by sunlight that uses carbon dioxide and water to produce oxygen and food. The process requires six molecules of water and six molecules of carbon dioxide. These molecules undergo chemical changes and oxygen and sugars like glucose are produced. The oxygen is let go through the stomata and the sugars are used to power cell functions. Read more...iWorksheets: 5Study Guides: 1Vocabulary: 2

Plant reproduction

An angiosperm is a plant that produces seeds within a fruit. Reproduction begins when the pollen from the anther is in contact with the stigma. Eventually the egg will be fertilized in the ovule that is in the ovary and turn from a zygote to an embryo inside the seed. The life cycle of angiosperms among the different species is very similar: Pollination, fertilization, and the development of fruit. Read more...iWorksheets: 4Study Guides: 1Vocabulary: 1

Life Science: Genetics & Heredity

Genetics - Study of Heredity

Heredity is the passing on of traits from parents to their offspring, either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents. Read more...iWorksheets: 4Study Guides: 1Vocabulary: 9

Physical Science: Electricity & Magnetism


Charged Particles. Electric charges are either positive (+) or negative (-). The protons in an atom have a positive charge and the electrons around the atom have a negative charge. If two particles have similar charges, they repel each other, but, if they have opposite charges, they attract each other. This explains why an atom holds together. Read more...iWorksheets: 5Study Guides: 1Vocabulary: 2


The production of a magnetic field around an electrical current is called electromagnetism. The placement of an electric current in a preexisting magnetic field can cause motion. When this happens, electrical energy is transformed into mechanical energy. The use of electrical energy to produce mechanical energy is the principle behind the workings of an electric motor. Read more...iWorksheets: 4Study Guides: 1Vocabulary: 2


A magnet is any substance that attracts the element iron or anything with iron in it. All magnets have opposite ends or poles. These are referred to as the north and south poles. In addition, because of polarity, all magnets will point toward the magnetic north pole of the earth. While the greatest magnetic force is at the poles, there is some degree of magnetism all around a magnet. This is called the magnetic field. Read more...iWorksheets: 5Study Guides: 1Vocabulary: 1

Physical Science: Structure & Properties Of Matter

Introduction to matter

Matter is anything that takes up space and has mass. Some of its properties are physical and would include such things as color, volume and weight. Other properties are chemical and deal with how matter chemically reacts with other materials. Matter can undergo both physical and chemical changes. Read more...iWorksheets: 3Study Guides: 1Vocabulary: 2

Solids, liquids and gases

Matter exists in three different states or phases: solid, liquids and gases or vapors. A solid has a definite shape and volume, A liquid has a definite volume but no definite shape and A gas has neither a definite volume nor shape. Gases or vapors are influenced by three factors: temperature, volume and pressure. Read more...iWorksheets: 4Study Guides: 1Vocabulary: 2

Physical Science: Work and Simple Machines

Our impact on earth

Any waste substance that is added to a natural system in amounts greater than that natural system can break it down or eliminate it is called pollution. The waste substance itself is the pollutant. A natural resource that can be replenished is called a renewable resource. In most cases, water is a renewable resource. Read more...iWorksheets: 3Study Guides: 1Vocabulary: 1

Work, Power & Simple Machines

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