Physical Science

How can we measure very long distances-to the stars? How do we measure very small distances-the microscopic? This apparatus utilizes the concept of optical levers and parallax to demonstrate the methods used for both long and short distance measureme...

Add some color and fun to your lessons on specific gravity with a colorful and dramatic Galileo thermometer. Galileo Galilei (1564-1642) succeeded in developing a thermometer based upon the law of physics which states that the specific gravity of liq...

Add some color and fun to your lessons on specific gravity with a colorful and dramatic Galileo thermometer. Galileo Galilei (1564-1642) succeeded in developing a thermometer based upon the law of physics which states that the specific gravity of liq...

Convince your students that air has weight with this fun demonstration apparatus. Simply weigh the can with air trapped inside. Then connect the demonstration apparatus to a vacuum pump and pump the air out of the can. The convenient built-in valve m...

Eureka! Quickly and accurately measure an object's mass and volume-with one apparatus! How is this possible? This unique balance utilizes Archimedes' principle of fluid displacement and buoyancy force-the same principle used to explain why a 500-ton ...

Eureka! Quickly and accurately measure an object's mass and volume-with one apparatus! How is this possible? This unique balance utilizes Archimedes' principle of fluid displacement and buoyancy force-the same principle used to explain why a 500-ton ...

Archimedes ran through the streets of ancient Greece shouting “Eureka!” when he realized how he could utilize his density and water displacement experiments to demonstrate that the king's crown was made of pure gold. Students can discover Archimedes'...

In a chemical reaction, matter is neither created nor destroyed-except in this discrepant event demonstration! Let students discover what is really measured when something is “weighed” on a balance. First carry out a gas producing reaction in a cappe...

In a chemical reaction, matter is neither created nor destroyed, except in this apparent contradictory experiment! Students will understand what is really measured when we “weigh” something on a balance. Students first conduct an experiment to note t...

Challenge students to determine the composition of 15 colorful, different-sized rods, each one a different material. Students exercise their measurement skills with mass, length, and volume determinations as they problem solve to identify each materi...

Students will be mesmerized by watching the layers in these bottles move and separate as they are turned upside-down, swirled, and shaken. Begin your discussion on density by displaying one bottle in front of the class. Later in the week, switch the ...

Students watch with amazement as warm water rises and cold water sinks in this clever demonstration of density. The demonstration apparatus is a clear acrylic chamber that is divided down the middle with a removable wall. Hot, red water is placed on ...

Here's a handy, low-cost set of 10 one-inch cubes cut from modern materials. Use these precision cubes to perform a variety of density experiments. The set contains one cube each of aluminum, steel, brass, copper, acrylic, oak, nylon, pine, poplar, ...

Reduce your density lab costs with this economical set of four metal cubes. Students measure the densities of the four metal blocks and then determine their composition. This simple kit is effective at teaching density and is a great value! One-inch ...

Simple device with a multitude of demonstration possibilities. The rod responds to changes in density of a liquid by sinking or rising in the liquid. As the density of the liquid is changed, the rod moves up or down accordingly. It sinks in warm wate...

The “normal” density rod (AP4632) sinks in warm water and floats in cold water. The reverse density rod works just the opposite! It will float in water 30-35 ºC and sink in cool water! Using both rods will enhance your ability to make den...

A gallon of milk seems to weigh more than the fluffy pillow you sleep on. You probably wouldn't confuse these two materials nor have trouble thinking about their density. But how about steel versus iron? Aluminum versus tin? Density is a very measura...

A gallon of milk seems to weigh more than the fluffy pillow you sleep on. You probably wouldn't confuse these two materials nor have trouble thinking about their density. But how about steel versus iron? Aluminum versus tin? Density is a very measura...

Mass, volume, and density are concepts you teach over and over again during the school year in many different ways. Help students understand the relationships between mass, volume and density with our Equal Mass Kit. Five cylindrical objects, made of...

Mass, volume, and density are concepts you teach over and over again during the school year in many different ways. Help students understand the relationships between mass, volume and density with our Equal Mass Kit. Five cylindrical objects, made of...

Use this series of hands-on activity kits to teach students the principles and fundamentals of laboratory measurement. Students learn important measurement concepts relating to the metric system, accuracy and precision, and how to convert units of me...

Crime scenes often contain broken glass from windows, cars, vases, and numerous other glass items. Matching glass pieces with other glass pieces can reveal patterns that can help explain a criminal sequence.   This activity utilizes safe chemi...

Give your students a challenge-the measurement challenge! With this innovative teacher-designed kit, students learn to make accurate measurements, estimate to the proper level of certainty, and apply rules for significant figures in calculations. Han...

The large sizes of our overflow cans make them especially useful for student experiments with density cylinders and Archimedes' Principle devices. The specially angled spout assures complete collection of displaced water thus providing greater accura...

The large sizes of our overflow cans make them especially useful for student experiments with density cylinders and Archimedes' Principle devices. The specially angled spout assures complete collection of displaced water thus providing greater accura...

Seamless aluminum catch bucket to accompany our overflow cans. The flared lip makes total displacement water collection easier and the convenient handle makes pouring more controlled. Overall dimensions are 7.5 cm in diameter, 7.0 cm high, with a cap...

Precision machined metal blocks with heavy-duty hook on one face. Ideal for measurement and density exercises. Each block measures 3.1 cm on a side and the set consists of one each of aluminum, brass, steel, and lead. Also available individually.

Precision machined metal blocks with heavy-duty hook on one face. Ideal for measurement and density exercises. Each block measures 3.1 cm on a side and the set consists of one each of aluminum, brass, steel, and lead. Also available individually.

Precision machined metal blocks with heavy-duty hook on one face. Ideal for measurement and density exercises. Each block measures 3.1 cm on a side and the set consists of one each of aluminum, brass, steel, and lead. Also available individually.

Precision machined metal blocks with heavy-duty hook on one face. Ideal for measurement and density exercises. Each block measures 3.1 cm on a side and the set consists of one each of aluminum, brass, steel, and lead. Also available individually.

Precision machined metal blocks with heavy-duty hook on one face. Ideal for measurement and density exercises. Each block measures 3.1 cm on a side and the set consists of one each of aluminum, brass, steel, and lead. Also available individually.

Four different metal cylinders for use in measurement and density experiments. Their small size (5 cm long x 1.3 cm diameter) make them perfect for use in a graduated cylinder. Includes copper, brass, aluminum, and steel.