Real-World Applications
Chemical Reactions
Forces and Motion
Kinetic and Potential Energy
Atoms and Elements
100

The reason seat belts are important, according to Newton’s First Law.

What is inertia?

100

This is the type of change in which new substances are formed.

What is a chemical change?

100

This law states that an object at rest stays at rest unless acted on by an outside force.

What is Newton’s First Law?

100

Energy in motion is called this.

What is kinetic energy?

100

This subatomic particle has a positive charge and is found in the nucleus.

What is a proton?

200

The force that slows down a moving bicycle on a road.

What is friction?

200

In a balanced chemical equation, the number of atoms of each element must be the same on both sides due to this law.

What is the Law of Conservation of Mass?

200

The unit used to measure force in the metric system.

What is a Newton?

200

A stretched rubber band has this type of stored energy.

What is potential energy?

200

The atomic number of an element is determined by the number of these particles.

What are protons?

300

A car’s airbag protects passengers by increasing this quantity to reduce force.

What is time (of impact)?

300

This type of reaction absorbs energy, often making the surroundings feel colder.

What is an endothermic reaction?

300

The tendency of an object to resist changes in motion is called this.

What is inertia?

300

Doubling this factor in an object has a greater effect on kinetic energy than doubling mass.

What is velocity?

300

This is the most abundant element in the universe.

What is hydrogen?

400

When cooking pasta, this type of reaction occurs when the noodles absorb water and change texture.

What is a physical change?

400

This is the term for substances that speed up chemical reactions without being used up.

What are catalysts?

400

This law states that acceleration depends on mass and force applied.

What is Newton’s Second Law?

400

The Law of Conservation of Energy states that energy cannot be created or destroyed, only this.

What is transferred or transformed?

400

Atoms of the same element with different numbers of neutrons are called this.

What are isotopes?

500

When you push off the ground to jump, the force your legs apply is an example of this law.

What is Newton’s Third Law?

500

The process in which a substance rapidly combines with oxygen and releases energy is called this.

What is combustion?

500

When an object is in free fall, the only force acting on it is this.

What is gravity?

500

The energy transformation in a roller coaster when it moves from the highest hill to the lowest point.

What is potential energy to kinetic energy?

500

The arrangement of elements in the periodic table is based on this scientist’s work.

Who is Dmitri Mendeleev?

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