Science Study Notes

What is an element?

A substance that cannot be broken down into simpler substances by chemical means.

What is a compound?

A substance made up of two or more different chemical elements combined into a fixed ratio.

What is a mixture?

A substance made by mixing two or more other substances.

What is a physical change?

A change in which no new substance is formed; can involve changes in shape, state, or mixing.

What is a chemical change?

A change that produces one or more new substances, indicated by signs like color change or gas production.

What is kinetic energy?

The energy of movement; any moving object possesses kinetic energy.

What is potential energy?

Stored energy based on position, such as gravitational, chemical, and elastic potential energy.

What is current electricity?

The flow of electric charges (electrons) through a wire or conductor.

What are the parts of a simple circuit?

An energy source (like a battery), energy user (like a light bulb), and wires connecting them.

What are the first three elements on the periodic table?

Hydrogen (H), Helium (He), and Lithium (Li).

What are the properties of an element?

The properties of an element can include its atomic number, mass, state of matter (solid, liquid, gas), reactivity, color, and the types of bonds it can form.