Science Test 1

What is matter?

Matter is what makes up the world around us, using atoms and particles.

What are the three types of matter?

Solid, Liquid, and Gas.

Distinguish between physical and chemical properties.

Physical properties are appearance related (shape, size, color, weight); chemical properties include reactivity with substances like oxygen or acids.

Define atom.

An atom is a collection of protons, neutrons, and electrons, with protons in the nucleus and electrons/neutrons moving around it.

What is the difference between protons, neutrons, and electrons?

Protons are positively charged and in the nucleus; neutrons are neutrally charged and also in the nucleus; electrons are negatively charged and orbit the nucleus.

What is relative mass?

Relative mass is a dimensionless quantity that measures the average mass of atoms of a given element.

What do hazard symbols display?

Hazard symbols display the risks associated with a certain substance.

What does reactivity refer to?

Reactivity refers to how a substance reacts to certain conditions or materials.

What is the difference between a theory and a law in science?

A theory explains why phenomena occur with scientific evidence, while a law explains how phenomena occur usually with mathematical expressions.

What does conductivity refer to?

Conductivity refers to how a material reacts to electricity.