SCIENTIFIC NOTATION
Write 4,500 in scientific notation.
4.5x103
A metal spoon is shiny and silver in color. Is this a physical or chemical property?
Physical property
In which state of matter are particles tightly packed together and only vibrate in fixed positions?
Solid
An ice cube is left outside on a hot day and slowly turns into liquid water. What phase change is occurring?
Melting
Which country is home to the ancient pyramids of Giza?
Egypt
Convert 6.32 × 10⁻³ to standard decimal notation.
0.00632
Sugar dissolves in water. Is solubility a physical or chemical property?
Physical property
Which state of matter has a definite volume but takes the shape of its container?
Liquid
Water is placed in a freezer and eventually becomes solid ice. What phase change is occurring?
Freezing
Which element is the only metal that is liquid at room temperature?
Mercury (Hg)
Write 0.0000785 in scientific notation.
7.85 × 10⁻⁵
Iron reacts with oxygen and moisture, causing it to rust. Is this a physical or chemical property?
Chemical property
In which state of matter are particles far apart, moving freely and rapidly, with no definite shape or volume?
Gas
After taking a hot shower, water droplets form on the cold bathroom mirror. What phase change is occurring?
Condensation
Which element has the chemical symbol W?
Tungsten
Write 0.00000009246 in scientific notation.
9.246 × 10⁻⁸
A white powder looks identical to sugar, but when mixed with vinegar, it produces bubbles of carbon dioxide gas. Is the powder's ability to react with vinegar a physical or chemical property?
Chemical property
In this state of matter, particles have extremely high energy, and electrons separate from atoms, creating charged particles called ions. It has no definite shape or volume. What state of matter is this?
Plasma
A piece of dry ice is left on a table. It gradually disappears, changing directly from a solid into a gas without becoming a liquid. What phase change is occurring?
Sublimation
Which element is the most abundant in the Earth's crust?
Oxygen (O)
Convert 3.0785 × 10¹¹ to standard decimal notation.
307,850,000,000
A metal reacts with hydrochloric acid and releases hydrogen gas. Is this reactivity a physical or chemical property?
Chemical property
A substance has no definite shape but maintains a definite volume. Its particles are close together, randomly arranged, and constantly moving past one another. When transferred to a larger container, its volume remains unchanged. What state of matter is it?
Liquid
On a very cold morning, a thin layer of frost forms on a car windshield even though it has not rained. Water vapor in the air changes directly into solid ice. What phase change is occurring?
Deposition
What is the only country in the world whose national flag is not rectangular?
Nepal