8th grade Compound and Mixtures intro to light | Baamboozle - Baamboozle

Which of these is an example of a homogeneous mixture?

Salt dissolved in water

Salad

Oil and water

What property of elements is used to identify them with an XRF spectrometer?

Atomic structure and energy levels

Color

Texture

Which part of a chemical equation shows the new substances formed?

Products

Reactants

Elements

Which of these is an example of a physical change?

Dissolving salt in water

Burning paper

Cooking an egg

What type of change occurs when iron rusts?

Chemical change

Physical change

Dissolution

What is a solute?

The substance being dissolved

The liquid that dissolves a solid

The leftover mixture

A particle diagram of a compound shows:

Different atoms chemically bonded

Identical atoms not touching

Random symbols

Which of the following is not a pure substance?

Saltwater

Water

Iron

What kind of change occurs when water evaporates?

Physical change

Nuclear reaction

Chemical reaction

In the reaction: Magnesium + Oxygen → Magnesium oxide, what is the product?

Magnesium oxide

Magnesium

Carbon dioxide

Which method separates substances by boiling points?

Distillation

Filtration

Magnetic separation

What does IR in IR spectrometer stand for?

Infrared

Intense Radiation

Ionic Reflection

What’s the main difference between an element and a compound?

Elements contain one atom type, compounds contain two or more

Compounds are natural

elements are not

Compounds have no mass

A student mixes iron and sulfur and notices they can be separated with a magnet. What does this tell us?

It’s still a mixture

They formed a compound

Iron turned into sulfur

What happens during a chemical reaction?

A new substance is formed

Atoms disappear

The mixture turns into a gas

A mixture of sand and water can be separated using:

Filtration

Chromatography

Distillation

Which statement is true about mixtures?

The components retain their original properties

They are always made of compounds

They can’t be separated

Which one of these is not a method used to separate mixtures?

Burning

Filtration

Evaporation

Which tool is best for identifying the elements in a rock?

XRF spectrometer

Thermometer

Microscope

What is a compound?

A pure substance formed from two or more elements chemically bonded

A physical blend of substances

A single type of atom

Simple distillation separates substances based on differences in boiling points.

True

False

Solute particles in a solution are too small to block light, making the solution transparent.

True

False

Evaporation and crystallization are methods to separate salt from salt water.

True

False

Iron filings can be separated from sulfur using a magnet.

True

False

A solution is a type of mixture, not a compound.

True

False

A compound has different properties than the elements that form it.

True

False

IR spectrometers detect how compounds absorb infrared light to identify them.

True

False

In a mixture of iron and sulfur, the substances are not chemically bonded.

True

False

XRF spectrometers detect elements, not compound vibrations (that’s IR spectrometers).

True

False

An element is a pure substance made up of atoms of the same kind.

True

False

When magnesium burns in oxygen, it demonstrates:

A chemical reaction

A physical change

A cooling process

What makes each element unique?

Its atomic structure

Its color

Its temperature

A particle diagram would typically show:

How atoms rearrange during reactions

The weight of elements

The temperature of a reaction

X-ray fluorescence helps scientists:

Identify elements in materials

Measure radiation

Detect hidden objects

The process of elements combining chemically is called:

Compound formation

Mixing

Evaporation

An element cannot be:

Broken down by ordinary means

Seen under a microscope

Heated

When iron and sulfur combine, they form:

Iron sulfide

A mixture

A gas

Scientists use IR spectrometers to:

Detect chemical "signatures"

Measure sound waves

Weigh substances

What makes a compound different from its original elements?

It has new, unique properties

It cannot be separated

It weighs less

The term "reactants" in a chemical equation refers to:

The starting materials

The final products

The laboratory equipment

Which of the following is a SOLID element at room temperature?

Iron

Oxygen

Hydrogen

A chemical reaction involves:

Rearrangement of atoms

Complete destruction of matter

No change in atomic structure

When scientists use an XRF spectrometer on a rock, they are primarily trying to:

Identify which elements are present

Measure its weight

Determine its color

Which statement about elements is TRUE?

Elements are the simplest form of matter

Elements can be easily broken down

Elements always exist as liquids

An IR spectrometer helps scientists by:

Analyzing chemical bond vibrations

Measuring temperature

Predicting weather patterns

In the word equation "Iron + Sulfur → Iron sulfide", what are the reactants?

Iron and sulfur

Iron sulfide

Oxygen

A compound differs from an element because:

It is formed by chemically combining different elements

It cannot be seen

It exists only in laboratories

What happens when magnesium burns in oxygen?

It creates a new compound with different properties

Nothing changes

The oxygen is destroyed

An XRF spectrometer is primarily used to:

Identify elements in rocks and soil

Measure temperature

Detect radioactivity

Which of the following best describes an element?

A pure substance made of atoms of the same kind

A substance that can be broken down easily

A compound with multiple properties