HMH Unit 5 Nature of Matter Assessment

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It is made up of protons, neutrons, and electrons.

Front

Who proposed that all matter is made of tiny, solid balls called atoms?

Back

Democritus proposed that all matter is made of tiny, solid balls called atoms.

Front

What is the effect of temperature on matter?

Back

Temperature affects how quickly a substance changes from one state to another, such as from solid to liquid.

Front

What are the components of water?

Back

Water is made up of 2 hydrogen atoms and 1 oxygen atom.

Front

What is a solution?

Back

A solution is a mixture where one substance (solute) is dissolved in another (solvent), like salt in water.

Front

What happens when salt is added to boiling water?

Back

When salt is added to boiling water, it creates a mixture called a solution.

Front

What is a chemical change?

Back

A chemical change occurs when substances combine or break apart to form new substances, like yeast producing foam in water.

Front

What is a physical change?

Back

A physical change is a change in the form or appearance of a substance without altering its chemical composition.

Front

What is the difference between a mixture and a solution?

Back

A mixture is a combination of two or more substances that retain their individual properties, while a solution is a homogeneous mixture where one substance is dissolved in another.

Front

What is the role of temperature in changing states of matter?

Back

Temperature plays a crucial role in changing states of matter, as it can cause substances to melt, freeze, evaporate, or condense.