DAY 1 CLASS 7 Acids, Bases, and Salts - Day 1

Multiple Choice

Which of these is a pure substance?

• Soil

• Lemonade

• Gold

• Air

Open Ended

In your own words, explain how lemonade is different from water.

Multiple Choice

Aluminium foil is an example of a(n):

• Compound

• Mixture

• Element

• Solution

Multiple Choice

Which statement is true about compounds?

• They are made of one type of atom

• They can be separated by physical means

• They are formed when two or more elements combine chemically

• They are mixtures of metals and non-metals

Open Ended

If you keep tearing aluminium foil into smaller pieces, what is the smallest particle you will

get?

Multiple Choice

What is the smallest particle of water that still behaves like water?

• Atom

• Molecule

• Mixture

• Proton

Multiple Choice

In compounds, atoms are:

• Arranged randomly

• Chemically combined in fixed ratios

• Mixed physically without bonding

• Always metals

Multiple Choice

Is salt (NaCl) an element or a compound?

• Element

• Mixture

• Compound

• Solution

Multiple Choice

Can water (H2O) be broken down into simpler substances?

• No, it’s an element

• Yes, into hydrogen and oxygen

• No, it’s a mixture

• Yes, into smaller water particles only

Multiple Choice

Which of the following is a mixture?

• Oxygen

• Copper wire

• Air

• Water

Open Ended

Explain why aluminium is considered an element and not a compound.

Open Ended

Think of one example of an element and one compound from your home. Write them down.