Year 7 Global Water Quiz

What happens to the molecules when water turns to gas?

• water molecules move slowly and are bound together

• water molecules move very rapidly and are not bound together

• water molecules move very rapidly and are bound together

• water molecules move slowly and are not bound together

What is the formula for density?

• d = m x v

• p = m x v

• d = m\v

• p = m\v

Is water denser than oil?

• Yes, because it has more particles in the same amount of space.

• Yes, because it has less particles in the same amount of space.

• No, because it has more particles in the same amount of space.

• No, because it has less particles in the same amount of space.

What is the most common contaminant in drinking water?

What percentage of the world’s water is contaminated?

In which state of matter are the particles mostly touching but arranged in a random way?

• Solid

• Liquid

• Gas

• Plasma

In which state of matter do the particles have the most energy?

• Solid

• Liquid

• Gas

• Plasma

How many particle?s are there in a human body?

• 7

• 7 Billion

• 7 Billion Billion

• 7 Billion Billion Billion

What does homogenous mean?

• homogenous means the different

• homogenous means the same

• homogenous means the variable

• homogenous means the smart

What is the difference between an impure and pure substance?

• An impure substance is one that is dirty. A pure substance is a substance that is made by nature.

• An impure substance consists of one type of particle. A pure substance is a substance that only contains elements.

• An pure substance consists of more than one type of particle. A impure substance is a substance that only has one type of particle (element or compound).

• An impure substance consists of more than one type of particle. A pure substance is a substance that only has one type of particle (element or compound).