Year 7 Chemical Sciences Multi choice

A gold ring is an example of a:

• solid

• liquid

• gas

• plasma

Which of the following states is easily compressed?

• solid

• liquid

• gas

• plasma

Which of the following states of matter does not have the ability to flow and take on new shapes?

• solid

• liquid

• gas

• plasma

To evaporate a liquid, you need to:

• add energy to it

• remove energy from it

• cool it down

• condense it

A solution consists of:

• solid particles suspended in water

• two different solids ground into powder form and mixed

• one substance dissolved in another

• bubbles of gas in a liquid

Iona and Ross were doing an experiment that involved salt to water. They added one teaspoon of salt to the water and stirred it, and all the salt dissolved. This means that salt:

• is insoluble in water

• is soluble in water

• is an unstable substance

• cannot be identified as soluble or insoluble from the information given

Isabhella added three teaspoons of salt to water and stirred it, and all the salt dissolved. As more salt dissolves in the water, the mixture becomes:

• more concentrated

• less concentrated

• diluted

• more cloudy

Which type of separation is best suited to removing grains of rice from hot water?

• Distillation

• Filtration

• Sieving

• Centrifuging

A student wishes to obtain fresh water from salt water. The best way to do this is by:

• filtration

• evaporation

• distillation

• decanting