Working Scientifically

Sarah is studying how plants grow in different types of soil. Which branch of science is she working in?

• Physics

• Chemistry

• Geology

• Biology

The piece of equipment shown below is a:

• test tube

• beaker

• funnel

• conical flask

A measuring cylinder is a piece of equipment for:

• stirring mixtures.

• heating substances.

• measuring volumes of liquids.

• mixing and heating substances.

Which rule below would you NOT follow when using a Bunsen burner?

• Long hair must be tied back.

• Wear protective clothing and safety glasses.

• Place the Bunsen burner directly onto the unprotected bench.

• Keep the gas tap closed when attaching the rubber hose from the Bunsen burner.

Which of the following is a quantitative observation?

• The plant grew tall.

• The plant was green.

• The plant grew to a height of 15 cm.

• The plant had broad leaves.

A student uses a chemical that has the warning label shown.

A chemical has this sign on its bottle. What does this sign tell you about the chemical?

• It reacts explosively with water.

• It can be absorbed by the skin.

• It is easily set on fire.

• It can be used to extinguish fires.

Which is the correct way of writing the unit symbol for grams?

• g

• kgs

• G

• gs

Some important steps in using a Bunsen burner are listed below, but the sequence is incorrect.

1. Light a match and hold it over the barrel.

2. Adjust the flame by moving the collar until the airhole is open.

3. Connect the rubber hose to the gas tap.

4. Turn on the gas tap and a yellow flame will appear.

5. Close the airhole of the Bunsen burner collar.

• 3, 5, 4, 1, 2.

• 3, 5, 1, 4, 2.

• 5, 3, 4, 1, 2.

• 1, 3, 5, 4, 2.

Which is NOT true about a Bunsen burner?

• The airhole must be closed when lighting a Bunsen burner.

• When not in use, the yellow safety flame of a Bunsen burner should be visible.

• The blue flame of a Bunsen burner is cooler than the yellow flame.

• A Bunsen burner must always be placed on a heatproof mat.

In a particular experiment, a candle was burned and students noted how many observations they were able to make. Which of the following could be a hypothesis relating to this experiment?

• The burning candle produced little smoke.

• I will be able to make at least 10 observations.

• The candle completely melted after 12 minutes.

• I was able to make 15 observations.