Chemistry - Grade 9 - SBQ1

Which of the following is a quantitative observation?

• Nickel metal is shiny

• The color of the bulb is yellow

• The surface of the rock is rough

• The temperature of the solution is 38C

Which of the following is a qualitative observation about a piece of metal?

• It is shiny

• t has a volume of 3.7 cm3

• It has a mass of 21.5 grams

• It has a density of 5.8 g/cm3

A student believes that the amount of water given to different plants will affect its growth.

The dependent variable is _________.

• type of soil

• type of plant

• growth of the plant

• amount of sunlight

A student believes that the amount of water given to different plants will affect its growth.

The independent variable is _________.

• type of soil

• amount of water

• type of plant

• growth of the plant

Which of the following graphs represent(s) a direct relationship?

• 
• 
• 

A graph that represents a direct relationship has a positive slope.

• True

• False

A graph that represents an inverse relationship has a negative slope.

• True

• False

A student measure the volume of a plastic bottle and found the results to be 20.09 ml / 20.08ml / 20.04 ml.

If the actual value is 20.0 ml. then his results are __________.

• accurate and precise

• accurate and imprecise

• inaccurate and imprecise

• inaccurate and precise

The measure of how close the results re to each other is ______________.

• accuracy

• precision

A measure of how the results are close to a certain value is ____________.

• Accuracy

• precision