Year 9 Chemistry

I can: understand the 3 acid reactions (metal, base, carbonate); describe errors, their sources and effects; recognise elemental symbols.

• Yep! All over it.

• I understand most.

• I have gaps in my understanding.

• Help!

The symbol for Calcium is

• C

• Cs

• Cat

• Ca

When an acid reacts with a metal, it produces

• a salt and water.

• a salt and hydrogen gas.

• a salt, water and carbon dioxide gas.

• no reaction.

An example of a systematic error is

• the time in which you take a measurement.

• a flaw in an instrument producing the same inaccuracy each time used.

• measuring in mm instead of cm.

• spilling acid over my practical sheet.

To produce Hydrogen gas, an acid must react with

• Water.

• A base

• Carbonate

• Metal

An outlier is

• A data value that is numerically distant from the data set.

• an error only affecting the mode of a data set.

• something which always affects the mean, median, mode and range of a data set.

• a number greater than the mean.

I test the growth of a sunflower with different concentrations of the same fertiliser. The dependent variable is

• the concentration of fertiliser.

• the growth of the sunflower.

• the soil used.

• how much water was given.

To produce Carbon Dioxide (gas), an acid must react with

• an acid.

• a metal.

• a base.

• a carbonate.

Helium is in the 8th group on the periodic table. The number of valence electrons Helium contains is

• 8

• 12

• 2

• 1

In a marble statue, which of the following chemicals reacts with acid rain to produce Carbon Dioxide.

• Hydrogen

• Carbon

• Calcium

• Carbonate