Being a Scientist-2. Observations and measurements

Spot the mistake(s) in this table of results

• There are units in the mean (average) column

• the unit is in the independent variable box

• The dependent variable is missing a unit

• The dependent and independent variables should be switched

Answer explanation

The correct choice is that the dependent variable is missing a unit. This is crucial for clarity in results, as units provide context for the measurements being reported.

Tags

NGSS.MS-PS3-4

The independent variable should be on the____________side of the table

Answer explanation

The independent variable is typically placed on the left side of a table, while the dependent variable is on the right. This convention helps in clearly distinguishing between the two types of variables.

How do you calculate the average in a table?

• substract all your results then multiply them by the number of results

• add all your results then multiply them by the number of results

• add all your results

• add all your results then divide them by the number of results

• substract all your results

Answer explanation

To calculate the average, you add all your results together and then divide by the number of results. This gives you the mean value, which is the correct method for finding the average.

Which variable goes in column 'A' of the results table?

• Independent

• Dependent

• Controlled

Answer explanation

The independent variable is the one that is manipulated or changed in an experiment. It is placed in column 'A' of the results table to show how it affects the dependent variable.

Tags

NGSS.MS-PS3-4

Which variable goes in column 'B' of the results table?

• Independent

• Dependent

• Controlled

Answer explanation

The dependent variable is the one being measured in an experiment. It goes in column 'B' of the results table, as it reflects the outcomes affected by changes in the independent variable.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS2-2

What should you use to draw a table of results?

• Pencil

• Ruler

• Compas

• Feltip

• Pen

Answer explanation

To draw a table of results, a pencil is useful for making adjustments, and a ruler ensures straight lines and accurate measurements. Other options like felt tip or pen are less suitable for initial drafts.

Where should the units go for each column?

• In the white spaces - by each result

• In the headings (grey spaces)

• In the headings and by each result

Answer explanation

Units should be placed in the headings (grey spaces) to clearly indicate what each column represents. This helps in understanding the data at a glance, rather than cluttering the results with repeated units.

What mass is shown on the scale?

• 3.5kg

• 3.25kg

• 3.1kg

• 3.2kg

Answer explanation

The scale shows 3.25kg, which is the most accurate reading among the options. It is important to choose the value that best represents the measurement displayed.

What temperature is shown on the thermometer?

• 21^oC

• 22^oC

• 25^oC

• 20^oC

Answer explanation

The thermometer shows 22°C, which is the correct answer. The other options (20°C, 21°C, and 25°C) do not match the reading indicated on the thermometer.

What temperature is shown on this thermometer?

• 2^oC

• 5^oC

• 4^oC

• 12^oC

Answer explanation

The thermometer shows 4°C, which is indicated by the level of the liquid in the thermometer. The other options do not match the reading, confirming that 4°C is the correct answer.