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GCSEMathsAQAHigherFlashcards3. Ratio, Proportion & Rates of ChangeStandard & Compound Units

Standard & Compound Units (AQA GCSE Maths)

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    What hours in the day are covered by AM?

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  • What hours in the day are covered by AM?

    AM is the time between midnight (12am) and midday (12pm).

  • What is the equation that converts minutes to hours?

    The equation that converts hours to minutes is Hours equals Minutes divided by 60.

  • How many days are there in a year?

    There are 365 days in a normal year and 366 days in a leap year.

  • True or False?

    An analogue clock works in 24 hours time.

    False.

    An analogue clock works in 12 hour time.

  • What hours in the day are covered by PM?

    PM is the time between midday (12pm) and midnight (12am).

  • What is the equation that converts hours to minutes?

    The equation that converts hours to minutes is Minutes equals Hours cross times 60.

  • How many hours are there in one day?

    A day has 24 hours.

  • How many days are in a week?

    There are 7 days in a week.

  • True or false?

    To convert between two metric units of measure, you must multiply or divide by powers of 10.

    True.

    To convert between two metric units of measure, you must multiply or divide by powers of 10.

    E.g. to convert from centimetres to metres, divide by 100.

  • What is the equation used to convert kilometres to metres?

    The equation used to convert kilometres to metres is:

    Metres equals Kilometres cross times 1000.

  • What is the equation used to convert millilitres to litres?

    The equation used to convert millilitres to litres is:

    Litres equals Millilitres over 1000.

  • What is the equation used to convert kilograms to milligrams?

    The equation used to convert kilograms to milligrams is:

    Milligrams equals Kilograms cross times 1 comma 000 comma 000.

  • What type of quantity is measured using cubic units?

    Cubic units are units used to measure volume.

  • True or False?

    To convert between cubic units, you must multiply or divide by the normal unit conversion rate.

    False.

    To convert between cubic units, you must multiply or divide by the 'cubed' conversion rate.

    E.g. to convert from cm3 to m3 you must divide by 1003.

  • What type of units are used to measure area?

    Square units are used to measure area.

  • True or False?

    To convert between square units, you must multiply or divide by the 'squared' conversion rate.

    True.

    To convert between square units, you must multiply or divide by the 'squared' conversion rate.

    E.g. to convert from km2 to m2 you must multiply by 10002.

  • Define the term compound measure.

    A compound measure is something calculated using more than one measurement, e.g. speed is calculated using distance and time.

  • True or False?

    Flow rate is an example of a compound measure.

    True.

    Flow rate is an example of a compound measure.

    It combines two measures (volume and time) by looking at the volume of fluid that moves over time, (e.g. cm3 / s).

  • Define the term population density.

    Population density is the measure of how many people there are per unit of area.

  • True or False?

    The units of a compound measure can be used to find the equation needed to calculate it.

    True.

    You can use the units of a compound measure to find the equation used to calculate it.

    For example, speed is often measured in km / h.
    Km (kilometres) is a measure of distance and h (hours) is a measure of time, so the calculation for speed is:

    Speed space equals fraction numerator space Distance over denominator Time end fraction

  • True or False?

    When using a formula triangle with a compound measure, you can add the two values at the base of the triangle to find the value at the top of the triangle.

    False.

    When using a formula triangle with a compound measure, you need to multiply the two values at the base of the triangle to find the value at the top of the triangle.

  • True or false?

    Speed is the measure of how much distance changes per unit of time.

    True.

    Speed is the measure of how much distance changes per unit of time.

  • Define the term density.

    Density is the measure of how heavy something is per unit of volume or area.

  • True or False?

    Density is measured in Pascals (Pa).

    False.

    Pressure is measured in Pascals (Pa).

    Density is measured in kg/m3.

  • What is the equation used to calculate speed?

    The equation used to calculate speed is:

    Speed equals Distance over Time.

  • What quantity could be measured with the units kg/cm3?

    The units kg/cm3 could be used to measure density (mass per volume).

  • What is the equation used to calculate density?

    The equation used to calculate density is:

    Density equals Mass divided by Volume.

  • True or False?

    Speed is measured in kg/m.

    False.

    Speed is measured in units like m/s or km/h.

  • What is the equation used to calculate pressure?

    The equation used to calculate pressure is:

    Pressure equals Force divided by Area.

Previous:Direct & Inverse ProportionNext:Exchange Rates & Best Buys

    1. Topic 1

      Number Operations

    2. Topic 2

      Prime Factors, HCF & LCM

    3. Topic 3

      Powers, Roots & Standard Form

    4. Topic 4

      Fractions

    5. Topic 5

      Percentages

    6. Topic 6

      Simple & Compound Interest, Growth & Decay

    7. Topic 7

      Fractions, Decimals & Percentages

    8. Topic 8

      Rounding, Estimation & Bounds

    9. Topic 9

      Surds

    10. Topic 10

      Using a Calculator

    1. Topic 1

      Introduction to Algebra

    2. Topic 2

      Algebraic Roots & Indices

    3. Topic 3

      Expanding Brackets

    4. Topic 4

      Factorising

    5. Topic 5

      Completing the Square

    6. Topic 6

      Algebraic Fractions

    7. Topic 7

      Rearranging Formulas

    8. Topic 8

      Algebraic Proof

    9. Topic 9

      Linear Equations

    10. Topic 10

      Quadratic Equations

    11. Topic 11

      Simultaneous Equations

    12. Topic 12

      Iteration

    13. Topic 13

      Forming & Solving Equations

    14. Topic 14

      Functions

    15. Topic 15

      Coordinate Geometry

    16. Topic 16

      Linear Graphs

    17. Topic 17

      Graphs of Functions

    18. Topic 18

      Equation of a Circle

    19. Topic 19

      Estimating Gradients & Areas under Graphs

    20. Topic 20

      Real-Life Graphs

    21. Topic 21

      Solving Inequalities

    22. Topic 22

      Graphing Inequalities

    23. Topic 23

      Transformations of Graphs

    24. Topic 24

      Sequences

    1. Topic 1

      Ratios

    2. Topic 2

      Problem Solving with Ratios

    3. Topic 3

      Direct & Inverse Proportion

    4. Topic 4

      Standard & Compound Units

    5. Topic 5

      Exchange Rates & Best Buys

    1. Topic 1

      Symmetry & Shapes

    2. Topic 2

      Angles in Polygons & Parallel Lines

    3. Topic 3

      Bearings, Scale Drawing, Constructions & Loci

    4. Topic 4

      Circle Theorems

    5. Topic 5

      Area & Perimeter

    6. Topic 6

      Circles, Arcs & Sectors

    7. Topic 7

      Volume & Surface Area

    8. Topic 8

      Congruence, Similarity & Geometrical Proof

    9. Topic 9

      Area & Volume of Similar Shapes

    10. Topic 10

      Pythagoras & Trigonometry

    11. Topic 11

      Sine, Cosine Rule & Area of Triangles

    12. Topic 12

      3D Pythagoras & Trigonometry

    13. Topic 13

      Vectors

    14. Topic 14

      Transformations

    1. Topic 1

      Introduction to Probability

    2. Topic 2

      Simple Probability Diagrams

    3. Topic 3

      Tree Diagrams

    4. Topic 4

      Combined & Conditional Probability

    1. Topic 1

      Averages, Ranges & Data

    2. Topic 2

      Statistical Diagrams

    3. Topic 3

      Histograms

    4. Topic 4

      Cumulative Frequency & Box Plots

    5. Topic 5

      Scatter Graphs & Correlation