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NS T4 Exam Grade 7

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  • He improved the telescope.
    Galileo Galilei
  • These two siblings made a model of 90 000 stars.
    William and Caroline Herschel
  • What energies are wasted in a drilling machine?
    Heat and sound energy
  • Name 3 heat transfer methods.
    Conduction, convection, radiation.
  • The Earth ... around its own axis once per day.
    Rotates
  • Energy that is stored in a system.
    Potential energy
  • Give an example of conduction.
    A pot of water on the stove top.
  • The imaginary line above the equator.
    Tropic of Cancer
  • Is the following an example of potential or kinetic energy: A dog runs after a ball.
    Kinetic energy
  • ... rays are focused on a wide area and are therefor less intense than direct rays.
    Oblique
  • The Earth is tilted at an angle of ...
    23,5 degrees
  • Name 3 examples of non-renewable energy sources.
    Coal, oil, gas, uranium, nuclear fuels
  • Correct the following: The Northen Hemisphere has WINTER in June.
    The Northen Hemisphere has summer in June.
  • Electricity: Coal is ... and set on fire.
    Grinded
  • What is the unit of measurement of potential energy?
    Joule
  • Factors that affect an objects gravity are ...
    Mass and distance
  • Give an example of convection.
    An air conditioner that cools or heats up a room. A fire that heats a room. Any good answer.
  • Correct the following: The Southern Hemisphere has WINTER in December.
    The Southern Hemisphere has summer in December.
  • ... is the amount of matter in an object.
    Mass
  • The side of the Earth facing the Sun experiences... and the other side of the Earth facing away experiences ...
    Day / night
  • Electricity: The generator works with magnets that changes ... energy to electrical energy.
    kinetic
  • Energy that causes a change in motion.
    Kinetic energy
  • During photosynthesis plants use ... to absorb light energy and change it to glucose.
    Chlorophyll
  • Millions of years ago, plants in swamps absorbed ...energy from the Sun.
    Light
  • When do we get spring tide?
    When the moon and the Sun are aligned with the Earth.
  • A fuel that formed underground from living material millions of years ago.
    Fossil fuels
  • Give an example of radiation.
    Sun shining, Any good answer.
  • ... are the predictable, repeated rise and fall of the sea and ocean levels.
    Tides
  • Correct the following: The Southern Hemisphere has spring in MARCH.
    The Southern Hemisphere has spring in September.
  • Electricity: The fire heats up water and forms ...
    Steam
  • We use the ... calendar.
    Gregorian
  • Electricity: The steam moves down pipes and turns a ...
    Turbine
  • Electricity: The ... that turn switches on the generators.
    Turbines
  • Peat experience more pressure and moves closer to the center of the Earth. The ... changes the peat into fossil fuels.
    Heat
  • He theorized that the Sun is in the middle of the solar system and not the Earth.
    Copernicus
  • Is the following an example of potential or kinetic energy: A taxi stops to pick up passengers.
    Potential energy
  • Keep items cold because they slow down heat transfer from the environment.
    Heat insulator
  • Energy from moving water.
    Hydroelectricity
  • The part of the Earth above the ... is known as the Northern Hemisphere.
    Equator
  • Name two important things we get from photosynthesis.
    Oxygen and Glucose sugar
  • He discovered that gravity was keeping the planets in their orbits.
    Isaac Newton
  • Soil, dust and other matter that settles to form a layer at the bottom of a liquid.
    Sediment
  • He discovered that the planets orbited the Sun in an elliptical pattern.
    Johannes Kepler
  • Correct the following: The Northern Hemisphere has AUTUMN in March.
    The Northern Hemisphere has Spring in March.
  • A pot of soup that is heated on a stove is an example of a... system.
    Thermal
  • Is the following an example of potential or kinetic energy: A dancer jumps in the air.
    Kinetic energy
  • Correct the following: The summer in the Southern Hemisphere starts in JANUARY.
    The summer in the Southern Hemisphere starts in December.
  • Why was it important for the San people to know when it was going to be full moon?
    They went hunting when it was full moon because there was more light to see.
  • Describe the life of the San tribe in summer.
    Lived in small groups because there was a lot of food available.
  • Is the following an example of potential or kinetic energy: A pencil is lying on the edge of a table.
    Potential energy
  • A small device that converts mechanical kinetic energy into electrical energy.
    Dynamo
  • Name 2 adaptations animals and plants have to live in the high tide zone.
    A shell and suckers.
  • There was a lot of pressure on the dead matter and it changed into ...
    Peat
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