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NS T4 Exam Grade 7

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