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NS Grade 7 Exam Term 2

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  • ... paper can be red or blue and is an indicator.
    Litmus
  • The differences in living things of the same species.
    Variation
  • ... means that they can be hammered flat into sheets.
    Malleable
  • Infections that can spread by sexual contact.
    STD
  • The period of physical and psychological development that starts with puberty and ends when adulthood is reached.
    Adolescence
  • Ca stands for?
    Calcium
  • The part of the flower that produces pollen.
    Anther / Stamen
  • Fish, reptiles, mammals and birds are all ...
    Vertebrates
  • We use ... to separate oats and salt.
    Sieving
  • Plants with flowers.
    Angiosperms
  • We use the ... method to separate acetone and water.
    Distillation
  • The fusion of male and female sex cells to produce seeds.
    Fertilization
  • A property of a material that will not bend, break, shatter or deform when forces are applied to it.
    Strong
  • Made up of soil and rocks on the crust and seabed of the earth.
    Lithosphere
  • What forms when the pollen grain falls on the stigma?
    Pollen tube
  • Animals with no spine.
    Invertebrates
  • Acids feel ... on the skin.
    Rough
  • Steel is a good ... of heat.
    Conductor
  • Every month, one of the ovaries will release an egg cell. This is known as ...
    Ovulation
  • How many male sex cells goes into the embryo sac during fertilization?
    Two
  • Methods used to prevent pregnancy.
    Contraceptives
  • The transfer of pollen between plants of the same species for the purpose of fertilization.
    Pollination
  • When a liquid becomes a gas due to heat.
    Boiling
  • We use the ... method to separate salt and water. (Salt stays behind)
    Evaporation
  • Another word for HEAT conductivity is ... conductivity.
    Thermal
  • Bases feel ... on the skin.
    Slippery
  • Bases and acids can be dangerous because they are both ...
    Corrosive
  • Water, sugar water, salt water and cooking oil are all ... substances.
    Neutral
  • A method to separate colour pigments.
    Chromatography
  • Bases taste ...
    Bitter
  • The process in which energy is released from glucose.
    Respiration
  • Li stand for?
    Lithium
  • We will use the ... method to separate sand and water.
    Filtration
  • Mg stand for?
    Magnesium
  • The term used to describe a developing baby from eight weeks from fertilization until birth.
    Foetus
  • Distillation can only works if the two substances has different boiling ...
    Points
  • Filtration, sieving and hand sorting are all methods of ...
    Separation
  • Plants with cones.
    Gymnosperms