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Cambridge 7 unit 3

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  • to change from gas to liquid
    condense
  • a nerve cell that carries messages in the body
    neurone
  • making more organisms of the same species
    reproduction
  • the temperature when a liquid starts to boil
    boiling point
  • the part of a plant cell where food is made
    chloroplast
  • Which object is in the center of our solar system
    Earth
    Sun
    Black Hole
    Nebula
  • a group of organs that work together
    organ system
  • Which object has the largest mass in the solar system
    Neptune
    Earth
    Jupiter
    Sun
  • a cloud of dust and gas in space
    Nebula
  • feeding: taking in nutrients to provide energy and materials for growth
    nutrition
  • a microscope that uses electron beams instead of light beams; it is able to achieve much higher resolution than a light microscope
    electron microscope
  • the bottom layer of cells on a leaf
    lower epidermis
  • made to do a special job
    specialised
  • a group of cells that do the same job
    tissue
  • changing the position of all, or part, of the body
    movement
  • to make something look bigger
    magnify
  • tiny hairs that help move things in the body
    cilia
  • a smart guess you can test in an experiment
    hypothesis
  • a thin layer of cells on an onion, easy to see under a microscope
    onion epidermis
  • the thin layer that surrounds a cell and controls what goes in and out
    cell membrane
  • to change from solid to liquid
    melt
  • a long part of a nerve cell that sends messages
    axon
  • pressed into a smaller space
    compressed
  • a plant cell that collects sunlight to make food
    palisade cell
  • the top layer of cells on a leaf
    upper epidermis
  • a short branch of a nerve cell that gets messages
    dendrite
  • a part of a plant cell that holds water and nutrients
    sap vacuole
  • Scientists use computers to make ____________. A way of representing something that can't be made or observed directly
    models
  • the temperature when a solid starts to melt
    melting point
  • a quality or feature that something has
    property
  • the part of a cell that gives energy
    mitochondria
  • able to have offspring
    fertile
  • rain, snow, or hail that falls from the sky
    precipitation
  • A place where boats dock with the land and are safe from the dangers of the open ocean
    harbor
  • a cell on a root that helps take in water from the soil
    root hair cell
  • A bag of sugar is lifted onto a high table. State two energy stores in the sugar.
    Chemical / Gravitational Potential
  • energy stored in things that are stretched or squeezed
    elastic potential
  • when something changes from solid, liquid, or gas to another form
    change of state
  • a thick, sticky liquid made in the body
    mucus
  • water that flows over the land after rain
    surface run-off
  • an identification tool for objects or organisms; most keys provide sets of statements for you to choose between, where answer leads to you another set of statements and finally an identification
    key
  • to move smoothly like water or air
    flow
  • unable to reproduce, usually because gametes cannot be formed
    infertile
  • a strong material that makes up plant cell walls
    cellulose
  • a tiny piece of something, too small to see
    particle
  • water in the air in gas form
    water vapour
  • defined here as a group of organisms that can reproduce together to produce fertile offspring
    species
  • a sample, for example a piece of rock, or a single organism of a species
    specimen
  • Which planet would you weigh the most on?
    Jupiter
  • when gas turns into a liquid
    condensation
  • the difference between high tide and low tide
    tidal range
  • changed to help something live or do its job better
    adapted
  • how water moves in a circle through the air, land, and sea
    water cycle
  • exactly the same
    identical
  • a green substance in plants that helps them make food
    chlorophyll
  • the job or purpose of something
    function
  • an idea that explains how something works
    theory
  • An object causes a strong force of gravity. What must the object have?
    a large size
    a large mass
    a small mass
    a small size
  • to make a liquid go from one place to another
    pour
  • What is the mass of an airplane that weighs 90,000 N
    ~9,000 kg
  • children
    offspring
  • tides also cause the land to change height (about 30cm) throughout the day. this is called ____.
    earth tide
  • hot gas that comes from boiling water
    steam
  • a soft layer in a leaf that has spaces for air
    spongy layer
  • energy transferred by photons
    light
  • removing toxins or materials excess to requirements from the body
    excretion
  • a part of the body that does a special job
    organ
  • a red protein in blood that carries oxygen
    haemoglobin
  • a cell with small hairs that move things along
    ciliated cell
  • a tool used to measure temperature
    thermometer
  • a permanent increase in size
    growth
  • energy transferred by vibrations
    sound
  • water that is under the ground
    groundwater
  • Complete the sentence : As the mass of a planet ____________________ the strength of gravity on the planet ____________________.
    increases/increases -or- decreases/decreases
  • energy stored in hot objects
    thermal
  • to take in something, like water or light
    absorb
  • an illness caused by a virus, often known as flu; it affects the respiratory system and usually results in a high temperature
    influenza
  • The strength of gravity on a planet is 5 N/kg. Calculate the weight of an 800 kg spacecraft on that planet.
    4000 Newtons
  • the line an object spins around
    axis
  • the curved top of water in a glass or tube
    meniscus
  • a space with no air or matter in it
    vacuum
  • How much does someone with a mass of 75kg weigh on Earth
    ~750 N
  • the smallest part of a living thing
    cell
  • polymers of amino acids; they are important nutrients for living organisms, as they are used in growth and repair
    protein
  • branching into two; most keys involve a statement to which the user answers yes or no, or pairs of contrasting statements to choose between
    dichotomous
  • energy sored in objects lifted away from earth
    gravitational potential
  • a very small blood vessel that connects arteries and veins
    capillary
  • energy transfered by the flow of electrons
    electrical
  • to change from liquid to solid
    freeze
  • anything that takes up space and has mass
    matter
  • differences between members of the same species
    variation
  • the top part of a leaf that collects light
    palisade layer
  • the stiff outer part of a plant cell
    cell wall
  • a cell in the blood that carries oxygen
    red blood cell
  • a type of cell with tiny hairs that help move things
    ciliated epithelium
  • the control center of the cell
    nucleus
  • a living thing like a plant, animal, or person
    organism
  • A skydiver jumping from a plane with accelerate until it reaches it's "terminal velocity" at this point the skydiver will no longer accelerate toward earth and instead maintain a constant velocity. Why does this happen?
    Air resistance
  • a nucleic acid found in all living cells; most cells contain both RNA and DNA, but some viruses contain only RNA
    RNA
  • something that stops or slows down what you can do
    limitations
  • the three forms of matter: solid, liquid, and gas
    states of matter
  • a substance that gives color to something
    pigment
  • water that comes out of plants into the air
    transpiration
  • energy stored in food, batteries, or fuel
    chemical
  • a tool used to measure liquid
    measuring cylinder
  • breaking down food to release energy that the organism can use
    respiration
  • A space where there are no particles of matter
    vacuum
  • the layer of air around the Earth
    atmosphere
  • a particle made of either RNA or DNA, surrounded by a protein coat; viruses hijack the machinery of a host cell to replicate
    virus
  • the amount of space something takes up
    volume
  • energy stored due to movement of an object
    kinetic
  • detecting changes in the environment
    sensitivity
  • when liquid turns into gas
    evaporation
  • to heat a liquid until it changes to gas
    boil
  • to move back and forth very fast
    vibrate
  • water you can see on the surface, like lakes and rivers
    open water
  • a jelly-like material inside a cell that holds other parts
    cytoplasm
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