Science Flashcards
In a series circuit the voltage is ??? between the components
Shared
The voltage supplied to each parallel branch is ???
The same
Function of spongy layer
Allow carbon dioxide to diffuse through the leaf
Function of stomata
Alows carbon dioxide to enter the leaf and oxygen to leave
Function of palisade cell
Let chloroplasts absorb sunlight
Function of way layer
Protect the leaf without blocking out light
Guard cells
Controls the opening and the closing of the stomata
Air gaps
Allow carbon dioxide to diffuse through the leaf
What is the role of the leaf in a plant?
There’s two
The main role of the leaf is to collect sunlight for photosynthesis - to make plants food (glucose)
Another is to allow carbon dioxide out of the leaf and oxygen in.
Function of a cell wall
Provides structure and support to the cell
Function of a cell membrane
Controls what enters and leaves the cell
Function of a cytoplasm
When reactions occur within the cell
Function of a Nucleus
Controls the activities in the cell and contains genetic material
Function of a vacuole
Where starch and water are stored
Function of a chloroplast
The site of photosynthesis
What goes into the plant?
Oxygen
What does the plant release?
Carbon dioxide
Water can only fly uo the plant, so it will always travel up from the roots, and leave through the stomata.
Xylem or Phloem?
Xylem
Pop Star Can Make Absolute Zillions If Tiny Little Children Spend Gold Pennies
Potassium, Sodium, Calcium, Magnesium, Aluminium, Zinc, Iron, Tin, Lithium, Copper, Silver, Gold, Platinum
Difference between metals and non-metals?
Three each
Metal : Good conductor of heat, good conductor of electricity, magnetic, shiny, soluble,malleable, sonorous sound, high melting points, solid at room temperature and ductile
Non-metals : Low boiling point, not shiny, bad conductor of heat, bad conductor of electricity, dull sound, brittle
What does MASH stand for?
Metal + Acid ——> Salt + Hydrogen
What does BASHO stand for?
Base + Acid ——> Salt + Water
What does CASHOCO stand for?
Carbonate + Acid ——> Salt + Water + Carbon dioxide
Test for hydrogen
Squeaky pop
Glucose can travel up and down, it is made in the leaves and can go down to the roots, or travel further up the plants.
Xylem or Phloem?
Phloem
Test for Carbon Dioxide
Lime water goes cloudy
Test for oxygen
The splint delights itself
What does the ammeter measure?
The current
Does the current get shared in a parallel circuit?
Yes
Does the current get shared in a single circuit?
No
How does water dispersal occur?
When the fruit and the seed are able to float along the water source, they’ll germinate in the water or when they reach their destination
What name is given to the change of speed that happens between 0 and 4 seconds?
Acceleration
What makes a fuel great?
Good cost, abundant, safe, environmentally friendly, transport easily, easily ignited, sustainable, efficiency
What causes global dimming?
Carbon (soot)
Does monoxide kill?
Yes, it’s toxic
What does acid rain kill?
Buildings, forest crops, statues and aquatic animals
Name the four seed dispersal
Water Dispersal
Animal Dispersal
Ejection Dispersal
Wind Dispersal
What is respiration?
Where the body creates energy so you can make movements
What are the 7 terms we use to decide whether something is living or not?
MRS GREN
Movement Respiration Sensitivity Growth Reproduction Excretion Nutrition
How do substance enter and exit a cell?
Diffusion
Why are bees so important to plants?
They help plants reproduce
What does chloroplasts contain?
Chlorophyll
Why are leafs green?
Because the chlorophyll from the chloroplasts makes it that colour
What is the role of the red blood cell?
To carry more oxygen around the body
What is the role of the nerve cell?
To transmit messages from one part of the body to an another
What is the role of the egg cell?
They are utilised by female organisms to reproduce offspring
What is the role of the sperm cell?
To pass on biological information required to produce a new organism
Cells that have features so that they can do particular jobs are called???
Specialised cells
What substance do red blood cells carry around the body?
Oxygen
Nerve cells can transmit electrical signals because they are???
Long and thin
What is the role of the root hair cell?
Allow the plant to absorb more water. They also allow the plant to rake in the minerals in needs to survive.
What is inheritance?
Parents pass on their alleles on to offspring
What are alleles?
It is a variation of a gene.
What is a chromosome?
Thin strands of DNA
What is a gene?
A small section of DNA on a chromosome that codes for a protein.
Where are chromosomes found?
Nucleus
What is photosynthesis?
When the plant makes food for itself
Name two highly important reactions that move carbon around the environment
Photosynthesis
Respiration
Equation for photosynthesis
Carbon dioxide + Water ——> Oxygen + Glucose
Equation for respiration
Oxygen + Glucose ——> carbon dioxide + water
What is Global Warming?
It is the term used to describe a gradual increase in the average temperature of the earth’s atmosphere and its oceans.
What are the greenhouse gases?
Water vapour Carbon dioxide Methane Nitrous oxide Ozone
What activities do we do that contribute to greenhouse gases
Deforestation
Burning Fossil Fuels
Distributing fossil fuels releases greenhouse gases
Animals emit methane
What happens in exothermic and endothermic reactions?
In endothermic reactions, energy enters
In exothermic reaction, energy exits
Name one type of chemical reaction that is exothermic
Combustion
Neutralisation
Name one type of chemical reaction that is endothermic
Thermal decomposition
What is Thermal Decomposition?
Carbon dioxide caused by heat
Where is the genetic material found in cells?
Nucleus
Name the greenhouse gases
Water vapour
Carbon dioxide
Methane
How do humans create global warming?
Because breathe out water vapour and carbon dioxide. We also release methane from our bottom.
How is acid rain made?
Sulphur dioxide and Nitrogen oxide gases are released they go into the clouds (mixed with water vapour) and rain back down.
Causes of Nitrogen acid
Cars
Engines
Factories
Cause of Sulphur dioxide
Burning coal
Burning charcoal
Burning wood
What is combustion?
Burning a fossil fuel in oxygen
Thermal decomposition
What goes in must come out
Where do you get greenhouse gases?
Burning fossil fuels(factories)
Cars
Farming
Deforestation
Effects of greenhouse gases
Rise of sea levels
Melting ice caps
Extreme whether - fires
Why is Nitrogen oxide and Sulphur dioxide bad?
Gets into lakes
Erode building
Kills trees
