Photosynthesis

• what is the word equation for photosynthesis?

  Carbon dioxide + water + sunlight -> glucose + oxygen
• How do plants get carbon dioxide?

  Through stomata on leaves.
• How do plants get water?

  Roots
• Why is the top of the leaf darker than the underside of the leaf?

  More chlorophyll
• How to test a leaf for starch

  1. Add iodine until leaf is drenched
  2. Wait for a few mins to see if a blue black colour develops
• What colour will the leaf turn if there is starch?

  Blue/Black
• What colour will the leaf turn if there is no starch?

  Brown
• There is

  • Nitrogen
  • Phosphorus
  • Potassium
  • Magnesium in a plant
• Farmers use fertilisers as it provides plant nutrition
• A food chain shows what is eaten by what.
• Energy gets passed down the line being transferred.
• Why do food chains only have 4/5 links?


  If there were more links too little energy would be transferred to the organism at the top of the chain
• What is the listing of a food chain?

  Producer, primary consumer, secondary consumer
• What is bioaccumulation?

  Bioaccumulation is when harmful chemicals are passed on throughout populations. Toxins can enter the food chain in several ways , dissolving through water, pesticides, soft mud, chemicals can fall through the air.
• What is an ecosystem?

  An ecosystem is a community of living organisms and their interactions with each other and their physical environment.
• What is a habitat?


  A habitat is the natural environment where a particular organism or species lives and obtains the resources it needs to survive.
• What is a community?

  A community is all the different organisms that live in a specific area.
• What is a niche?


  A niche is a particular place or role that an organism has within an ecosystem.
• What is a food web?

  A food web is a diagram that shows the interconnected feeding relationships between different organisms in an ecosystem.